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 0x7734b34cb345400bde702d63b2750c237047cf19b5138740a6a78d5d35a1ceb4. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3be49241-4676-45ea-a07d-e737badb4188.json and https://artists.proofprofile.net/proofs/artist/3be49241-4676-45ea-a07d-e737badb4188.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 0xc79a406c31b5b1ccd62b3c7f43375c8cba44d22c29f5351c0a9df1aa5f69a890. 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/QZWFM2448997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd224c8af3010abeed5f812ec1f7f0e1b292fcc11f4ce1be1853316c1527733f9. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFM2415305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca010328d18d8aa2028118c947de5e5bf4b71773fef425d32b6660b6401c5104. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QT3EX2410230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aec6c3a3cd70fcfbe2341512c56ec0554e84fe85f2eb7ec0015577f468fc80. 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/QZFYY2524572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cd5fd89606c4ba78fc379da4828bdf02188373c1a80cc1e0e2611971b3a3e6. 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/QZFZ72536889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1c74a8beae2b53c286b2b75d255f99df906dc4bcaa7a0c8784742901959a52. 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/QZDA72594785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc4fe2b623674caa8806256b05d0cc2542631a3a87b6d5f00010c65a4dd90c9. 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/QZDA72594786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5685168bae30fafcec2e7da71217006d4d3fac3142e3132561a1cb417213954. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZDA72594787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde6ae813f06d0b47167df8d258f27acd54612fb74b2c4c0e5cd1d7583db15c1. 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/QZDA72594788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9589b3e1b7aec1d17d7f1cf3b8681c41cb3d93d4923f07697caa5b4e452fac. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZDA72594789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8e7142888c413f6bc8319f21bd081a08375ff1c39980c5f5e45ab487a9e689. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZHN32523198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801343a18de37379e504cb989f2a6a55095959beef5ba3868755725c00943be7. 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/QZHN32583510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fdb1218a86d78e97ea09c4ea7b2c2709ca2d4b3e3bcaa3a0ebe9195f08e6aa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:12Z), 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/QZHN82574749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76acec87027c1b3492b2ae6574c973a7d1c72c8b9f95ba2a6a385467f18d1c7f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN82577915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8577a68d97d93f1b376ba640e7f6599bb9c0281df2ac14e8741f6f292e5e4ad6. 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/QZK6G2541491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d70ff5a0aa13fa1f6e16cd574172ee0095156e9d48a43ec4677fc42842958ea. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:14Z), 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/QZNWX2569589.