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 0xc7dc6f1e7e2b6d023f6ac1409d1ad0db70ec530fad0def8276692f237f0ccb37. 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/51dd6484-0962-4cae-a633-1c7e7e40bcd9.json and https://artists.proofprofile.net/proofs/artist/51dd6484-0962-4cae-a633-1c7e7e40bcd9.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 0x1b84f665d223d4995ac6b6245c48aa30e74805b08fd803ce8ce5d07b78138e0f. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/BCL662400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ce5fa44f4cff368f479d1db4d5974bf9f2cfd16f19eaada98c17ee498f6630. 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/BCX8H2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd9c42ead35b36897821368da38ad931152ffa9301ece38b1aff63523359f38. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCX8H2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f82b9c3b075b4fe189a6c3965dd64eccef68412faf9fb22ff18aae1146fd846. 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/BCX8H2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d207c044ff2db6862fe6a6872184f090b9f139a4e9997e9c784fa1984472eb. 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/BCX8H2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df8bac6735c39c076e57557f4a72a35b07149c830ca96a00b69d0bbc53726b9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCX8H2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67cc2f386a7e0c970225744dc6a6edbee53bacfb8341450e2ed682b57060a24. 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/BCL662300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97970f5fdfff051f9a460757c7751799ba8632906caf34cceeaf5a090669a03f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BCX8H2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fecca9fd89927c97d5d689a140566304245fc5f68c08620cb0443f096c29234. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCX8H2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf658b9f0182b14d8d644d52e74acf47808addbc62108a3073c3f11e4a8f9c8c1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCX8H2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a9a2b60699d966d08d419dba546d95dfa0aeadd34fe06bb288c7ce591d198. 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/BCX8H2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b84dd6f4cbaa7e2de1f0c69a45fe6e359145f734093962f492f27a2127b5578. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCX8H2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf133bc4bfac48401e96208b7ddef9395119282be3f4c1781b083f159b0d17096. 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/BCX8H2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a9a2b60699d966d08d419dba546d95dfa0aeadd34fe06bb288c7ce591d198. 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/BCX8H2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0bc60c63b80fb58abae5dfd565b32a798c82ccd7948984ed5a9e72ab5dc021. 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/BCX8H2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac8da21a40694dfa091365958465e1edbdfa235cb282371283ee50e3d8f1fdc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCOZ62100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172e2ad36478a4a92ff25b395ace2f9fb2d05bbbd1a618231c4e79d5125362e2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92148940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e03506df6996db83e689acb0c1797a42bc2c2c55ab0edce133cdc6576ecaba. 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/QZGLM2015060.