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 0xfa0aaebc81cbb30bf6c49ff87b0d29b6ba9b7b297283a213c8755815bde7f7cc. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d9e1346-29a9-4eac-ad40-1c394e91c972.json and https://artists.proofprofile.net/proofs/artist/1d9e1346-29a9-4eac-ad40-1c394e91c972.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 0xd9bb88b9c64ad351c097a4e7c201789645f1f15d5c0d2c11bd47ac194ab43ce2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCE7P2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cfbfddb0122d297fc8b52080cf1260780c19b0ab1b2d44226480b7ca9d8f65. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:30Z), 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/BCE1P2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df71a5d5c7a75bb0525fdf7b4d2e3df12f8603cfffbe5a64c59b7cf57be80ce. 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/BCE1P2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576153ddc9cf394fcf89bf0184f9637c08ab790eaa80134c0f51301f45dfbc74. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:18Z), 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/BCE1P2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae1c19568f246919d4019329c0fddd88d334d72a4cd35c60b7627b05e05a3ef. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BCI592400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a31f61b6672e2303a4908029783c34e6f8a76752100edf657c6cad2d48812bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2523110.