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 0xca42186a1c5d338840bc71384b099a796a5583254be331efa746092913904857. 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/18f7cf0b-2c69-48fc-9fc0-340ac5903171.json and https://artists.proofprofile.net/proofs/artist/18f7cf0b-2c69-48fc-9fc0-340ac5903171.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 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 0xd51446aa235eec7d00c4b5381a3cf07f4606a36848954e36b7900165753d066f. 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/NOFCT1806080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87304b33213cd10bc8193226ecc00f519593f0caedc579fcde674b543edd2f33. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/NORYA2003040.
The Moon Is a Harsh Mistress (Quarantine Recordings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5131b8e1996259ed243f54fa2b2fd42864ad8b30cccc87e7ae1bbcd633e03a4f. 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/NO2DY2200388.
Excerpts from “The Identity of Belonging”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb113b9ed2b81559a52a59f30642d1cd6a452bd03fb222a9751b5278ba36976fe. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NOMIX2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3918ace4855b8e3eff123432bf86aa682f3e7175d6ec865f93aef415abb143dc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NOMIX2401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb113b9ed2b81559a52a59f30642d1cd6a452bd03fb222a9751b5278ba36976fe. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/NOMIX2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf6f1014ef99f1443968a0b8e078b28acfeaadd0cad6432dcf570abee96a018. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/NOMIX2401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7423dff2a7eab53c506dd9c3c8ae38fdcd0de820682b47eb54858335330e1d52. 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/NOMIX2401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3918ace4855b8e3eff123432bf86aa682f3e7175d6ec865f93aef415abb143dc. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/NOMIX2401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79da51ca03136b66d17394304a3307c085840a0c72b7dda5c9a131c41773c652. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/NOMIX2401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4778a726cb6cd5c52902f5622e3d7252b554bfc721c0072bfca46f8e007d7aa7. 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/NOMIX2401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe440c1376bb6f3cff99352c1d00508b233c04e939694feb3cc4a3ebf269d8f. 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/NOMIX2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118d9a879d2944502bcd9ff0f83319cbdd0469d27947d35fb1464db586babfaf. 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/NOMIX2401061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5664bc9c52918002fb9f1fda0e43a00977fb1b33fa61d58b5dd5659193b9f9ee. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/NOMIX2401051.