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 0xe560f2b77b3304b83fc3fff3c92998410299d334a4c882fb179b5179c4208fc6. 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/b0f8fb79-1cda-4bb4-a8fc-f2ea6ecadd49.json and https://artists.proofprofile.net/proofs/artist/b0f8fb79-1cda-4bb4-a8fc-f2ea6ecadd49.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 0xe83f054e820e2143c27cf501804001075aa5dd68009d09ef54b76380fc8b3aab. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZZ7P2424533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f152b64c8d7580ffaace7a6e16ffbc64771e3997d2236dbb9b66c7bf31e620. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:47:52Z), 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/QZHN52561466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4872ca339712aa031c06d37a285e8936c048e8436346d221b5bddda8575cd75e. 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/QZHN62593848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd006f1b270105d23f2ca8bf7c4671cc54e436cfb4821eb1a440230c7e76071d8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6K2520036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8870b5473a0b30c04f31401b1ccde9597155086393410114ed6e48028bb36d32. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:05:19Z), 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/QZMEN2504220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb17ac06f9b8307526bc9ce9a16c252d3cacfe124ba98fae34a4c8169bcfc419. 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/QZTAY2566498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc0b2adb8994d1b894784a76d64cb362b0c4f29bac03c581cb7c166e1c1feaf. 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/QZTBA2561962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaf5a275349e6944d420a4fd507f7e1fda4c1a9e45a5cc5208fe9a65abe4f15. 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/QMDA72574778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bac697eee5c7ceb94865ea0bf9297332ddabd5305721e010e6bf8b59957eccf. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA72599492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de21da546c6ace0ae069b3bba599a4673823487e897844aa2fc59db4509113d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:35:19Z), 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/QMFME2536706.