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 0x5a082fc702ccf2c7c49d173a595f5143b541021690ffbe3fe0de1ba1c648ca4c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/368a0cfa-fe23-4697-8ef4-ae3d6e9be69d.json and https://artists.proofprofile.net/proofs/artist/368a0cfa-fe23-4697-8ef4-ae3d6e9be69d.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 0xcf12ce63b34abf788b1e93ba0d53721ffa7e2055974f9c69e5e0b084ff9fab54. 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/QZWFQ2309546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9059cb7ad81a99f743c23f5c02f8b541e17516419a61715e7671757e5fbfad. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB72462483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f04c6aaa6be1c10057328f436b81de3ef4c07636cf83d3a86b1150ad130e03. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFT2489063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f280cd6aa1c5234fa066dbc1d8d639e8cfd54083f8d8799731370f6a336ebbc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:06:12Z), 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/QZFZ32501065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5343f548dc3b2d215bfe30b561c4ceb04dfe6911ea20e66300e2f40fcf31c1cb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ32501066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89388d1f8838a719614bf89f4b027ff4e1179c0e095d84aef390814eea134cb8. 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/QZZ7P2473764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088996949d3a4f0d82e31b1eca4d38be4be82e2a5ae41f88f692fd7e13b20eec. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZFZ32501067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27aa9c344e75bc9bbd77fcae7209b03c1957c23d1e59528a0e9de1c6735eb74. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:03Z), 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/QZFZ32501068.