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 0xc4665851c54f97e840cd77fca6a3a8a79f3db058532075c3f58e441b92976bc8. 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/520302e8-97d4-4f9d-b952-81844a53cdec.json and https://artists.proofprofile.net/proofs/artist/520302e8-97d4-4f9d-b952-81844a53cdec.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 0x693732310629e2c9e6ed994fc093dd3b6805359e89d95016608e18bb2f1c3d8a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR26V1551842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6b5f799832a418a34d56e7e95be31ba266c57a859b07a5a5ecbc11a95a0a5a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:22:50Z), 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/DGA052015331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29da6a85b9c1c00a3c3fff5c3a1155f37b2781e2c94e677e45e622412ebcf208. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:27Z), 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/FRDLN2100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67817ad64b127c66290b0fde2a085c7ce3f9ac0aa6a164eba7979b4729fa9288. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRDLN2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edb6b8d843e754d74f6df7a48ca39affeaec386b5d85598b290ad23a1f2decf. 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/FR59R1938406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e95e7e12df7615ad4253ae61941bf631e88f741ef77f12116a5aff601f38c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX281731441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2335021099f210cf45d8f3c1fa3c2f937e8b504fa6b14201972c0c90a3eac8. 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/FRX761594238.