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 0x6c9596e0e75dcd8adbced1fe8805a059f87ceee1a28193c1b1c3db4cc0c90a0e. 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/d2a1f343-6f45-40da-851c-5bfb38fe2641.json and https://artists.proofprofile.net/proofs/artist/d2a1f343-6f45-40da-851c-5bfb38fe2641.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zelda: Breath of Cello (An Ocarina of Time Medley): Title Theme /Termina Field / Kokiri Forest / Song of Storms
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 0x4cdb3a8829a4c4bae24c6020b293e6e568cef25ee63f33cec2e697ab864e7c7f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CA5KR2179243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fbdd0be75e939ea94abf00c5e816aa2b9734cc11a470cff62233133c4efb50. 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/CA5KR2179245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4769924d6f436eec5940f65cb64a05cc4f11424c5939c7a6c938aac06460c581. 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/CA5KR2179244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f3179bb1ac7de1b5da5991237714ad6766ce360d372ac891eeceb506f59b7e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA5KR2179248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeefbff8dcf56ef879dcbe309a04ad7d15ac956b8cb34e9d880ff0b63d6a1e1d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CA5KR2179246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6a50cd75e22712e03bec0092baca08d9066984d3d6b6b52240d2e84ce4639d. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/CA5KR2179247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc6787bc6d7932bcfca41d1ae82e9e2676f813fdd4649c701abf88dc3d64989. 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/CA5KR2179250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fe606cd8987090a5b0e1ba2e20e1ed8e8672eea6f58cbefe15a7cbc6262bae. 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/CA5KR2179249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40454c78812e2ab7246f54b0845c9bcf8c950a83e3621cb93b42d64feda1f132. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/CA5KR2179251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e865a187a496e2dfedee6ca125997e91b631c195a8ebd428818345f5018239. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMDA62160561.