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 0xab181ea6f9b77f736250bde1bea12d1c82c721de325402efdddb9c2de8c29f60. 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/a0870bb2-3084-40b8-818f-6183b6c21adf.json and https://artists.proofprofile.net/proofs/artist/a0870bb2-3084-40b8-818f-6183b6c21adf.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 0xc73aa0214e38d756454a55f21cfdac5928b70d4d53d0cb22d3378a85d706f32f. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/ESA122475331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b8c9fd3908de2154badee745718848659fbd18d958c100e96e9482b1c9db55. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:04Z), 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/QZWDW2472170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1344ef328c359f1256edcc278d3c0d56499c14bb6418247cb2d0ec39b2df757. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:24Z), 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/ESA122498537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73aa0214e38d756454a55f21cfdac5928b70d4d53d0cb22d3378a85d706f32f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ESA122475331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6fe430b0349dc3f7cc17c6f72a240d548ba4eb6cc4592e9c0ee7e3331ecf3d. 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/ESA012426237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f545153f05b61844fd97a3b48a5eb76819058cdc396d87f994a83844e7f07a7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWDW2472172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479236d2d97e08f9b8ca7ac1571c507fd14eb527de5da15688b2dcf9cf6ff693. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:07:28Z), 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/QM7282575620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff48e9cb9f2c3f815f1d40204f223dc42e2235805f701166b6fb3d3a3469964. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA62538147.