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 0xae9a51f3cd95c9f87e0b51bf1b6bd6356b2b9efe3897a90820a8bfd7c78aa833. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d41a6c38-b5ee-42d2-94a4-3df865582489.json and https://artists.proofprofile.net/proofs/artist/d41a6c38-b5ee-42d2-94a4-3df865582489.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 0xf1d4fb74cde897c71daca6a4c42c2fed1ee594a216a8cf757a958dee800763dc. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZGLS2414777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080003c262ca3b4de701f93089a34fc9ee7ce8a9291e17895aa5a67300f39b14. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US7VG2516389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a9a5736ba434e0784b30059531ea90be13db636af7d8ce65535e5fb18556fa. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZGLS2517492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f60dd3a4403c1c97b6af92d87ac257f18f6913172222bd0c92cca884cfc886. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMZ92522834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457a76ae95d56a4978d40394315e7ece3503c7f119e2759f9e92d1d203e8432f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-19T23:41:12Z), 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/QZMZ92522835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401aaed7a804bd6f3f62a5421c5561196629917184fee57c2acc2f6b33d55615. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:18:15Z), 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/QZMZ92522836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8712b441d34d40d3a72390bd95777816cb7306c7d0a60e4fb758be0db9c67af5. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:59:50Z), 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/QZMZ92522837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf28814a9cd971576a65dae6bb11b1b71b454f15b1ffcb95345b879af11a6c33. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMZ92522838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cdf791110046aa3070ede4b402cec8dd8d22fb6f648d7ebab67b3254a1e3ba. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:02Z), 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/QZMZ92522839.