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 0x7dc1f77770f4a4fb18fa9cf29db2a8197cf2d5a6394d62af50c57fef600f1f9b. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cbb1f1c-f947-4521-b325-ca1540a0cd2f.json and https://artists.proofprofile.net/proofs/artist/8cbb1f1c-f947-4521-b325-ca1540a0cd2f.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 0xce4e9676b912c8ad40469953e1bf9a6346019441dcb65829ce58e11ba58bc4b0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGLM2135004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab43ce3b70f92fae53514b7a3ac462b3792ddb067767a88d9af0a1d3f8fa034. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:43:15Z), 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/BCPC32100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d85d8c828266f08691438d854f78f5e7558dcbc8027dd0be09dff643f145d3f. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNJY2197908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccafb45bc22b1b6875af7071679fd66b15e3397461ce9bde3aae18fa452777d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHZ52236621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2073788188e11f13000df9340652b41a276b6ffd862b516a8fc6b895030cd514. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:21Z), 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/QZW9K2281481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c0bfc4dc694c061ef112f333905467471ae935e2099331990fca4ca68e3ce2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZW9K2281483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59bb57dfd5bebdf60e810b10b6e6dd3bb2add6589836416522992a165a06b23. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/US7VG2478625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120997e4550311e5e5aa4fedbb26c49f00dbc0ba5f106295919f74cefce599b4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZW9K2490783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42a44201bdd8aaa7bef5e44321b394e1994c6696dbcf6570d151e7beba9de5b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNJV2553705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e87974cca3e3ef0f66329040649286b21fc0d4d23406855eaee99c036aa244. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJW2520158.