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 0xba6b930b69ead0a31af3fd116e9011c6b90aeb00f1f0415f4707b10a535e44c3. 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/3dda510e-360a-4b4b-bf8c-2f4d8ca40fb8.json and https://artists.proofprofile.net/proofs/artist/3dda510e-360a-4b4b-bf8c-2f4d8ca40fb8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Saving the World (Narita Boy Original Game Soundtrack)
Dragon (Narita Boy Original Game Soundtrack)
Forgotten Forest (Narita Boy Original Game Soundtrack)
Riding the Servohorse (Narita Boy Original Game Soundtrack)
Techno-Sword (Narita Boy Original Game Soundtrack)
Big Narita (Narita Boy Original Game Soundtrack)
Synth-Sensei (Narita Boy Original Game Soundtrack)
Narita Boy Theme (Narita Boy Original Game Soundtrack)
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 0xbef39ce83a671460c2e456ea313e0961fae320e44f6a8037cfca5916d89b81fa. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES6102000806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3f3530a2ba7764d3c84481763bfd662cadc90d76e11a6391914159f832f601. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/ES6102000807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b31b0b0a5bee4af8d4dc9e717b0a702acb7cac522f6469f396ae108a889c053. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/ES6102000810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec83d187ea7a99ce80366d598adedb6fe29d51a48874f25e62964f3bd70af69. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES6102000812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881132f5f7ed3d8f227bbf8c615482ec1de4daf380dfb1913623934eb58dbda1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES6102000817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502fe8a23f643a0adda3ef6edf1636a8f9adf97eff0fc553ba6b64960200b381. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ES6102000853.
Trichroma Sunset (Narita Boy Original Game Soundtrack)