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 0x87fc01c9ec4afb8fbf62165bd1c18f19f95ee34874775d9a80b026387b760a03. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9833ccdf-c8d2-4ab4-aac5-3e7b93c48d6e.json and https://artists.proofprofile.net/proofs/artist/9833ccdf-c8d2-4ab4-aac5-3e7b93c48d6e.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 0xf0355c524beb31fe1c436bca8a0037602ba713532571683a4418d5b2d7f38627. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:02:55Z), 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/QZK6K2369953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c6405c724cece3dcad8beccc688e541b4505846095d2195971b008952f9c96. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6K2369956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28ffe4a61e72ba4072cd15a3d3feaaedaac0f279b294dc92f69a45c0414312b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6K2369952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cec5b286f0e03f4c4011f8fe9fc2dec9f890d8c923b3e658060cccee195329. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZK6K2369954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f125fdf6ba6f93374e930534ed7712ec6f8cdc7974cb04a608433faad6c336. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6K2369955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa479db954344b4eedefca4e2361c810f7e85fbbe95600042a90d6da85de415e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN72495171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2756ed1bd692894642d084291a6e39247635b2cebfe879a879dbb5f8ee7bba0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:06:48Z), 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/QZHN72495172.