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 0xd73065bf03e8e79bedc90efbdadca819ade53c9930aa7e7fac87aa4f61fdac0a. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bf76153-d739-47e5-b0d1-761baaf3264c.json and https://artists.proofprofile.net/proofs/artist/5bf76153-d739-47e5-b0d1-761baaf3264c.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 0x166f01ed9b9d41ff675c3ecbdf013dcfa68c50d34879b37f3bfe3c98e76675b4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM4TW2555180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f11cc6898c6fee92984b7d8236a22998b408ee84cd19243ee94a9ded4cb5592. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:13Z), 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/QM4TW2364280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33df1ce6fa93b2c468284c4a101a1f98f4f2de72237857c987769d6d6c4ab8d6. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QM6P42333302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe689bb0564d3876f4bc2758719ef4564a7cf8c1f3eeb093098e665f6129b8a7b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QMDA72356500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e6205697baa7dea21767749a0736e5ffbe35e18ecc7929ad94fc5c6a679e17. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/FI3FC2551405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166f01ed9b9d41ff675c3ecbdf013dcfa68c50d34879b37f3bfe3c98e76675b4. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QM4TW2555180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a1b8f8a1c1441f1e03581e1deaff312984406605afb921bbe00e7a5df76a7a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FI3FC2551407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075f41103758d988c3307ef549aa100af57a57ba1344802e983565633109fce4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FI3FC2551408.