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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd58990fcfd7bc79203fe4626f7499878236c66fd2d9594eef6cbaef7ace01e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d40a62c4-b69e-444a-968c-568144a94a45.json and https://artists.proofprofile.net/proofs/artist/d40a62c4-b69e-444a-968c-568144a94a45.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c3c25a43f059b742e5ca00a7ca773936f16c329d854d160f04a39e26973381. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFYY2230896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c551501626afae725e1055bfe1bc2334e24e63530ace9e9dd21cfd847aa7567. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN62243696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292a14107b99082b7b6e662403452a38663121e85f50073c2ef74f0f65bb6183. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZPLR2248176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bf35d77ebdc7b3984c6239ab2c35b49e6ba76c19cbbc051738daf28e729df3. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZFZ22307279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc1fcc0657516e94a033d604924a16cbc7f9c311e51e54330b9e67766dc4d8a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:40:27Z), 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/QZHN32318950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfb74adb95e88bedd76edbe71bf13261815de95e29125cd5b8c512f8556e534. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN32318951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1d79452dfdf7c78f17aaac315ca900edd2a6c9aac3d8a20799fb24847a2f76. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:45:53Z), 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/QZHN32318958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d77ba238bc1d32aa24d46e089fbb0ddf7848bb6c96de0aa3ac5a81a63caf64. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZWFG2359014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3d5861359b2560da5ea0da3a52d7f513425f376a35c81302c7fea30543bb88. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWQ2464454.