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 0xe4323106b55601349f5eeb1c755bb7aee6ed93d8cf5cc926300d59f9f0a635e1. 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/2f24d36c-877b-4520-9521-d390c12b9a42.json and https://artists.proofprofile.net/proofs/artist/2f24d36c-877b-4520-9521-d390c12b9a42.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 0x55f8e8a07117e2d5f8f5cca62b892b14bf819c0f282c88abb95281b18828ea35. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEY2013753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffcbf363610958450c53614b86ca57027f70b5d5bde979d718503b422958956. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAEY2013763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e1fe92bae9f5e122d460c469c069aca9eb85dce319365436bf7518403dcc87. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/TCAEY2013792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8efab6ace3ab1c95450a330659d8c9f8e3088435af5496d4ae21d90380a425. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAES2076863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c12c7d3944f738bf5405685590fd33f1b949bcc06169d382d431f60b910d13. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEA1812525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec38d7aaa08468e27beac3654590aa4a377b7ad994c5ab8ab12f2ccfacac919. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACR1669227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb5cc26022a667cc7c2ae13077197ce014dc140291e7597ff28e5db3771c2ea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCADU1892209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb5cc26022a667cc7c2ae13077197ce014dc140291e7597ff28e5db3771c2ea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADU1892209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ca578c7e3357ef6ad4e570da58d8fe06a12f0153cd87cdddbceaf5aaf5166a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADK1734323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bcf2bd51c429fb71e6c2e0c237b7a21bafbb4af91e241e7c2b1b60b3497885. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADA1759981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ed86589b12e98580d0762d53d3d8c13a900ed16cfb248053415e6bc30a0e98. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACU1642556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec38d7aaa08468e27beac3654590aa4a377b7ad994c5ab8ab12f2ccfacac919. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACR1669227.