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 0x5deda448576b60609cd7e383c8770bb0c39f23886fc365440c63b6e96a478966. 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/6c4180f9-450e-411d-a927-cf7e009a1b3e.json and https://artists.proofprofile.net/proofs/artist/6c4180f9-450e-411d-a927-cf7e009a1b3e.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 0xd78bf12574dbe6dbd4bb124564f87e00887b42f5584c2c790ced803a1600289c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ122341020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c19d1575cfec1f7b69fc103c56e461fc860e784df73c1ae16715a5f75f0229. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ122341010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a91673c39e6786d3ba8e3bff7d190c44d92e72d1f7068ae004bdaafdc8fd55b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122341041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4ae67bc3939b1bebcf3b6065732e4c657dfa09f43798ad0fac592c050671b3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ122446013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb74c17d3dcdc63f5cd7e61e6628cda92dd43107a631d8df3c066e0cc33e7ec2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ122441011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c836eb16076ca4caffe7e1ef361f443392e0a1ef99a45fb6c8fe59c2d85485. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEQ122441012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a91d2576f06f083570ed091bfccf08aa3b603519ef7f2680b9bc38ef4252153. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ122446019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea5d9f54dc75cc1fae5a5c24c42d439bd82e41c6ae8e5e31a922d943ccf5e85. 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/DEQ122341027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839c857eaafab0e44dc5dfd4b69998ea76c033d50b64a30fbd41fe63cda52480. 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/DEQ122341024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce0efbaa1961dff76fd29f52f3d80374d86fd57f45cc1c416b3f6232e66cbaf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122341018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0447966103a1e0c5cf98ccf66571183ce48a70f5b7b0dceaae348d6907baf0e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEQ122341013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75292cf627eec0ff15310cde363cd87015d6eccb55bd4e2820a2473d94f93dc0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ122446038.