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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7211cc833329becac50b9ff6ebc6d5b29bd1da45725981066d323d143db7537. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a82d623-7e44-46be-b8d5-4a2f8195509d.json and https://artists.proofprofile.net/proofs/artist/3a82d623-7e44-46be-b8d5-4a2f8195509d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
The Nutcracker Suite, Op. 71a: I. Miniature Overture (arr. K. McChesney)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb056a659c64d80d9d4f98f3d6cd87c56e08f4c1d46e0c41b2b0389d04f82b81d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EEHA11039104 — a six-check JSON result.
The Nutcracker Suite, Op. 71a: IIb. Dance of the Sugar Plum Fairy (arr. F. Gramann)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd906223c31c2ad623cabc2eb6fd27477e4e88775bdee83a6403b7b9dff6d51. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EEHA11039115 — a six-check JSON result.
The Nutcracker Suite, Op. 71a: IIc. Russian Dance, "Trepak" (arr. W.H. Griffin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f897b29c344e0862e7f1b8fdeff9cc27c0db8f79900236e60d84e08459c9a9e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EEHA11039116 — a six-check JSON result.