Marion Walter Jacobs (May 1, 1930 – February 15, 1968), known as Little Walter, was an American blues musician, singer, and songwriter. His revolutionary approach to the harmonica had a strong impact
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc85809800e2bc48d5efe901cf8633d50b491abea826c2b3247ceefdea919a46. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db98a536-9440-4a9e-a5a3-653bb7a66231.json and https://artists.proofprofile.net/proofs/artist/db98a536-9440-4a9e-a5a3-653bb7a66231.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6215cc2b1f53bc99eae6ff4ac8eb4de06d2ab522c15bd9f494f6775d3f3bf066. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC16748815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e9ea79e09d3304e67d137817f8cc276c1669ff40cc29204ca7210c0851f7d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC16748816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23ed162fb88258380ccdb3689954ee8a161122c69f0bcbc682c0902c7573bf6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC16748817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9060f5eaacc0f8acf9044b2eaf28b4f04163a1a30ae1a84e46d471a9f5290289. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC16748818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4d48930b8bd205d1f50b38c8b3c9b5c9504de61108904cc0b5ae2f45cfbedb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC16748819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32fc4222adcca9fe4e7030e3a618f82a12b0f0c1f0894c9a578139f5cca2599. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC16748820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6e410b4ca53fe29501e8ae93bb175fdb5ce7d50907f660e16dacb9a89e9441. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC16748821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eab30d0aa647a9784b5659a2f7704a7d67481b9ccd3a4c563ff4fdb3d958ed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC16748822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831673b2f8363809f968f9b15773c969be4d1a78945340ee91c79609f0ed82d3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66798c87b5258269ff3c490e07c93bb4817fb7f801c7da03c47a47212deb612c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHQC0563526.
The Complete Chess Masters (1950 - 1967)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7eb124a035546281056ae2a01fac454a56999e4b3ff49f586be6eef0b1a404. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM70951720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cbdff83e57387735112be22ad50266b0b89e65aec24cb407a5ba2580d9a8f7. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM70951934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2aea79a9e06f3f63f7fae151a95b7eef7e6ad30570f25aefe4bba53d769758. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM70951713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d94cecedb5fadecf36e1449ba339c2c668b152b8283ae8c10a5780ab67f679c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBLY0605698.
His Best - The Chess 50th Anniversary Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e1846814644b721e194068373a086e4b85558332f4178de2456c58f8bf28ea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15550834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1942ef0131828cbbc7b91e3e6403e75df177f882d60d262220df9fd6b9bf0aaa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15750836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa41bbae1254f6fd4e325b2a847cc83c7ca6108027ea823618fa7f66a726cd5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15550837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0ca0d9ed1c54bc315753cd3617453e29852f2c5c023ad75c12fb383c1ec32. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15850841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7ea67a4664013f41b655b85abf5c254ba721fbf7ae89cfbefabccd9f6f6299. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15950844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efbff3dee0b699e73158bcc70da847da93471dd09b03526557e6065c689b1f4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC10400657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd808a74a892d26f83b4f1a87aecaa347137f77fbe71b47250c4b97b64512f58. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC10500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d3770e4abd822f441179ba9f3e306e28037a5f9ac864268af18018a2ee3775. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC10500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ead867469fd4b4f35e44cdaac20484bff85cdc3f62ad5c4ea894076f2e2dba2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15909655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5f1cbd49fa015cbbe1a48b6180b9de912c0bb4fb26a0e19a0778dd1bbbec28. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC19989472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fe1a571664c71973efe771a6dd0f8e0d03fee4ab9d788c9565e431e4c26ec8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC10500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff064557f3331a83e07683503fa67901b771d4c2203098a915b9e4943167f9b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC10500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610b04360b3fa487b6b9e0f99eceda27226fca6b1aa8eaa9475d2c58df686057. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15608191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c851d9ebcfc75416a4bf5a45e3a3617530e311b325b922de1b3349a08e83754. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15608194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bcbe990d3d11b1eacf9ba7f9e746d9a7e44431ddab6bdc5606cc169e949b1e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15708526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1847cb9d51f509c9c570801b90a188f29d7279941fd75c3beedab4fd55503a49. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWWW0131229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1198940888900012946605bb9da1cf4d33ebbc11e9900b2f2e97d4be91350ef5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15809247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203bd274dddb6e2d5d03f6cbce6556edf911e8ef97f26b3a239370f80df80c54. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15909246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc416c862ef1a19e42614d7611e64ef377a96488702092413c2adf51a15026a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15909621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ead867469fd4b4f35e44cdaac20484bff85cdc3f62ad5c4ea894076f2e2dba2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15909655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a814f790ac1747f0fe193c4022c193e2e95a0fe2faacac2297ebff92f58474c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC16010593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ca826a061bdc0ef1885769baaa0fd73bc1ed0e36ed6f170a40be600f2bf339. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC16312171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a4441762f7ded3240e1762152177c3a9fbd7594413a5124209ffc19f545dc9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC16312170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549ce1c1d2146865d4ed9211e525df5413eeef19842c518af07cb7ae8c396a47. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15507874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3b14030a01eabcfb0ef1e323be8b2d85b6b3a7ed3733b245d62b556a9b5761. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15708433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5def45a908051eeb8f0abd6bb42bc4f1afbce2464f75827ba0c2fdcff519425d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15909244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60792cec36f69e0bbe1477fc818afbfd8807d5b37a12c39323bd2932e5e3314e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15608193.
Everybody Needs Somebody - Single Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e7a930912e842f4b9045a44ae951f001511e1ca5d5efb47c9f8e4fea5a211f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15708436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829c1167b167f2db84f7d85422b876cd0cd0e4545c57297f45e9783195d5f32a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15254899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb08eb91effa43f9237613397f383cb442581c12cc3e2bc01914e4cdafefcaf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC15708527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bde110fba1f538d678122405cef68f2675cc4ae9ff52381277b1c6b03a4bb3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWWW0131244.