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 0x5072f8464eb656c559b02753e74c7bb7c602ec71a697869fe32d29d2fba6dbd8. 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/3613269c-ad52-498d-acbf-b04652be3c3f.json and https://artists.proofprofile.net/proofs/artist/3613269c-ad52-498d-acbf-b04652be3c3f.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 0x938f98c6dc65429c429d7068ec2eab0212d045b2599a4432fc3a8627cd8cdabc. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCABX1435799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f993dfc17d23d449ed59a498d7a013676db1b0d837cca71795abf0353065f39. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCABX1435808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3103656294ad8cdd7563a1e7d1816c4812e8a83d09590a066a1be34b9e7a2025. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCABX1435810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf250855848a8a222163644e76ad5132c7217e16381444ab670c1dbe930c863c7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCABX1435811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ff89434ec9c6dc3f109675102374680e8403a8ba9d21e1ea56a4288dc88858. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCABX1435812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f7c7a03ea4d103b7c76af473272b887981e418924953066fcc2b2f7d5a234c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/PYB311800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a81d75ee8276bcb4724cbff12bee5398d09c44b0d99c01b8752a69505bca58. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PYB311800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16a496c57ba84b16636c56d6521f2c19dad256b08013b6575046a9f333fa1ae. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PYB312000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9d667740ff708305fa8ffbf50d719f4295d8dfe7d02fdaadcce4fc3c0c6d55. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PYB312000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfc7780463afe140bb0e433edcddfe90e098df5104be68040f725ee3be3556d. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/PYB312000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf506b37faa5aeedc721db7b54b471dd0b380c85cd8ba355d8b1c41c24f8bce6b. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/PYB312000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf36445515b7b8a5d8901d721de2855eba167fbfa19dc51045fb7e1588d0b4a9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/PYB312000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b838750884926608196fe9c7452f0b34f74cae987434b0dcb788cad0825a7db. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PYB312000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf028cb3341d67f8a02bf9e6e3fbf453fc775f8365bfa6266f0b4102325f07fa9. 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/PYC842201126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99987bcd3c428de3d2593b112b40177128b9675d85a56eaaa428f014d1df081. 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/PYC842201127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1656f304908a3b30fd953aded10dbc9cf865572dbd90cf2f3f98004533558ee. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/PYC842201128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b17b1b7b4efab0674d3e308d9e7be7cfdd0d039431268c971010dd5100c4e4a. 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/PYC842201129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc67c00c8eba5b8206c950a020c80bcc4f04b2e0a5bc2f0cf603b1e200ba94bc. 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/PYC842201130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee67d7d136e5570fdd9e51c437d07d36c9319fef1df350d9fdd111cb24f131. 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/PYC842201131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe9e435ad2cc454c43099e3830fa57d78bfb492a26e22d876d7f409515de56b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/PYC842201132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e35706d79c0e455df275624819597ea42071c4b4e57f814c575fad9f14422ee. 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/PYC842201133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddda15d734ac1e29ca5d84afebe3c7906ac2fc4490bbb054c4d846723318951e. 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/PYC842201134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64b09511d34e0096f6ed424008159d79971a5c7b3bd51c30438adfd0e9d83d6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/PYC842201135.