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 0x622927939d01e4790c592d882af5718b53fbfad280645837ba66d0c0a637031d. 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/e2c66c17-3255-47cc-aac9-2b0ea11c2e52.json and https://artists.proofprofile.net/proofs/artist/e2c66c17-3255-47cc-aac9-2b0ea11c2e52.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 0xfe93f8173f13520a1b7d22ba366d30e1edf596b7f51564313499ecbb51bdf825. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2018747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d7f0db09da2113944d0d793ab7127e20b60735a0f889e8a9fcc97e91555196. 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/NLFL72100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe80e55bd19ce456c1948fee14a1702baf0083caee1d764cbfe4bb8e1a4be699. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:57:56Z), 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/USHM82358293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acf1c6a2b9684a5bcc038adb5bd9f5dc1a4253ed2df32a496eaf4aa7aabd59d. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USMH92347125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b16e2ebd246a77b33074cefb795250b9cc6df0a9478a93fc4f00efc0dd6aa06. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USL4Q2313335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a75ca3697c2757d425fd603ba53846052ce1a6b774d3c23652b1168e0cce539. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE6HN2427306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe3f355704ce223cd56c0054de5a9f28a8517a0ced26ce8cbc7bacc775b2582. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SE6SA2428446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe3f355704ce223cd56c0054de5a9f28a8517a0ced26ce8cbc7bacc775b2582. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SE6SA2428446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02af2c27c045a155d80838348175b3baea7234c6670c3475fc7fb74fa37fea7b. 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/SE6I32429864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d0b0e54c08f6320c039fa1cb72121350d6038b9cf8408724dc91c76c596706. 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/SE6XW2428847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a75ca3697c2757d425fd603ba53846052ce1a6b774d3c23652b1168e0cce539. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE6HN2427306.