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 0x2a6ebaebde9b66bdf09adc6c72e99e2fa1c442d51eacaa69377871021cd7dd94. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ace5c71c-4c49-4d35-8b7b-cb582650dfb4.json and https://artists.proofprofile.net/proofs/artist/ace5c71c-4c49-4d35-8b7b-cb582650dfb4.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 0x3a5ef27f934bdb497a6766ce7cd23eb6f75037cdcfdd5b7ce5bfabab27fd9c29. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCADH1722487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26de628b17118e678b5bbf11e128a9f5f6cc5d6202c87cb6065f13747f56201. 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/QM4DW1806549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c752314675f36d3d0b346f286c233b8312ee6d712df86e3538f90539473b47. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/UKXN22265953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806c7403d0cdbfa96da06fc70c56a56f80b118f134b36406859fce290da06230. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBLFP2311939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63692d4a491b07884c2a60e37f2d6e44a1e80ba87de03145a3710b6094b898e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GBLFP2371142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d63edd7cb2ab459d54d255ab86322d061a0e315a03312fc10ebdd35aa2957e3. 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/UKXN22391994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdf5f6aaeb024b0231ceacb6e7e9b452c647222cb7f17096974056efa0cccb3. 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/GX53U2392874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebd341c33f9b073606a82e641caa4e5056298db4a62f6500574006781824a64. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/UKXN22556466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4e802bf66baf19f6a05ec6f192384ebc15642c950e72e17636c72542e49f1b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:22:08Z), 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/UKXN22551807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5157ca72472655e51747426cd8bc9bb138ed184fef61090020b0c551aee5bec. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:03Z), 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/GX3Q92533532.