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 0xea98072b73c0fbb9d701393739c06d32a4df3e88e3b5d060ffab8f583d7e042d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/829d1bd9-f546-4dcb-a3bc-f5f2f17b86dc.json and https://artists.proofprofile.net/proofs/artist/829d1bd9-f546-4dcb-a3bc-f5f2f17b86dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Song Collection from The Rose of Versailles - MovieEDIT -
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 0xe57bd15e4718cb4e8edd906c807963691509384c6365ac3ab7432a594667ba5b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPT552500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eff0acd80bc9752e16ce5764e70b3f3d10842a3f9b6c351f7b28bc4ff282d5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPT552500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20964717fa7151eac08011bd8cc1dee5e1a8d6a43edcecd62c2a6f7c706b30fb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT552500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1c429ff290a8836a0e94766157dba6b078f1e1244a79b4b74ca9d5a6466dbb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT552500043.
Song Collection from The Rose of Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd3f6136d6882009310e8ee1019e7ba66fa6a47989ca9883144781093ba6450. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPT552400649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fa2bfcd41649461b0376e4f427dbd16aff68452f20ba85bf61711c6a2d6d7e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPT552500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd3319610a8b27e2c696db810b605146d71254f92a35f6a83b755e09d78c634. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPT552500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83163242fc6d8e5d88c8036ff4874617905f086e3ce0da77412fa93b8b0216f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPT552500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57bd15e4718cb4e8edd906c807963691509384c6365ac3ab7432a594667ba5b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPT552500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20964717fa7151eac08011bd8cc1dee5e1a8d6a43edcecd62c2a6f7c706b30fb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPT552500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1c429ff290a8836a0e94766157dba6b078f1e1244a79b4b74ca9d5a6466dbb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPT552500043.