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 0x4bb95dec1a14715f805ad32675337b917bdd5b4cc38b93ab3a4c417db4989db6. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa050d15-f317-465b-bcc3-969db103e2e0.json and https://artists.proofprofile.net/proofs/artist/aa050d15-f317-465b-bcc3-969db103e2e0.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 0x642c2da0cb0f61721ea9e699970511b164bb913977f9b877948517b16b0e8aaf. 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/GXHAF2538176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadadc1e429cbe1f4eb8434e7d2636ec2ff1df73f20987f7455c2f2d95c0a6a0. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GXHAF2538177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8910cc4875ae4bcd75b53a0b2754b6ce46c09c3f5e7167145b710da5cc56a951. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:55:43Z), 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/GXHAF2538178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350de1aaec2863e44b0ca8813a61ccf25d781229398d558eb90037527e2aeeba. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T11:05:02Z), 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/GXHAF2538179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b54cc077c87341c3997d1fe6eafc38afb6886c620549e23e028b9c909b120c4. 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/GXHAF2538180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660bd98c18683a8ce49809ca4da99aec7b52f88d892b6aa08a630ab0bef193fb. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:46Z), 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/GXHAF2538181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68043ae425375d8b1b5c86744a822f1e86a32cf47d6bf662eea1a957f4bed5cb. 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/GXHAF2538182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0295251cf4a6dacf07a1e73205ade8e1a390a889f9115e085786399852a5a5d7. 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/GXHAF2538183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39325fc7e79e819d44b0dd5610a8ec5eb5660c80b8cf6255f918b1503c5089ad. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:14Z), 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/GXHAF2538184.