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 0x3848587ab93ff3a08b7b3e6ab9d0df98f7e7567dc16ecf7a04271afe9c1fdd1e. 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/5c35d885-7b10-42ab-a5ae-10bb969878f1.json and https://artists.proofprofile.net/proofs/artist/5c35d885-7b10-42ab-a5ae-10bb969878f1.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 0x1aa42322a9d96d9aa7773289cea5f6e32747e0367cb2a0ef5feda22babae231d. 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/DELJ82075954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8777bb3719ed0055f639d434c4039f043c4e0b3b433ba073fe9f177d8d4e91. 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/DELJ82047718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9d36dbb67b63c1657458b4476d4c71a7829a49c33f8c57ccb61597d03175f5. 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/DEZC62167720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c98f6468fd725c4e163da5edfd081c5ff120b6cc014103598b00e330c3f254. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:02:44Z), 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/DEZC62181500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5057548644dd46e165f6c1d0c17fa984b9d1151b9ba0999f9f917395c659d4ae. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZC62181501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5608627da951e209fdd483a38c95213f8b0261836b3baf106ed6a02b71a31b9. 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/DEZC62181507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1711cfca9cdcd81ca87faedfd409f96b075de2d89e6c1cfbcea3f85472d0c88. 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/DEZC62125548.
Gjumash (Yesterday I Fell Asleep On The Sofa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1426ef124c711d3a1a737caae6519ebdeee6b687ebd960219761ec1c2f3316. 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/DE1CZ2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe741fbed42294f6b066da646836be87ff8340cc19c96a91c6b877b271b140eb0. 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/ATFV72207107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f41884d5e8a56ef7384517ad26b82474d33f8d48d8da956ddcb060e51e79c14. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ATFV72207103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804a8f092f6d25f22d06ebed32e18200822bec57b314222123c40648b9f04f5b. 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/ATFV72207109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90777ed74dd8860c82210d378e7c053861886db3c57b2b579824908db410529a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATFV72207104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761a631fe8a2887ed8138fed4cbce04282534215fc4a7727f9147bbde26e7f9e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ATFV72207101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8049b10c9e28e6d4427403af3a9bdf633609cc7bf2b0c6f4b3f18c9f685593. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ATFV72207108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90777ed74dd8860c82210d378e7c053861886db3c57b2b579824908db410529a. 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/ATFV72207104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2a86b5921bb8a3f5074aa4a3c2a1e349dd368955642791f0d893897f3893ee. 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/ATFV72307102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f1e29cd8513d01f802b87626304af8bcc568ff687f435a8a38517a6857577c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATFV72307104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578e0e1984728db26fdd403ac476d5ac34bf549af6c9cd59e580529dd904460e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ATFV72307108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf701c94144927a8ddff9c62e6e10d1847ac7768974a8e1ae076a74ca117c4d53. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DGA0P2355143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc303f974a01133007c96aa7d6227a8b185c94aafd8959cfa9cbec5f0ef1a9a78. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR2X42507734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efa4666ce7d4b2260351873ed00f71fce8e30c9b7c35eae9c57fdd7d9328941. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR59R2589501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b3859a826d7735984ea0ac06be600d3eb94a95bf11f55bb2aea7268369cf23. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:41Z), 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/FR2X42592060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efa4666ce7d4b2260351873ed00f71fce8e30c9b7c35eae9c57fdd7d9328941. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR59R2589501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc303f974a01133007c96aa7d6227a8b185c94aafd8959cfa9cbec5f0ef1a9a78. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR2X42507734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7b17c52a52d2928867a1ccd192103db304c0f3b0152cc3e0a0494639317a05. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DGA092429068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920e9823b54af9f5c684aff0ee5ed29506e9d08faebbc6837200a44ee1f39b4f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FRX452470972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1969e2405dc306361c5f2c8f74bf1d2217cafd8382944505df9fdbed3baf16a. 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/FR96X2593496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b3859a826d7735984ea0ac06be600d3eb94a95bf11f55bb2aea7268369cf23. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR2X42592060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486376e8286a5ef1f78d7175fd9d2bd4b5931a768198031857d8d8326c660b40. 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/FRX202247147.