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 0xb4e32df0346b33aa581176fee275490e45a9bbe656648eb87662483e56e422f7. 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/ce5126fa-c2cf-4720-a4fd-6c5e162020f2.json and https://artists.proofprofile.net/proofs/artist/ce5126fa-c2cf-4720-a4fd-6c5e162020f2.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 0xe8c6b983243b8a6eb8efa76997693ff3da94aa62f796c313083d178b008531e8. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZYHM2368313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064fe7a3275ee8554be5926dfc94552e7cab4bd5c0096fbbb52666b6801efeda. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:09:43Z), 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/QZYHM2368995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c7f0e426b0b62ee982362972dee0985571e3bf0f986ddde2df4813535ffc4. 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/QZYHM2369417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa0fefa574eb0cc76ed2a144af48e507b69811ffddaf202b2a8678e4b67eda3. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZYHM2373695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5201fc32d863ab0deed9be96eb2891ea46a40a8d974b741b290a5b88dc1922c1. 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/QZYHM2405021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e592025bae439b162ed5c8f375766e2eab19538b4ac5919fdd738503af80c. 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/QZYHM2406181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c4ab48fd4b5e71389b1c63ec4e99ca01b83365c10f70a5809d2b295b71c258. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/QZYHM2407980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc6428c27825a99d69953543f7b0a4ef0de27ddb9084d76ec4dacfe24edaeea. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZYHM2412919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f8a7495b38995fb2babfdf67a8361afce9ac0fdd0dc5bde096c18e0d22e73c. 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/QZYHM2416279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cf243b4bf50ed266946e44d4c87e8952c0a92cdceb9b30fad1369b4dc8e06f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZYHM2418115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0133b8feb710a27e595e76f91cbfce471bc1dc6188189d81f5e14f0c73da8bdb. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZYHM2420968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b807d3b67f360a224d0ad0ff7d8955f125209dcd7ebc938f3bf6a002975ead8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZYHM2424026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d369477fdc6dce8ad5293fd24dc4045e727c6afffedfe0d9cdeb6528391c9d4. 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/QMDA72425781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9a8bff7cde2bb1d73aba74650b925f17a0043be95cd78dfb8b963a89fb5827. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:19:33Z), 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/QMFMF2449569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f37996dbab0231141cff366a67dc5b488653427c35de672d518e29ee85ac28a. 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/FR2X42518811.