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 0xd6bed416ac0828ba8f70dccc2315cb26c5d439865248eaa2abf9f5f5b4f20cd6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35edc04a-e1b1-4b73-9202-d6e7cb9d14c7.json and https://artists.proofprofile.net/proofs/artist/35edc04a-e1b1-4b73-9202-d6e7cb9d14c7.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 0x63a1340580d42b461362af163d1612e68c1428b971e6156c0fea73e342ab5bf7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CH7811102306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d7e55e87559d5e370bf99bd059611cb888746ae54d01e6918cedf1dbf6a314. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CH7811102478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bc2dece010dd0edfbb358483e6c1aefa05834ee660b4a30b3c5781c60fe6bb. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CH7811102681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d7e55e87559d5e370bf99bd059611cb888746ae54d01e6918cedf1dbf6a314. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH7811102478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb5ec2f0c9fbdb0e8937320e38119528bc418280086a7b3ff93d31b1f14cbaa. 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/CH7811102686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621113e8eba2c1dd9e33517e7e8206efa71785f64ba29ddda813377e2d4d6f93. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH7811102690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4b8c4676acf199dd192cd0c9e2ab07c2346b494841478d2c45af3c66b7ba77. 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/QZNMV2067701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d5d3dcdd4a036749202b7490de1c36b54eb0ecc7dc2752eb49726ce8bd28a9. 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/USA2P2031555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51519d7aac3b2cf87e27f4000b19416c6b5a62e5ae4cbafad1611d003fe86ade. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNMV2436977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24c297a9224b5c6749c1b6d0aacefa45c97fc586147d87c2cee28832c71a7ab. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZNMW2496867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b4258de2d7baeb33f232f407a470950879e054fdecec64880dc0ba3957c6cc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNMW2496871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c1cebcb9c7ae434da11f2e98f828f8dd3db45f2425c73fc27f8a6686f6bd9d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNMW2496877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa9d0d9989ad4d61be4d0944219dff46dfb896323a9e8ba8db29e2ff85a5afc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEV2580660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad503fe7bafb46f618d53525f3aad1291a5c16ab2b8cc599733995be3e7aaf1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNMV2547009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4c871711086524e7079f03321512a43056eb9631887101c1278bdc86e46e0c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNMX2502892.