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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bef567913c1beb4d707852a227e2bbfd819690f18142e00f597289be8b48207. 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/5557ef10-82fc-41d2-a94e-31540bcc9b99.json and https://artists.proofprofile.net/proofs/artist/5557ef10-82fc-41d2-a94e-31540bcc9b99.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d15e44c44a5228bc7fb3195b546ebdef9f138ca6d4a720943942a2b71b6e49. 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/NOK6W1401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c16ef763108767430e482b53ab25cdeec3d0e6e4d1aa987ad9191882f1162ff. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NOK6W1401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8c828447855d6663f4a093321adfa3b148d036b3dd88f7ba364570fbab3476. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOK6W1401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21949ce5900102bedc49817a6b9e301996f2ab15de084f48d8b8752e7c47a48e. 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/NOK6W1401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa191e5a1b3233685a86ec450f257258d53f5fc5b8bf59e0f635de08b9edaf49e. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/NOK6W1401120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f3f1db104bec1e0c8ac1e310365dba4891d4b80423e1054413d9de7421187e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/NOK6W1801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06aedefade38bcd3eed93a00a67ca50baef39fdc178ea656dad0b37f68b33c2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NOK6W1802080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb768fbadefaaf3e1104b4d72c1c3d8667c80d494a059e1e975d156da8be0ca4c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/NOK6W2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a5653f0eb78f88a0df7c470c1a7f897625c2fd0d95d97e70fc69028e1f37b8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NOK6W2303010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217df97e56da59d3eeb6d5c85bf355753e03c7716661eaf0f554b01d6f897e5c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/NOK6W2302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ca85a04f689c284b4c2aa792a6d7e0027ea05da6c957100e85ef932dacc11c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NOK6W2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a83690facbdf0361062ae8f426b73d608173d7dda491ea298345ead44abeb0f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/NOK6W2501020.
It All Comes Down (To The Choices We Make)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42bb4258722b23f7d58d5aae6a494b77547f2ec71ae9b20b3e4bcca2a0f6f7c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NOK6W2501090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b1378dabf4be25c8f59efe89c3f8a29d8275f8d83a80b275b5bea346a2f618. 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/NOMRA0201050.