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 0x393fa15178712f2c2c24e657520920412e726ecd6dc2373fc41d16cd28bbd875. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15192555-7d28-4dac-95ea-4de91004a67b.json and https://artists.proofprofile.net/proofs/artist/15192555-7d28-4dac-95ea-4de91004a67b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vocal and Chamber Music (16Th-18Th Centuries)
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 0x0e6272413937ecf3b868e14299fe547ab5f18cd626bb597b4c700c723597b24e. 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/GBCJG0400536.
Pieces de clavecin, Book 1: 4th Ordre in F Major-minor: Le reveil-matin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5d0f7b3933b0a8a0fab1b163bf37d396997885595368d63431a8784365b479. 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/GBCJG0300346.
Ring A Ring O'Roses - Songs and Dances for Children
The Fairy Queen, Z. 629: Act III: Dance of the Fairies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7468da7c8ba5baa6f928f8852819ca0a91b57cfc8ffece2a0f7680f932101602. 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/GBCJG0300337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5d0f7b3933b0a8a0fab1b163bf37d396997885595368d63431a8784365b479. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBCJG0300346.
Fairy Fantasy (A) (Music and Verse of Fairyland)
The Fairy Queen, Z. 629, Act III: Dance for the Fairies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7468da7c8ba5baa6f928f8852819ca0a91b57cfc8ffece2a0f7680f932101602. 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/GBCJG0300337.