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 0xc9734f323c83b22db6a8ae29792fd1e8232f3a0b4bdfad7724187fbbbfd3161a. 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/9e2b80ab-bde5-4d59-ae71-ce6fe247634c.json and https://artists.proofprofile.net/proofs/artist/9e2b80ab-bde5-4d59-ae71-ce6fe247634c.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 0x6a3139f7e1739a051d1c68256f9936a0a2ef36bba00720b4573aa181e7fafba5. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZS642148044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010eafa6a47df9e01fb1f7c50f1d7a676e6489690edc12efe0cdae80e0717ae1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN72360573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf271ebef04d662955e0827db892bce072bf83c6e21e4735134590e724e77d9af. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:45Z), 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/QZK6H2393255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e272f516debdf1db4560b5aa52d1f0f1268c277e76834f973d5a90d1c48fa3. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6G2440727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e913965a3db8db2f304b2613a5181c29e6d3d24462aeadba2331b215e14a01e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMER2424383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3aee29706e6a2fa0c25e62f19c2467149e9ec375b2e5a2c8accf2a967951fb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:47Z), 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/QZWFE2412320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00835022470e86f0a334e196453d6b96f8ff98d6df16a5cab77afcaebdfa5318. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:46:16Z), 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/QZZ782474829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71614917745bb51bd3682ad12142dbd346027e0048a03e452b8d3e56c07ff7e1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:44:59Z), 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/QZFZ42589874.