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 0x351eccf5db9ceade8e925a0d1a643c331928a7b2fb3aa4f55f2dde07d4a9c111. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f87967c3-8a9c-4cea-86a9-d90f70a98e4f.json and https://artists.proofprofile.net/proofs/artist/f87967c3-8a9c-4cea-86a9-d90f70a98e4f.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 0xd5161b61520a16fbf2ecc89cac80288b7dce183aee51d69915c1aff85b270019. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:18Z), 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/QZ4JJ1614383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e830007367709bbd6d0558af174571582f7e3cd20783c7823d526cea472f93. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:02:00Z), 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/QZ4JJ1614386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6edaece8c02c9cfe5e7043814dd83e87d02c02c4659d3c12c8ff7b52590a15e. 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/QZ4JJ1614389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505e76089ba596b5cd68c2188a398950cfd24a7fcfce9187f3b8355b835554f9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PHUM71900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf42e2e6da81f0df9a1cfba072e3eead50158840e68a9618c0225d1a6771e65a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/PHUM71900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c5862b2d3c10e141e4aae5de04724dce15ba53664cb8c8f1fd18837ee95d6a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:49:25Z), 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/PHUM71900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814c1010ed4b9c2fdb11411b7ac7447c009869d8b69204e0cd3b55d3b1faf7d2. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QMPKX1784865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb947c72fb38e73d5afcba77c6fe7959f4cf5179645e0743ee40fe9676501c5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGWX2007248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64057e8f1f27a0292c7656a1ba5b9c4be97379d4170193dcf98c67f7a18179c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FRX452562111.