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 0xcbe60b9c8fdf7d052f8288f1ab25ee598bc9106a07694b44bc5a9b35fc5a867f. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/843da81c-ca41-4e4f-bf99-86a3501bff28.json and https://artists.proofprofile.net/proofs/artist/843da81c-ca41-4e4f-bf99-86a3501bff28.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 0x6fb2eaa0395cdcc2eba85ac4abfc0374a87a258b0ab70dc5cabd71bc95d300aa. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZVEM2557277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b1975cce1628a872655c6d343f946e64fe4e011b764129d76c9da2a977f6fb. 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/QZVEM2557278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d446f6f15adda9fa33135351befc16eadd9cb526305dc9c2ce02e1cbb562e52. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZVEM2557279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddede7691e2d48b959df88b7932a030336364d275d56a1a49ac7b0d31c29db4d. 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/QZVEM2557281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe524ba0a817ee199c76c7c76b899f0eb4afddf94afbc5064f2adfa28ebe4c82a. 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/QZVEM2557282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2db397e616bd2c020e04138d9448519a6b5d8bec9cc3f72ea52b4e03dca292. 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/QZVEM2557283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5c636f8acb7c33067afd3c9bd14b6c45c2570ce551eb090b88ed5a0133b6fe. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:28:08Z), 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/QZVEM2557284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb827fb4aef78deb038360af9d68bb6a72074dc4d5627a8bd9aa753aba6208540. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZVEM2557285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d48ad0111f2b325c78469239c6e2166060f8f29b121e6a08b2792c1c224aedf. 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/QZVEM2557286.