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 0x0fb790a7c184cc1de3297840fba9ca3db5d8b3dc813d98edf6a0019976f72293. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75286a96-02d6-49e0-96e7-994696a895e4.json and https://artists.proofprofile.net/proofs/artist/75286a96-02d6-49e0-96e7-994696a895e4.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 0x9f85bf0bfeebd03c5de051ec2e4387122745bbe423d7a9471c6f01ca5efda2cf. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:54:56Z), 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/QZRP42319767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba3c7a25bbd03ccbf2d7491a79cfed7c0bbfa1eb5ea1058218fd3eb9f691b7d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFN2325802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca0eb73accbef11df6f4bba3e81eaf7a671eb4faf4d4dabe148465ee7df63e4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:29Z), 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/QZHN72470952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7ff7b70b693634f6daae3e8ce2f6ff32fba5a33f9629645156105be0004bc4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CAQOI2405876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c047a9db34244ffb7873c74edb4a303703a6b89aa914c1edd0eea0b58bc23b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWT2456188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7044f382e629635078548870040d258b7350b271bd6a7171da869b2113bdcf. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:56Z), 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/QZTAS2477268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a24d554ad9a6de2a1a5bd507e7c1895246ca137ccae7eb3df16cf9c98b24df. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZWFT2493167.