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 0x6938d8301dcd9609bf345c26ade15b7fbc67d53fe9dcea8e5eb0ae6e08726d33. 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/472988e7-6091-4e19-85ed-11d5cc9f85e3.json and https://artists.proofprofile.net/proofs/artist/472988e7-6091-4e19-85ed-11d5cc9f85e3.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 0x8e549a6fe4e088ad64aabc215a84accf825d6d42b6bf8f4680465ea4090ffe34. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZGLS2356277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ca08d3bcddde5bdf344f53be219431422c3a3445beed85ea5abc7b1dd25133. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZGLS2351023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53725fcb0ac05445023ee83813b578a42c9012e00a626f9d5fbbff0446ee737a. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZNJV2316321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62c88ce6ce4350576235fd0ffe1b7dac9f9717c6eafdbcdf1b49dff27b6d722. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:15Z), 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/QZTVM2352353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb390a9c68364e84615a1f0b8a13bae8396e198e1b5fdf56d7c569c473128f841. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:16Z), 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/QZW9L2372145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69b31ce53655fbc94b31289af4b88ce93b802cb67d45d696bfb0171584793d2. 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/QZW9M2311062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf72e81f3c349dab833be6c83b8abb113396fb51b73100609f75e4ab414872b1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2480182.