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 0x2ab25de6c31083d63b838971d2f80b7a923674460692b9c0a94c13617b8e9d6c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a1e7716-ed07-4cd0-aa19-69c373998270.json and https://artists.proofprofile.net/proofs/artist/7a1e7716-ed07-4cd0-aa19-69c373998270.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 0x5a3634d71f8be0ab5defe44e7d875b3c290ca56ffcaf6420a29817cd41390b60. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:19Z), 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/DEZC62110019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dc0122d320e2121046eb0cfa6edce2b15410c9b313eb7416d550ef4ba21618. 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/DEZC62110020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c6d419ec74e7787373fcc69bc32f46f3ac1bd69f8b98a74473f1a62dd2720f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PL04U2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c710da6ae823bb01c09ad0859a318a8bf6d6642d027f3d4c3fff43e2991cf8. 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/US83Z2239877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6c376da89e3f419a5b1e6d4016a5f6f0b16ed752fc98acd5c8505b507a9727. 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/PLI365013050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668953266914ea6de08b5e6ef519e20689c8fa486a5f01039ef188ac365d5580. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:19:12Z), 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/PLI365013080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52d1fdfeff8c7cd81736a2d7d0eb58907a20a21a78a0270fe19dce802478778. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2348212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8839da21d92d210af7702f3c8d26b3ce1ead1e2d591392531207b703b2327ac7. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/DGA092425140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c710da6ae823bb01c09ad0859a318a8bf6d6642d027f3d4c3fff43e2991cf8. 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/US83Z2239877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b6bb7869fd9b7c04f0f2d6e5017b81296c6d206bb818e8e8862b86fe2312d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLL591400411.