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 0xeedfbe039e6e2feba1ca66e345a65b2af13f6c64e0f9eb86424e630e4b86d202. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b985929d-b0e5-4277-aaaa-4f201f381c78.json and https://artists.proofprofile.net/proofs/artist/b985929d-b0e5-4277-aaaa-4f201f381c78.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 0xb3ddb53dc452f52f1055a20c471e733f5bc4bd6a03198a92b8b5bf41fc3f4f2a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:31:22Z), 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/QZES81918274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201417431f4495a1678567c245292b7a7480051fece6675b45c5a88789d805b5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES81918276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4635d84dbe2487d0742f2c9b7d22a11f223a68d290db97affac82e90fc58c45b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USWQW2200255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73197c37e41711cbc3f96826d2bb394587b97003bcac728b37da64778d5d6d95. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:29:56Z), 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/USWQW2200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7cc3e5a8c7a0a07a4ed62c89ae37d53a59ec109267c06f4aa37c3a97937032. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USWQW2200370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd07454fa98693c2df4ef1d9e9c5ee238f8a36265f9ad4e2b2bab66e2e2b6492. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:37Z), 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/USWQW2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f31ff994044947b48a714bd5aa4971952c531713ff5998b5250ee95303a951. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USWQW2300024.