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 0xe39d376bc1fc6964b2724867aa033dee622ce21237b356f769ec51fcc3dcb359. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7cb21f8-b949-4fa3-8a28-12ee346c8609.json and https://artists.proofprofile.net/proofs/artist/d7cb21f8-b949-4fa3-8a28-12ee346c8609.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 0x519750cd13e1f07f06705761b320a6f393582d59220d8fa0f0b821df89eea632. 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/QZK6H2460118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76624066133b141738c34bf3d4ba306ec6a010454a8d59d84438a2ad3434fc23. 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/QZK6H2460120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2635b2549f8c86d3fb7d561e1bf0f676b467ac325668c36162fcaa37a44ba2c8. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZK6H2460121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3671626fb7412e8220d7e8572b1568491a0bf708f0cd3c15923b26aa7ea7cbd. 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/QZK6H2460122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d316499aed8c93c4c0d198e9dcb3ae228c73a4e1d52e6d016d54563253291ba. 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/QZK6H2460123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dfee57a6f9b299abc6664a6c73101a1a06d79e4cbd0a31672898859b10def9. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:39:04Z), 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/QZK6H2460124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3955cfc7e7669d92a49d6c9fb02ef61e8a0250227da9529d1b010c22b9d8461c. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZK6H2460125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac6036a3102ac4b529220481df9e7951395af5c07377e9edaf1e247d1dcc528. 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/QZK6H2460126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bf80c43bb2bb55f1632cb1b6f419da853d52225bf47b09b5d4a2041f0cfac6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZK6H2460127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a491b3eab74108809914339e53623e41d4579cb924a3f898edfcb0f66abffdb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6H2460128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab7db1c85b960db034105aad4976878919b07c83d1645719f9bf788fedf19a5. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:18:57Z), 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/QZES72582695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782862b5bdab82d8105fb8532a471113ade6c3eefdd8acd99f0d649b4a64ceab. 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/QZES72582696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c38d510b9ee74510650deea74af1315e760bc772bf482bc82c251bd877d5957. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES72582698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896da23caeb951d853cc4507cd90bcc5474f7827be6fd8d91d89118918f33489. 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/QZES72582699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a87a6d8e42b221b331d707f7207a2c64ccccb5f73b65e340923225fb1a8d1b6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:38:36Z), 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/QZES72582700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c596f261ce07325311660f3bde85b8c315c414d58d30cf2e1982d72752b3eb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZES72582701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae6d3f30bbd472a3c933a623b4c035bb72a107c9c967ee17a1c2610d4716391. 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/QZES72582703.