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 0x03e1d96dbd20cb193849e0ac750122b3d0d1811ae01f029f3130175c21326c17. 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/846d0e99-bf54-4422-b5ab-ab705c75b780.json and https://artists.proofprofile.net/proofs/artist/846d0e99-bf54-4422-b5ab-ab705c75b780.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 0x0343df29c62502cb8cbc352e5e60d9d02df358ad00db3903da1e6ebc2bb9e4ec. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE5W32101017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f85da7ffb341bcc62d8688203578e11b622e5fe41e82db7497a1d8e4a226a06. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:17:42Z), 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/SE5W32102054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3a4d23e3c5cb959e4270ca11356fecdc03d49d2873f789c62a0238fbd6aac6. 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/SE5W32103276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebf77859a30d302b5b9f16c6838b5dfe3bbbe9990d306b2db56e8072f048419. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:38:31Z), 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/SE5W32201867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2afd6a6b84b0dae19f2e87d59b8622f5ced20eca700d09d3e555fe34d87871. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5W32201868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a059cbe668644fb959becf1974ea64cbb523a7f19787d75ce436a4f3452d222. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/SE5W32202682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f04a5a6447e895595e8d373fb1f1dd2448d090e813504d02d95ef4ef0b04ea. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SE5W32300342.