thumb|Archetypical appearance of a crone.Old Woman Seen from Behind,by Vincent van Gogh. In folklore, a crone is an old woman who may be characterized as disagreeable, malicious, or sinister in manner
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 0xa2f18c9ac6e365946795ba89fa630a9848c5b5b7a864f0336bd48732b2c434cc. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4d487bd-cede-4741-a4c2-a7e79dd385e5.json and https://artists.proofprofile.net/proofs/artist/a4d487bd-cede-4741-a4c2-a7e79dd385e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Synthetic Chor (Behind the Doll) [feat. Yawanava]
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 0x6d0fcf63094cffe027e31ab5e5cc62a3b701db981b4bd24c99c81d1be9504291. 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/QZDA42187403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e1694c2aaf423b4305bef1e75ca507aa5b824b8c2f4549140bca0a6d58b098. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZFZ42265349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc579ab0bbf31d597cb34ec7538e0373dd8300fc535647403b7d0f98977d97e50. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:28:53Z), 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/QZFZ42265350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043f7208ac7708d21d0c2c6058c48bef10b981f10a2843f278883db760314be9. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZK6H2204836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa288577ceff42c1903fd676da893d57feacc635f6e506dc0c3576b6cea0527eb. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTB92345210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9247de3a86e3518a87c78ed35f7c03a7244db8858a34171b02cfc75221bcbd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZMEP2448183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe108c1440a2947d42ebc4094525cbdc76cbf4fbc31bf7c39cff730efdc6b56f3. 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/QZMEP2448184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9878369e1d0d1b02aaaa84b8438c60e1958acf3fea9356675b1215350d0883c. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZMEP2448185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b1133dbf2235c973024613a2cedc55fa07cd1352658e7bfa6576685c87e826. 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/QZMEP2448186.