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 0x5b2b85e2d41a4da2a4c9fd41a2e32c9ea15f06080f717dee96827f1a6859d030. 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/1a953b11-9bc4-4b57-aabb-f715a39fb51f.json and https://artists.proofprofile.net/proofs/artist/1a953b11-9bc4-4b57-aabb-f715a39fb51f.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 0x3c01e93280e0977f6c3c79df1a7249fb82e14b93eded71a11c8d8962fb8c36c1. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/FR4GL1097503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc964124176ce5ea207228e934c540dbcfb5cc9a780b4c2dc9a6301c3c0a9e7d5. 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/FR4GL1097504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cfa839dc5e3ab3c4d940789ea29fe1fe7ab1516188a3be58e080dca180c95b. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/QMDA61806302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941038a256a9ab6ef6dde6a10c42869abe0bc3cdf97d684877756c3f287bed38. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QMDA61806136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb092825d2b27aa93d14aaaf73f211828be7f9e01a1e05d42f3f6b01e2d3d601b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMDA61806137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28eefbeeb3a700d6e8608be77abe62e8d43274f7362063f1cb418a3f24cd816. 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/QMDA61806138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1879e960d4f157c1eb7e03589d734bcf2e6ef92e236f110e7a84b1d3624d26ba. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QMDA61806139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3160e90b14008d4510bb5523f9ea6450ceff922c635425b00e801550fc1e2e44. 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/QMDA61806140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9a5c3b5116194087c2ba8ddd1648eaf2b2f4b59320a20b678cabf45d1819d2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMDA61806141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b2399335c602c0dfd42986f4e8719df3b3c20e2619cd8c12379911fc700417. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:24:13Z), 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/QMDA61806142.