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 0x5a03c7549fdb13c27baeca28191d006d04717de38f9ab3249928c4b768886c60. 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/38ae38af-02ae-411f-88b1-21478105d5eb.json and https://artists.proofprofile.net/proofs/artist/38ae38af-02ae-411f-88b1-21478105d5eb.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 0xbb589fe8a8522fc8c3bdc7a10919eaeaa10862b25cd724e2390ceabb05657ba5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DKELA0300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3653ceb8dc72abf9029d5b30211cbf7fb935b34cc3e9cdf7bdc564931597f7c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DKELA0300710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a32a251636a5814fefb07fdb12bc791ae8cd1646d4d8ad0ecf8e3e243dfa7e. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/DKELA0500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48351c1e300b2d82874f2ad6aaf0f5fdb27025fb608a42499b5ffbc4f1a62133. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/DKELA0500307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad35850c29f4b1dc2255e6ce9014b85a401af331a881ef689fdbd1664a932104. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:54Z), 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/DKELA0700601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd40c590bfef137c9cb2d53268449086ad277ed629ac62e714af345068f8b9dc. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DKELA1100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ba1dea76921e58c51dd58e451a19f9f2290d4b5472e6d0f5e8ee3ce565825d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:42:01Z), 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/DKELA1100203.