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 0x420f86a545c34695874ad1c06bb89e1f342314a909518eda86879b3d21002312. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72554bb9-c6b5-4cd9-a169-95571a1e4ffe.json and https://artists.proofprofile.net/proofs/artist/72554bb9-c6b5-4cd9-a169-95571a1e4ffe.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 0x429049ec5180ab4d73571fc9e1acb19fb614515b46101d17dabfdbf144bf0e3a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:58Z), 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/GXF972481012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6b7266cd155eb0774f086e9c17207f274815e64cf42fec7331fae54cf6b251. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:18:41Z), 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/GXF972403635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a103a935a312912fc860ed53bc6575145c66d890654d5ef0d82b0ee1be56b2. 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/GXF972474449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e14b13781c3197d682bd22a45dba01e0c287f927ae1f3df48a28a3755c65e7. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/GXF972425576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58a5d56bd6de96da26328a074d39477ab1a7328112bd32f839023b8bb8a8b98. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:02:30Z), 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/GXF972477469.