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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d030d1deca98de02cab0f3194332d58776728b92043282c22896da63c4c468c. 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/3fcaa0c1-5c3a-414c-94c4-70869d4ba382.json and https://artists.proofprofile.net/proofs/artist/3fcaa0c1-5c3a-414c-94c4-70869d4ba382.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00227ed3f920647d6bdfd90b43a47f17ef50c4f13aca2b1ce66c7462008a4a8b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PLC062370708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f1a0be29d9dbcf587eed0ced4dd3de01c084d2266d0f84b8db4d9ed15704f1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062374021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe130127f49a4ab10c6cd69e39baaa9e23f6973592117543291611840fd129509. 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/PLC062401525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf679f5c9566c398d579fa3cb51812bbe5a4472539d4f42d28cf82ed28ddb8dfd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLC062428540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f733b9595303daa8e2d8538df87a9361e8b1d7c1af70554be1d571493ab302b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLC062431689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c37284b227e7427e30e1833588076cdd0de670804ebf6775155534581a15791. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLC062501932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f788a1d349ffb7132222742b04774886aa846bb77bd5158e289ede77207363. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/PLC062501933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61c34bac91d23af8a8b9a50b0ab1992adf2db468b02da3e58888c73e3d2d69c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:18:19Z), 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/PLC062501934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa175cb47a9ec6436bfb1751d26b8bc24ad8277b1c762fd206d4cc41416e359. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:20:04Z), 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/PLC062501935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00227ed3f920647d6bdfd90b43a47f17ef50c4f13aca2b1ce66c7462008a4a8b. 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/PLC062370708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a8a424bd9ec1a505939ba9090e6bb9f726efb56c966b6054e77c9852c77550. 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/PLC062374614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24ebe554f3844e52ee4cf67951768ffc66e3620690bf383a5a7e205da070f60. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLC062501937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec3331cd92bb55adf827980784017b59e346d38aa824b14e01ac363022514e7. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/PLC062389270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d79a900e7ab3305afd2d678a736b008742a0f42f2864a7250516e67adcc19f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLC062407559.