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 0x8491fd73c76a06e9f437b331106c6c28e670eb29aa3c267798dd81fd2cff603b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58efa8f9-44ad-4f6a-b765-cb28f1256987.json and https://artists.proofprofile.net/proofs/artist/58efa8f9-44ad-4f6a-b765-cb28f1256987.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 0x6706d64f9a73f2634bbe5612df3c5769bc630e547e39842de37a1d1cb63c047f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:07:15Z), 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/QM7282016276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec8a565fb57e748b3aaa1f2d06580360010292796fa25b795c97e608a2fb9a2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:23Z), 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/QM4TW2168436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ad3a0dfb7849cc83fbd47653e3f64e8d091f11903f82840738e33bab6d34f9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM6P42139116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0379feadbffe0c3259a0fafc55c6ff43737740d317966c5bb6fec3e1367be4c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QM6N22265435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7891a299ea13620294a9cd90dee69a328663d2c73a75249d0f3998a228c29480. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/TR0532415805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b45fa7bf071fcd6344a858eab8aaca5d1abf612342d922e9af99756423e60d3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TR0532415861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b662fe5ffd5f3415a1ddc9cf60730016f50e2af1467bdb3d4a6b36506bfea46. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR0532415939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4e325413911f9f6399c40bb76907c1a3076a4ee1501a3d984e68e2f78ff1b5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TR0532415974.