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 0xfacad42e4ffab4d0c2a599ea99e073db39f519defe682466275336af40e01421. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c787342e-36f0-4614-8248-dcde9bcbc2ab.json and https://artists.proofprofile.net/proofs/artist/c787342e-36f0-4614-8248-dcde9bcbc2ab.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 0xd9521375c2b843dd8340a76fdb9ee3eb5df18fbb976b1602dd5739571f99fa20. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/BR79U2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a41f55ea8cee64a7008d714bacb252a3bfe04060838e66ab904b251760a357. 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/BR79U2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd997d010b616d86e845f234c14955e78d3aa4e40410ed69ad3deb25971e864. 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/BR79U2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac598ea8c8fc86aef73681ea0a42b1c8d318fcf82d161c4bb4fd76d605e74b73. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BR79U2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bbb2ad6eada207fe4d25466cf2472979cb8cb99c9eb56e007f13896b5f7798. 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/BR79U2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5368e6bb4f49a34e426c9c8fb6bed63d4df83fabc8a23437a9f0f5a750614226. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/BR79U2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af1c84a9df8f73b3d200c7025032896b09c40839dbd57d4613f4f7d8c8da7eb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:43:12Z), 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/BR79U2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d83c51eeeaa45dcf78651be241d37b9642994a7de8df26bb191293422f7a8d. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/BR79U2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da8f990bb8ef6c6d11f2845038fa2b80141200ee6b7e9fe649623127a72543f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:39:28Z), 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/BR79U2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259eae40abc0c2646582db70c91b81cb7c79d4937a33149bb3123f5be38182ca. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/BR79U2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd116ed9940012210fd6b963a9e143e83b4bb8041670150ba3410539b44a077. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:12Z), 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/BR79U2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8604b84a3cf450605b16570ee9c0c86a8ab7f0ac416beeeef4a48069da1feedf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:25Z), 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/BR79U2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36f8a885cda589543cfc0f4fb3831fab85e591314bcc9e85528b777012a96e4. 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/BR79U2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf325ff037a626c5cf75c7f1d93e860d92c08b8adca8c182fc332352953a84320. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/BR79U2400011.