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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1062d542d82386325bc6d10e736ab225c5c94821c28b81e562ca0476cee0e44a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13111368-5066-4597-a666-302fe9c53937.json and https://artists.proofprofile.net/proofs/artist/13111368-5066-4597-a666-302fe9c53937.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcc8b1c3ec37f172f7bd5800c2142483d52cb2cf17e99cbafd69f34aa720ed9. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USA2P2476373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91be1be1abeb2babdd277377bc00c378410517931bfc8f0dbafd422edb42f8f5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA2P2476384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470952dc567d5e3bd8b567c0159fe65c0dab649c1749f67d4ddbf79a55b53751. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USA2P2476388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ca1bc0739687620466b8c5e4e1e7d8311236931e47635cbabc02aa7feda5d5. 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/USA2P2476387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26383ce6ddea3770f060757f6f0c93c147af37d679c90b968a75761a85838f1. 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/USA2P2476390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57078679a33f5a2de19adbdca321b3ea1b7870aedd783e00c5ea66ce93b2bec7. 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/USA2P2476357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64677f82eadb003ec0408338b4185c2cc1aad2a2e58f32c96a043c255bcf507. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA2P2476332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0969121677dcb83a80576547bbf09d94e2f73c9f799c7971ba7afd61b972102f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USA2P2476340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8bce4fbe0f5d0b200df88b45456cabdcc0f334ae486ce1d2be007eef3d5f52. 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/USA2P2476338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfa262c8b277217145905de12f7560de90a5aec184a3e583db9ff4f901689f7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USA2P2476336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9d392688a90511c22bb1f461b6b9b85d797bcfc2758c2f96e8e865dc7326c8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USA2P2476300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e3b33b0cf8f753408e8c16362369e32f3ee5c21fe69825de0b6ecff097eef0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2476047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358c348000492c5d3be87c4ea3287b3d38d232f4b0a80c3088f29e775590e293. 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/USA2P2476050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e991deba79787817e3aca8798eec94824262796f743f7e1c743fc166e159405. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USA2P2476057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadb6d4ea14aab616c94483d8476ba4c34b70ccef3782383a8a79a9a7b26237a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2476058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233acd90b13b6ab847b765ea2cb9bacdc062c805a130c36ad8e22a7288480310. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2476061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e7806763dea9e004b2e2768adc6a2ff0830093cf09d7fc34afa430f4d46180. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2476062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca0321ed11aad54b48f042510546d5b175399cf7383e9a197e5598d1eddefd0. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USA2P2476325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e34669ad2162f0a189b1f80e0d2664d180e358cca277d7d46f5aa53782b3448. 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/USA2P2337733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13f25696344d43a9944ef9a091deb76b6f8aa8f3dd5f98f74dd51f31c2a8303. 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/USA2P2337726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dda5dd2483dda16ea18a3250ddfb5fc741ab847111beda89821bc28616dde8. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/USA2P2337724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98638b5391fea8d24a5c0c06522180a9ba904ae8549f6d780aa61284fa57b12. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2525086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5c2719cd362748981fd6387d47ceb006f1388a458e6e3f47e7bd6611e380dc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2525097.