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 0x44de037df24d6c2ed6594964cd91e6911569bf354abfb6072a08d17642e9a24a. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d810a97b-84a7-446e-bd96-d04ad0ef112e.json and https://artists.proofprofile.net/proofs/artist/d810a97b-84a7-446e-bd96-d04ad0ef112e.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 0xbab31005995e3766b433d8fe61cdc0036a07a7c57d6b6ca10986e3d0b06145e0. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBLFP2393638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794e35c0c4704c7ae886e82ce45c71ae55d5a4991b380af74bc71f2358dc4a76. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:04:49Z), 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/GBLFP2393645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee8473b9b73af63184b61a0c901052291161bc893fd39631dc38fc4a6af7d6b. 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/GBLFP2393639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b654f4045384f32d933d66904d1b7f2da8ee5a891e4020a4ec09fcb301a95d. 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/GBLFP2393641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6bbc6201ddee80baf0e99b25abb9589eba39153cf15fe83970be719953ee68. 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/GBLFP2393642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf3f53ca5426a42501c6bf919db31947772afe48b9173ee17174510be903f51. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBLFP2393643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9084cea8b35ade22075319bef84f272e1bc4a4f38e4792926d29ab2a4cb9f0. 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/GBLFP2393644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1ca1fe55961ff0796dcdce4df944969aa948852a0984bb179566066b3b43fe. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBLFP2393646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba171c3e57569b82c5bd772160e5a2eb1e4a0df3e8cfba5f7ad069a3e8d6239. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/GBLFP2393647.