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 0x0a66d18744ba42cc6c8ca18c7396ea5631343d1a80c44fa3a45b30d7dadb2b37. 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/3cf036a2-7326-47f4-8d91-d6cfa7b1e6b5.json and https://artists.proofprofile.net/proofs/artist/3cf036a2-7326-47f4-8d91-d6cfa7b1e6b5.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 0xbbd6de5d930f7b9b44ac4a4d1eab2295f949e21e68350466f9bc6d70385d15a8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:08Z), 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/QZHZ42267370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93f374f3e200cb20db85eb1248148ee484efe884b57db8a6d5b26fd99e90df1. 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/QZHZ42267372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61f266cc30ef8d402471fd37a312270e093f00bcfc6b51dd313baa43b9cf35e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHZ42267373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3433cfd220d676fcc2b24ac9cf4df47fa9607de3747901eeaa73d3e40f8cbed0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:36:28Z), 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/QZHZ42267375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a53e6d9215f2ab0b1198ec6945edbadd6a05d5ed0e2b0747af311d5dca6257a. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZHZ42267376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec4ada04aa11a32b2edec74d7841d55572bd9f77e8a5c4a022a4534e4182619. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZHZ42267431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168ef65f51a4b086884e7d1b79d271482223d796266d8973e9a3e062e57ea078. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHZ42267439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd2d55ce458addbbbfed2e5c63028c36797ae7ac700b9e6b7ea93811dfc2ec0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHZ42267442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f396e6daf5b967b5b6381e7bb8fd3fedbb5f63895cde6d9ac7f5035058de216. 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/QZHZ42267471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d46cdd352c5b9384b48411b1ff02df46abb0babe2d544d8f56da018d9457a3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHZ42267478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88d60ba517eaf10a3b1fe67bdd2dece8781dce71b86dd659068153be0a26f03. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:27:45Z), 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/QZHZ42267479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94495addb53f5d899993570b0a3d607601355121fe092d1c780070a064c8e80f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:25:07Z), 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/QZHZ42267480.