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 0x1fea14d2e9525ace4d24b787ec9c8c26ee6afbeda384b99d71fac21302c14e49. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/725a83cf-7e48-4d9d-8cb6-676c5ba163bf.json and https://artists.proofprofile.net/proofs/artist/725a83cf-7e48-4d9d-8cb6-676c5ba163bf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Castlevania 64 - Introduction (String Quartet)
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 0x74f85df1c6d40f596a2df054144b98f91995b6ccc9d0f4f9ee2fe6338a6861df. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZ4JJ1725589.
Paper Mario - Mario and Peach Theme's (violín)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ff095179b129074588d7847a9da76cb73a9b02fb866ddc924243f8d8a3cc71. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZ4JJ1725590.
Ending Pokemon Black/White - (String Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801461f044133bcfd71ca142240ef509bd05016ebeb6bb5db866d4cde5b57818. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZ9Y21766855.
Pokemon BW Town - Little Medley (Violin/Viola)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6687aac2790cba983f36e8c9d9de0ba59ca32f29cca7700bb6f6a22b145631ec. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZ9Y21766865.
Folsense (Professor Layton & the Diabolical Box)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e19e211803fd2db129edb0ad38c3cb90bfe4340ba01882953dda782ae5b9563. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6M1920507.
The Dark Forest (Professor Layton & the Diabolical Box)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edc1801d7db212be15bbfe927c869cc053e2e10a55f612e015f60346b1be20b. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZK6M1920511.