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 0x1b5f4fb97cb4bb0a791d66c5e9429a322b070099c1c58afed0a1caa58fdb583d. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6052046c-32d2-46c6-a07a-3fb5cb88f1c4.json and https://artists.proofprofile.net/proofs/artist/6052046c-32d2-46c6-a07a-3fb5cb88f1c4.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 0x31499b767a0d78c3e7d85494aa8bda4706f97dfe9906382ae61b18394697c077. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:57Z), 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/QZS652151802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26014342f892341625ea6c0a6323f3fcb2338f915f5a9e060ac47879921e28a4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS642182828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25618c036f5f0bd8ecc4f5e24c8f5af3ff47ecdcc7398d9041649359edca557. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZS672198200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd52bcd2118d130df43f2702815cce35d354930841274e5ed6e0f6bdbfd5ff3. 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/QZN882287963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8697ae4a83d5e1136506dd98a3cdd4dfb55b5ba04473abe9165f4d68bfebc48a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZN882287964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0288baeb4667929c888f2d0974ea1e0b37d01e3afb6c9faf3b57b1b6c74ae856. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWBE2263892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82a8631bc98ed7bf550e53006158422d277bdf93eea934eb9d67369d5926fe8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZWBE2264252.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c1aa33d02c4282d872417e9ef9bd5292f573f76c4652cff819dd6005f6075c. 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/ATR981312027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d05219be66c1bb18983b28f0a7f781682126c1ad936284970d31d9097fa68b. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/ATR981313981.