thumb|right|Agamemnon, Talthybius and Epeius, relief from Samothrace, ca. 560 BC, Louvre In Greek mythology, the Cabeiri or Cabiri (), also transliterated Kabeiri or Kabiri,Kabiri is the transliterat
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 0xf1133e43096cfc245c043e57e38022935b913b05d4dabcc0be0420da00034f31. 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/6ca88628-e9c5-4c0a-a366-c55ca459d4d6.json and https://artists.proofprofile.net/proofs/artist/6ca88628-e9c5-4c0a-a366-c55ca459d4d6.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 0xeb00d142a7f8a3efa4d81f972d9e0d9887a2761def21a1618b072e69b8a5896e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USCGH1189944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba274ec5d942edbf40147705b83f2526c243d58efe1d811fbf207c91713e7a2d. 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/RUA491437762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03855d786135fcde6bb46ec04581ad2ab7e12d10ec7194b5d80729cd9465c499. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/RUA491437763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6aeaacb6d953a0cc38db507dd6ea620882c67323dad6fd785234525a19d742a. 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/USQY51505019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a561d817ad06d8c4a487a9085a0fe39adb7c248a3eee94a1571163a761bf7ee. 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/GBKQU1513067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2943a4ba22e9d7f6d393889eff821eb134db5fb88fb11fd25cba5f7fc4eb25cd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAGWA1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984bc3edf9d002f3ad488bf194a355889227045d5569e27ffc3d1310f5690939. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/US83Z2016143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72764dcc0fed18394cc7d7a32eebd0e38ec317e630b064b3fa25820b81b8a15. 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/DEAR41178095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155e5551ca0683d450d9973ed71ccf53bde26342064744e871b5045d8e1fe5ba. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBKQU1953858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfac91badfe0b33394ea5f10933493ca715d67e138214c27178e3b56b02610af. 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/USHM91293438.