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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1160e291f4ca5ad21d75361bb377148c83ddb537b0a6c5f7deb118d3eeab7a. 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/1c335f6a-b231-417d-b736-b7740b9360d7.json and https://artists.proofprofile.net/proofs/artist/1c335f6a-b231-417d-b736-b7740b9360d7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Impilo (feat. 2woBunnies, MaWhoo, Leandra.Vert, Toby Franco, Gilano & Sponge 101)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9967c15fdcb1e396de2d61c0e5344214509f1197523d08853f5c88521f257e9. 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/ZA34K2301505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9543a7fbf88fd9377d20ae5257fee1bd74a35b47af050676f9bdfec639b66d3. 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/ZA6EE2000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1d69ce519a020882c1c713b387a98ea9e8f77a97fc83c1767d18363d07569a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZB7PD2476058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f2fb7f13e3ca39895f76eead1438b91ff29ae9baa07f6afd2d27414ef6926e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZA6EE2000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c7f2a75882971bf4fc6762ce65216b49fe5115394e3164ff1efcf1b6c30ea1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA6EE2000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836236b6400270c18fa8215a094cad51ca21aa02ae7e904060d6b5c6f56df8d9. 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/ZA6EE2000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd7dccf7d2db9c52e0c6e25d2144fd8bf0dded476feef92ed7e4f88f577b848. 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/ZA6EE2000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca754aeb9351563732f32d02459dbd0430f09c110eced7142a1801c3f87bf31. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZA6EE2000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0f286722c96f3869aa85144ede228e9004ba3db7d7892ce5422130d1ee2d14. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA6EE2000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268c625ee4808628a14c43f6658ef021695c2b7bfe0b1ae1f7ad47469b398705. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZA6EE2000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f82749182b1a3072fa78f0096835e425dc99f80b2862eead808a37464b47ee. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZWV32387073.