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 0xe4d21880e9f09bee22dbd4a312d4e23f935417552216eb0bfe143f57598c99c7. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f3d5e6c-7b61-4ae8-8196-847d175003d1.json and https://artists.proofprofile.net/proofs/artist/8f3d5e6c-7b61-4ae8-8196-847d175003d1.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 0x643f712f5a285d4e53c46bfa6cd7083a09f3300edff9038019c9c143ed0bd801. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:01:13Z), 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/QZFZ62218719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10993bb15dd044723943439910b66e0ad13ce8a94c8041e9d08d6c944f4f419e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZFZ62218720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecdb719ac093f847e3e269d539f55d5e310f3c70462b4513a4043fd131fc8c6. 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/QZTBF2332047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ab18cef8ec8c9c5c8381c85bfd1e435d7a4068504f9314110c695bbcf2fb99. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFYX2390971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f8e58f3d4ccd53b0b768f6579c2f0a31c71511a4afc75bfdcc39f3f5fa3a92. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFYX2390972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45e79a2215826460dce6d6531dc03d0171c57b16e8bf3d626645097924266cf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:58:22Z), 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/QZFYX2390975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e743d176ff9fb365f3a4d0dded0b1752d5d82dc5e6494179b5a88149bc0b70a. 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/QZFYX2390977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79f8a538b7802d113abffeba4d9fb141ac581b102ad9333c8cb3158c47724a9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:58Z), 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/QZFYX2390978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaae1e28cd9bd06453841b3ed0ac41d3d0b97272c0e034f659df468b66791b18. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:12:01Z), 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/SE6XW2419335.