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 0x8427839fd677c2cc83dd1f5ecf0f15b1126d97a1affbfc9796f0b24eb748783a. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28134c1a-8a9a-426c-a65c-417967224492.json and https://artists.proofprofile.net/proofs/artist/28134c1a-8a9a-426c-a65c-417967224492.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 0x70ca04b10c933596b6c383e6908ea273dbd1587c3a5b5b46414ab080790426b8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCACT1683578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc16049b70c7978ca4f603f837ea62d6b0cdc173f45edf5f787854058c9bb73. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USCGH2256528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c3e282b3ad805be02018a752ca371221074b08f65393e24c1b045675a8389a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:06:18Z), 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/USCGH2256529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0315d271a06a27364dfefa51c098cf0ef5fb97b19a674482a6df9972879ed586. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGH2256530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0608ea2fa9069d9c8e7b9985b3204b1d041c7ee0521ce456338a3ca8eeb0f49. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGH2256532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1f576c8c1edc2617204162dda94b355470e78a924093f20161b440e39f2009. 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/USCGH2256533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb640eb8001a49800c5fc61d53621f1cc323587f59c640b14c1bf406bc5c5a9f0. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USCGH2256534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b9e00cd31ec16f27cb16ecfdcfe270efa026417aac083dc6ba5a5d411984dd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USCGH2586707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947ef8a9a07eeafb0cdd0d82b77b2ba51792b6bcb91ea0a984ffb2138104cf78. 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/USCGJ2517256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4364227c97158d6839c206ef5582b53e8b721d07dec55b3b1964401ff62af41e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USCGJ2517251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947ef8a9a07eeafb0cdd0d82b77b2ba51792b6bcb91ea0a984ffb2138104cf78. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:02:29Z), 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/USCGJ2517256.