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 0xe35bb7005a4e510ca90dc30b0c9a9ca6c6b5eab45b1786ea192ae44a8a62be0c. 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/8c0d8cbe-0694-4b37-a6de-3fc68eb1c017.json and https://artists.proofprofile.net/proofs/artist/8c0d8cbe-0694-4b37-a6de-3fc68eb1c017.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 0x7b096dbde52e65b88d8eb2f0cd2737429b45c4fba3085728e6dee2b6980fc41d. 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/DEZN82457108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64ceadb3831a25f35f6530d23f55ffde842a6af3b7c34970b78f7966fca97be. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEZN82457099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4618e6c835f1c91d7c6d9d9d2fcb30914269cc4404d3fe4407ece0fcc8518f97. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DEZN82457102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0f0757f508554af8281bace75d40ed0b9e63d4b1c38f88f69488453d43e73a. 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/DEZN82457103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce920fe0fe8bb78d555f6a93d35266a5bf94c520d5e4a504b2875719ecd1b57d. 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/DEZN82457133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a44e4d06257821f040d94325b39c245056ab769bed85be18fb4bc090026bcc. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/DEZN82457134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead6b98a5c4dcb67d3cd994d9edf5b844a37d62b64e20a1f1ff0675ccde0d2a0. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEZN82457107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363697a2d17988d0eda48240ce0e15136065fab0686355156275b53cff2a428c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEZN82457106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b096dbde52e65b88d8eb2f0cd2737429b45c4fba3085728e6dee2b6980fc41d. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/DEZN82457108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda5a8553c96e78e13695477b9ae7a2cd5da9d11d47dbc610a3c9957a692185b. 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/DEZN82457105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a4c0bc286342bbbfb8d4d29b4a1e23506ea28bbbb891e1ce7a9f9512136891. 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/DEZN82458159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa084e716edd96f3ceb0c0eb10e36080c25cbe8fa8d6b9f2c17a2bb11bd887365. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEZN82458161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eee121a6b22ef95ed2ef8e953d8584708c470869ccaab383202d8dd3f292254. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DEZN82458162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69c353082ded2468b98dd382d640e2d220c385816860d17d378931966e1fdb9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEZN82458165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbbd0a9d7d09a05ec00a60e8e7c35344e34e2a69ff80558931f58859d07160c. 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/DEZN82458164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7413526c61d31521e8268d81b293471fe89835dfbec7f87fd8a8a4ab964a2cb. 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/DEZN82458166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2f99a7bb8800af1f226b980c419310a980f5eba39eb8d776dabe955df7ca0d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEZN82458160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033ccfe2bfa838925662ef3c3bca9e0bb11df4295a4ba68d543d9afdc6c59169. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEZN82459798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380cf0ffe28711350037419dc7dad3f0e1251f54895a7a6d1ad175d96b2eaeda. 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/DEZN82459794.