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 0x275bc66970930daaecbdf1d659a577c78dfa5c0238a9b26062f4957cc57322a2. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba03e069-8296-444a-897c-59683b9b761c.json and https://artists.proofprofile.net/proofs/artist/ba03e069-8296-444a-897c-59683b9b761c.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 0x188d0feb40bcb8cc00456ca2257630f08cac661a027f6c780e5f96a78ae9cc22. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2P1617708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fdb5ee9b1e2b212af0530652218f501b42bc492105b3728766a6d939b3f484. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P1617709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7eda484439d4550fa8ddd695f98672d5994000e6c61470ebbdae084196cd181. Chain 2 (Bitcoin): anchored in block 957737 (2026-07-12T18:02:09Z), 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/USA2P1617710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6ea5b2acd0849095eabbf09ffbc8a4960e9a67354036a78cc00ec32fa5bf6e. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USA2P1617711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18c9af387db6cf9dedc21cc7c9ba33cd97dcbc0670ff54cc1d4dff69ce8a37d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P1617712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f6e324339c9724b94e0aa6c12fe3d1706b8cd3ee22389331091eb554825e2d. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USA2P1617713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a02d6b0cd2ee1c7b9593d911f6aaa7c3cc9dc3105c531904474a5d469b8ff07. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/USA2P1617816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52345613c62e3d03a4624bcf410cc32f42831cf811057363c19eb67600484b60. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA2P1617797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bd260f91fdbf4e18580d509f653f16fb04b5e8b0bedd77e4773425f1cd48a1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USA2P1699377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442fc13a4911d4b094291728233c7bcf1b3b2ced04da6badcf06b671bd06553e. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/USA2P1699378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80548daf05cb32469a8872d5a4e6f74ac191270b2caf0d585a81edbb4d63bf49. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/USA2P1699379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478fcd31d51711935bcaac7bb79427fb4bdc6f532fd8c2c2294e72adebfb1472. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/USA2P1699380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb5625cffcfa2e348784d0fc8401d29d46e5e0fdfef8a24d78b83c16f650b5c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA2P1699381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4f0dfb5e284fd7527d81b3ffb257017ed5f17af0f39cd2a706d837fa4e1ff1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA2P1699382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935e5736607a7a003ec313311cefd7aad218c716f79228583754c4c270faa4e4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA2P1699383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308e3b2cf5d63a96ba6edaf81ea7c14adf46d9461ca5b13a862a8d7e773cfe66. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P1699384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ef48c0d2e5fc686b79339ff698bd32b63e1d074b4665ed67824f39e832b14a. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/USA2P1699385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5365ebb43cde8cbe1121f44ed950f141db45c35a888288837ec840d9d70d791c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P1699386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9000286eda0dd1915f2e32fa321e10ab67a56875042ab921a676febf16ae95. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USA2P1699387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdf0ee741ae601371d5bd4f5c646971516db87ba324b9f6f4085931f8e16358. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P1699388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6764bb37d964686b566a4699a30086fe6eeabf9ddb8e0e516f1a1160d3ed7b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA2P1699389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9d4193162f71b63f34fefd7b921edb0ac25633f42269c2952d851dadc157ee. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USA2P1699390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97361a2a409b3336a4cfd7c9f900bea200e4978874bd64a7f60f603066517fb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA2P1699391.