thumb|upright=1.5|Weaving a small tapestry on a high-warp loom, 2022, New Zealand right|thumb|One of the tapestries in the series The Hunt of the Unicorn: The Unicorn is Found, circa 1495–1505, The Cl
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 0x49b22fb22882e99ead8a0280f4ec01b4f36d56900cfe6438196acb21525b4b3b. 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/40695227-1521-45c9-b73e-9b53c80f3b42.json and https://artists.proofprofile.net/proofs/artist/40695227-1521-45c9-b73e-9b53c80f3b42.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 0xbafe9628ac1a5a5b3287f52f24ebd5b8567db62a737c796817a5e898644b63b9. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/AUBEC1716382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7ac7ad0cd91020f02d52c1adcb5c1c362ac517caeb3748eb672c1a8cf90390. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/AUBEC1716383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19d689b8e2e33c0d08dbf32623db2297ede37e28756e98eeb1596340c31e7f6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/AUBEC1716384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00486731816eaf0922408300de99b3d49117e509f01f7d71fa206c830b4c5957. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUBEC1711427.
The Pain You Desire, The Love You Deserve
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae3bbd3816a5306f27515c9de7e4e5fb5e575b84cc9139c3e3f04fc71420d6b. 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/AUMEV2386490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea6bc931d1895cd0ffcdc8287fcba59931aa86aee8f73e83874aaf1793adf40. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/AUMEV2386493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe129fdda901fb8ea1032e94863a634e80a4ad7ed339ff6768e79b6a14c5066f8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUMEV2386494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50060ce094aa5db867dff84ed755b266c9acf04e4ba4c4935a383d6c4a640c42. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/AUMEV2386496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99193af03fca43aa90be164a4f5505aaf6375f07eb912d3532b872db5be6fe72. 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/AUMEV2386501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cb2d9a8c60133672ce7630d7b223ec8579d58912c4c4d7632ae0fd25026cae. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/AUMEV2386504.