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 0x3b3f77c002aa46a49ffae9198b3ae810122bfc2e405ff79341d1199e6e760741. 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/06e7c225-ca90-49f6-b941-cb6088622229.json and https://artists.proofprofile.net/proofs/artist/06e7c225-ca90-49f6-b941-cb6088622229.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 0x5f98b5063c0227fc4493dc3185536f1f60c4f82c93ed0ce9fa242f54ea12067d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GRLE10100572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78af1ce8277688acfaae8c1f7c61a459589527237ed13f2ffe798f30b4a7295d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:03:33Z), 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/GRLE10100573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98da967e5eac0ae476b86b73399cecb163fd348b885974707e64fcc408ac4918. 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/GRLE10100577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16830432408ed8627ba6912a543579b7133381311115cf5ed680dc484bd861e0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRLE10100578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a8c0b593420044f88df3a9bb4e1b1eeff7d9ce40ac2694773d8525b69d4811. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GRMEM2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e9227823201afaa3d7115b30851c7c031ac4f9d2beef1003820c1a2b26fe41. 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/GRMEM2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89222b0a890e77afd0a08e74e7baa13789b0f3ccbaf826a5ba50fa9b5eb79ed8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRMEM2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c3a20599903a1ea3646eb9f8a42a33d30e8c9cb2092230c0289aa1cdaa11d6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GRLE10300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362081289dc73ac0d3fab01729d18613491cdbc77c52c55b892ca865e90a931b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:05:26Z), 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/GRLE10300335.