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 0xc04aae7248d199ec44495c91360d0eb417c4c59920beee23075fb4c9093a0b38. 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/e4b6924b-5ab1-408e-ad5f-9606d5e720bb.json and https://artists.proofprofile.net/proofs/artist/e4b6924b-5ab1-408e-ad5f-9606d5e720bb.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 0x7e047c428ef8df40fa855d14467a5372b9ec69156accf77a4cf714c86a6c4bba. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBLV62113870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8886c910af6e21199345cba726a353c153a277756dea00dd21f0bc5bc4bd8e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBLV62124145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d25482cc11df7046a80469564b9a4890deffd162fa462b0ed4f88dced58eb4b. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/GBLV62124146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f20ced3369c9ba0e9a1dedb4d1edd58dc8e09790cc55ac03867ed56d68acdd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLV62124147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca9fc89e817652d05214fc526bed45811f6b4bacfcadee946439f643449bc08. 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/GBLV62124148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f201486d1a77691303ad8103043ee27dc77032ac180f68a24cc81383b18d89. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBKQU2297355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5747473db514052e0ac4ecaa9f40e3d4f1e181076f397d21fb06d07b98e0f593. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR10S2138883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d5b9b9c0275131404313bde331fca09f72464b6114b3261a727a26c8f67561. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKKS72000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3651871a5ffba30f10a8fc70f40a98d38649ea6f4801bb9144611778e01b789a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/UKKS72300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217a6b410021d893064c10fb087c644d03572e1cc4dda809bd01686d39f2c32d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBKQU2406310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebab36fb6558e85d7ce634f81ba6c8041c42a5db905c4708ff672b7dfcaf89d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKQU2406312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055118645552dc05d5406a5b976603876ce42fc68931413452ac8435f8199461. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2406313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27d902169af03c4ec76eb939260afb2ab4b156f6ae278a9796ca006cd2bffb2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2406314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9ec7c9acff2d6e3f76b8bcc60228a5d11a22437cdadac31d63e84934edc769. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2406315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd65428cf3c9de17684e611fd3714e1d60015c4758c363bbdaf398d59d7cd12. 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/GBKQU2406316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4110b54c7d790489939b2f121bf00c73d39ecaf0688e5567dea3dce9efd43d82. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBKQU2406317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563addcfcb6d35b3500ec6668d12293388fa5364fa5cdb1269b638631e67a06c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBKQU2406318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828fc18ac16a70bba8885343d2062c325af695a81a5e3543092ede274bf67ffa. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2406319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65634a89dbc06188a66175997923ce4777bf1097be9fe80a9d79e0284b89b1e2. 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/GBKQU2406320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87ae2e886c581d1c97b9a4cd65d0395168e0d7b049803e7469d79dd08f83dd2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBKQU2406321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f098981c215dd98e7992a98201b7a49c332cd63fe07e097dcf82051e1165f55. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2406322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6332ff9e3dab4880327c79c2d565c09e1c1b331a643ad1301b56bed36bf1231a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLD642100001.