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 0xd3c19662889badd0e434085b2b25e6337c65f9979e4feac2c30f415595bb4f51. 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/5fee7d90-8e54-4569-8a5b-b0f4c40d8591.json and https://artists.proofprofile.net/proofs/artist/5fee7d90-8e54-4569-8a5b-b0f4c40d8591.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 0x2ed2f2b0d5f21adcc1a72df6192a827aa28a87e6dbb0a1e633c951106c5d48dd. 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/GX8LE2258638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d9d72623446bb92ac1b6e95e110dffd0624675d3eee0e5db863fd11d56c9c7. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GX38U2409783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3086a5c8fbd88944f28c6bb9a73f8f72a5002be62e174b3da31903407c40c4d4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:13:30Z), 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/GX4R52467178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639bee49dccdc91df732356f767c5f3c520485d912c56322ca04a84483bca15d. 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/GX4R52457838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930ae34e4277bb293e170b868358220a104323ae245841ddff54ffb453d9e95a. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:56:03Z), 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/GX5MX2447214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfe2c12c8b809d4ab613b088d000db71ec4cd519123bb6469b75908799e57e0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:02:23Z), 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/GXBDT2432568.