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 0x2f6187b3dd3accaf5fb86e59695bcc0141edccb95ca4b23cc42d3bae76480a7f. 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/fb54aad7-e421-4c4e-acc5-eca693f29afb.json and https://artists.proofprofile.net/proofs/artist/fb54aad7-e421-4c4e-acc5-eca693f29afb.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 0xf1b0cc3628e81593d9699c6f7c7a1ed018398625dbe09a7d6961c54ddcbece5f. 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/SE4RG2307627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311d2a618eb3daea0942d7981569bffdcd56128181a677c251e3c188fd99d66f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE4RG2305339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962b3a75c9bff19724bb08cf3b0723bdd81b3376b16943a3cfa274380fc3559d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE4RG2305340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce77193a938cdfd1c5a55c628ce51ccc94bc8d133cb4685a29a9e67ead4854d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE4RG2305341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc99b81b5076f6598efdef2c667e2af66f446a80945bf1ef91caefe1d689ace. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE4RG2305343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb75fbcdb4112ba26702f06c9e739c81252000a88863f78a39372c06567a667. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE4RG2304344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb614f4e31d225dc234824e56d2d5313f18f8fb528b59b8613dccce4caac6b7a2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE4RG2304345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d5446264709e2f75ab8565e6d0b0521a420280a9a15cccd3c5eca97b85b452. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE4RG2304346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019d4b8b6f2fbef0d99f8238a02baddda5dba5b58e404b723c8ebabc3b4e8062. 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/SE6RB2127602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3733a39e901a29f4577001959c6925e36ed31c046fce90fafb8c40a7c2477f06. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6RB2065604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce367ca17fe06716b8e757ee82f5514fcc0b69da5b7387f1226a02a7db73059. 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/SE6RB2065605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aeeaeeb29e386952d920283e097cc8b661d3052c31a9697262b83999eda6ee. 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/SE6RB2065606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634b65b2e2904fe981c2e447d4d3de10fe337343fc58f11c96f8c6f600b57b84. 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/SE6RB2046701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0816354d1933c359f2602416f07b290a08981d86e05af834a088512661b432ce. 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/SE6RB2046703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eacc8508f6d3bca9ca1b15d1d17d29507b67e1d4a844ae053c25a0166674f43. 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/SE6RB2046704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a285b5868c5fb518ad4af0a9de4437f412008d05eb6987007c50b912ea2abf2. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SE6RB2046705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba216bcd4adf8e0c0f8033de32be37cb847de22f18b58e00e0872e3ab5abe57f. 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/SE4RG2081902.