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 0xb775077ede374efe84d9bc5ce867f77a831dd0ea239612e2d59f1d72adca1816. 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/b00e7fee-04ce-487b-bfb3-012032e25d7b.json and https://artists.proofprofile.net/proofs/artist/b00e7fee-04ce-487b-bfb3-012032e25d7b.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 0xac8199df7a56756f107525fb7a47dfe90ac0e2309a24f986a894870108be4b4f. 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/BKBSS2300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0cf235917b66108ac6c415cea74893f65ac657a6b153fee9d56eedf41333ad. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BKBSS2300266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41aea51a6d7a037c2c50deef36411cedcdc8c15bbbcc416c963ba1538597f30. 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/BKBSS2300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f170ec70fae138493cba15ba1c8644cb53e9275020768c307a942d2b74e072. 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/BK2242401383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373f316e4b860cdc14d43308552609a8b2fca2098c750d935cbdde8d776e1434. 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/BKBSS2400574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb636492e082287b6e1c50dc265a0c8268ef601f7ddd2962b889a77fc7c47b6. 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/BKBSS2400505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754939e3d9345b1c9e54096427e52d894d5cad131a06b50d38f5d2a34f5e1e65. 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/BKBSS2400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c944c38132eb6a47639c2f3ab342dd1268fc0820bb4a72111d16efd8a0ae97. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BKBSS2400385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba07c7940873aaf48b52cb16a8cb1a0dd9d739dac7735b4d450eebddd6aac11e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKBSS2400705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9455db3a47604b815baff2bc76c9f31d4c54da31051295c6eeabe91a9bc0ef. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BKBSS2300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec3a6d853fba3705c270c247e9f3fc959ebf20d7dc9b137cee1f421e88c2d1a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BKBSS2300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0da4e625eebe0fd78827424e1f2d4ceb9cad9afa40f9c8c8a852ba1b24e4b5e. 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/BKBSS2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b17b421c434d821e96bc59665119ecfdac429073d0ef0a29a13c5ebb388ba7. 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/BKBSS2400840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e2400bd46088a39611750d7178cd39bd226eb17187ad8275ed61abdc0038a8. 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/BKBSS2401044.