thumb|right|Yogini, 10th century Chola dynasty, Tamil Nadu, India. From the Smithsonian Institution. A yogini (Sanskrit: योगिनी, IAST: ) is a female master practitioner of tantra and yoga, as well as
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 0xa7c91fa5129f8fc2abe774f977f5039b9a8e6e9d6e27091945bcb85e3e8e4860. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec11a60e-e0da-4db2-aeba-8c96b9d82085.json and https://artists.proofprofile.net/proofs/artist/ec11a60e-e0da-4db2-aeba-8c96b9d82085.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0387ed167e5e3bbcb1fd80ea77fcefed6ffa86b56e3dd77f81d42b8ccdd56931. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5BU2370948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e36416fa47ee9af2d28beeae279b745abb0ebb8827cf020b060f7dcebc7f12. 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/SE5BU2370905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22841a5167b91388fa7670c54b48c8861af2709ef43450e183f008b450a293f0. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SE5BU2371404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b165703eb2dda49024add4a77c2638db98ce5e99241068e4c5030eab1e7b8e. 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/SE6I32338802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0267fff425a0d52e9174501b0be7e7521ff18086c20b877191705ea1d5bcb. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:09Z), 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/SE6I32338771.