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 0x77af45b34a64179a8421878979a334ac8cdf036d953f679883a230ee7205cacb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5adbddf-e400-4b5e-b958-80f7435c7bb5.json and https://artists.proofprofile.net/proofs/artist/c5adbddf-e400-4b5e-b958-80f7435c7bb5.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 0x70f2551c36f48ebafb12f4b125d028813498473c4c6676ccf3e7f9f2cdbf1089. 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/QZDA62479277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba47fb168f4b3bdfe0f7e34ac11c9069262358f37140da4d00f729fe9e440a6. 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/QZHN32437031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15a2bc62e93251a15c0fed6ea5abfbb79f99b3047aa609dcbb4d947d63e4e60. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZNWS2476833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c6d5e95d1cdf223a2ef434417ee0786a8519e443b3a137ab602c9e1627b327. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:01:15Z), 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/QZTAU2490425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e1927be61be0fbae6ec00ffd801f2fc86751fefd23b1eeac80131fbd51bf9c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:39Z), 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/QZWFE2404498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d64f2442168907a1d4c3b9f1cdab9c5a0d3bdca7d80dd04f7aa38fd59d94d99. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:09:47Z), 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/QZWFP2410790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad5fe57970c6b967ce69b44303bc438ffe7baa9fd87496b5b76bf33f176df14. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:49:14Z), 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/QZWFP2410792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bd8f1b180b7b9d63647e4375d2a0f3b9aca3d78722cfeda613ddddc6f0b4ae. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZWFP2410793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf4e9de8ecb234dbcc06cd2590cb1357eea0eb0b997b71d74a2d8aff3d741ab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAY2585919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a6bac53c0b8110173ea3ee30efa6b4a0e0a1b7d22141e04a6bf7a95cb0e259. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTAY2585921.