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 0xe3da6acb2655ff3d97f2849da77d1f2489cfbb1a55a83a88f4f51c4599d97cdc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c38d4bb8-c0b1-4ec1-98ee-8b90bf3e2bed.json and https://artists.proofprofile.net/proofs/artist/c38d4bb8-c0b1-4ec1-98ee-8b90bf3e2bed.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 0xbb67937be6035f725f48eb73b38d262f310aa4c4906cab4d6b6b3a207b9271f8. 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/PLE781300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88fb45255d73c6054f573b29c36d808f61f314fddcb6823f759b8aa62d59638. 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/PLE781300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859edca76705d3efe9429f851335d47a2af89e81dcc8acd7887304888a1775c0. 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/PLE781300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fb60b0590898d9c3c8a3b44f74bce0cc761da6b3b1e701b03842554a6fabab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLE781700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2bc3dfc73d093025c05efc523c05fc77f9d4983e9f1d9f31c52e844274040d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:34:07Z), 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/PLE781700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec26e993a020e2e69deaf1488998b20e8193cc6de57c269b608f5f4b5f168617. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:30Z), 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/PLE781700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26d29d78b7a13ae410f32ac759874d25dfe0036c169be3168dd46d0a2c69135. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLE781700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22857a2dfcca3e6ed2011772c70c54c50db8ba19c827956405e1824ba6cf7327. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/PLE781800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301a08a197fecabfbba9d896d69dbf71744a3c026102c80105a92515506f38dc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:11:05Z), 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/QZNWQ2126400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7492e6305365ded0e16c80209d3b07a40c7029de580757d6c3b76347522f88. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWQ2126401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf342e504fbf655ac607255cda5fb1f67f26b746ff4be2db1be1b3ac1c7c28c49. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWQ2126402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1916d8e4b7500d9dcffb2d0c0bef342c68559b45dc65f60f528307f6c86a396a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZNWQ2126403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9100590c751268b07e61c03923004899726418a7fac415e74e388f50ac1ccb99. 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/GX8KD2347450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411280d78fb8b749a7de1aa5fc7916eb55a189b0f36a1255df8b3257a1070ba3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GX8LD2366655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d8e29959eef019ede84592a9c4da1ba67aa5bc4ec05cb467e16d820b2de64f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:11Z), 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/GX89G2523463.