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 0x7ffb47e8b09efbd3a21c83d3a169b793e69f5c0bd2e24bad5d6d00469496ca5b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43323a35-83fb-46da-91f3-6ba6cd075c4d.json and https://artists.proofprofile.net/proofs/artist/43323a35-83fb-46da-91f3-6ba6cd075c4d.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 0x82c8e4275f2841ba53122a77bee55fff7bff23a9095bbe9771c0091276feefe8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PT2EO1200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35efbba36cde09bc0c34d6b7c1d7e617f8bdc61bdb0c0e96839a423ad8edf962. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PTES11303401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a3f4aeba38c78d4450d1d465552042f0b924f7221aeffbe2c3fd923246b3a1. 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/PTES11308708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c30ad37862feee08561873bae77825c7663e6ac5083d1ce8beaf75af3491b6d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:42Z), 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/PTES11405201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723cc9e8f5f5d6409e06a5a0d40e43d1a8e2bc0c6519a0b760e29a47f7619308. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PTES12204801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c80197f22c3add28c631630bfcd1aadfb3c53902a378081ec10f20951c4b990. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:48Z), 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/PTES12310102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49009c617a5031a8831c81d94ff32095412edaa88e68b34d870bb51c94af2212. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:16Z), 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/PTES12310103.