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 0xefbdc78dc7dd09da2eadd8ab5677cf52891f8c2056bd3f6d3abbe2795dbe7825. 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/9e4b5ede-b830-4172-93aa-6716b96d1e87.json and https://artists.proofprofile.net/proofs/artist/9e4b5ede-b830-4172-93aa-6716b96d1e87.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 0x03dfbaaf9869b57d70b612ba7866369f2481cd081461f92a0fc0e263af808f40. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/USYFZ1558401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe00fe9f15fa8a138367e5e6e714dd254e7905188067f3283efe4ab84f87d845. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USYFZ1809007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aadf13e72955a4562bdd2ee59adc92f5093d38549d7fcbc9df245a9d757cc7. 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/USYFZ2265401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62acb0cbff4b90dac3c356f4504c875f33ed7d01d52060c83f731db09f584e1f. 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/USYFZ2265402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d8828d8bf3b0f35687370c257c1e4e3b2f93623782b5274dd2b297a15c3643. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USYFZ2265403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c9c4b6e8b4050f797a60568fb3c809bf81de52ae7667f03682e852a6212ed5. 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/USYFZ2265404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c7f89d7f17c89ab4fdfc650a27f95a92fd8f8b005af823b03f76cfd597cf54. 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/USYFZ2265405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6f6a24ad1c1946ff101387efd5579dff507729cc83b46919749ebe4225c0eb. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USYFZ2265406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105280f0533e4c448d745c5ad37ad8147cab2a2b21128addfb89975de9a33a75. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USYFZ2265407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e17924f079d15eaecdb441f56bc6ad6721aec202809b43444fa275c7e01b58. 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/US7VG2426760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a204a94bb66d01a4125ec1ffcfc5e5dc067538b5d8062f8ee54d1e0222e6c1. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZNJX2414184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1670d85633ba41ccbdae93d258faba09401b5f8c6519f7571dc060caf02aec11. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZMZ92462420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3f35b389299c641661cfdca78c4c3d284746c1663a1084af89aaf12a48efe0. 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/QZ5AB2482077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334c21bd6a26b3737524b9509b612327edea4d0f16346c48d38ad814ea290393. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNJX2414186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aeba0aa6399139343793dcfc9f3677b98d8bfee7715b334d2d382313eea11c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:56:16Z), 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/QZNJX2414187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd592b648fea650bd14d84613c82ffa8b88cfcd8895434662cb7b0445f707d35d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZW9K2479404.