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 0xe8b156bbdd0f0d40a17c4271357126583fce346f2af6fd10218dafd1071dd483. 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/aa4bf97b-c45a-47df-89cd-1895a1eca20b.json and https://artists.proofprofile.net/proofs/artist/aa4bf97b-c45a-47df-89cd-1895a1eca20b.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 0x1a77f47652b2f795b5eeb30fcc4a1d28901220c5ccfca8fe789ec227de9b3050. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFZ32229044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac7eb1e923f277423e44190c9c4c8c1626075a8799d45dcfa12b004786805fc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72391443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe4053541701281ef27e31b2cbd5fb052ab33feb01a2be03bf69c8a76fa8ec5. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZHNB2347433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5cd03ea6993708e0e4a36e6a6a3c62916f44fce236b27a1ff2a7ef5e550cbf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWV2388209.
FOR THE L.A.S.T (LOST | ALONE | SAD | TIRED)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb9f986aae7beabc3f8cb2184303c465146fca0f0517bb53532b395077ffccc. 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/QZTAW2378545.
FOR THE L.A.S.T (LOST,ALONE,SORED,TIRED)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06773f7d0a1041ca5a39e23b980218ccea4e06d67dc5db37cbec5e5cdd40da46. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/QZFYY2544916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281f4acee333df0dab3f0b9bda3d32ee84824dc07ea0e57e70de38fe0547c798. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6P2517770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cd2fd97e847c5542b7b0d56351d3e9ee51d33e2ebde0b314922e51f4b01000. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZMEQ2560588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e3ad59c5249a6ed260f4bf352d1da33e48a47f569df28be10d724914647e57. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWV2301162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593b4b5877ceba7e9e860f191dd9d9c2e1dc00e0a54e396a207e4afc97a92a6e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWDW2578488.