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 0x40496ad02fc23a4e8ab34c2a3faa91cca567ee856df1bb159ea49d596434b04c. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6dd2844-326b-462d-bdc2-87feffb693c3.json and https://artists.proofprofile.net/proofs/artist/c6dd2844-326b-462d-bdc2-87feffb693c3.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 0x6ac6ebc268473294660fd5c35aadcd1dd66251fd496d7fd6a10f4fe9796c8c6e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA101300753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eeaeccf89bdb5abfba88a717e3202ccfe107cfe90a26c55f44dc5effe1e326. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/LVA101300754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4e2cb07e59a24b66fa4af44aa65209ba3de1e98e6b035885e556f6af9c0b27. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/LVA101300755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a232db333adf17f7e5794e2eb79a79c64789d0204ff89235d7c7d033e5a5d6c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA101300756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfbaef60265817a899ccd62c3846b72a3ae6b1cb16bf311eae970256d955b34. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/LVA101300759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093701588fde8959b9c8dddcbe533394b249605ce6f0cd5ea251d518a13db9f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/LVA101300760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71309b3a94ca7191bff1ed6d5378a9967530ddfc1c31df7d40ac42564c7b9773. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/LVA101300761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ce3c9ccdece88e993c5e74dab4719cccbcdda2eb55ba5e5e1fd28ff9ac0dc7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/LVA101300762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e489d75972ce40db5eb67b16f876a7df08ab19ac3db88fb3c9ea751aacebd64. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/LVA101300763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1d37673066491c95c6d3e0ee644b0b5f3d542dc1a8fa146d3c59d713025107. 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/LVA101300764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7b4f2c10f6b2d8b9130e1331c2ef24b2e6cc8966fd5f558d85bb7970ce3dc9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/LVA101300765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8818c4c851478fb055aa2590d8c4359eb0f4029a3c3a4852556deba0ff081e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/LVA101300766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd9b4b81c74c68ea97010767a5a4c6b1a36db9769edbb97e771b3b8258057a4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/LVA101300767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1917d872b21ec2fad365a2b57f5fbbf4f1c9566fe2aa65252c9a9b1d03c50e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/LVA101300768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e884128e1103abe4ca130c8741c9ee4610989f8a03cf06e5dfe1fad319bab0. 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/LVA101300769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7e306d4a74887a1ffac99150004d6ef82a11ebb2408a808f8b89884c184e40. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/LVA101300770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd155b348c2d6d6f671f64bf3144f4dc8d33e3d9ca32cec853f24de216169c7ea. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/LVA101300771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dafb7dbe027dbfaae88b506100824cdeefe8b2bf8012c6b71ca864066dae61. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA101300772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd053110d92c2003dd297764438df3d15bd35aa2a80fbc9b9012d56aa413e17. 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/LVA101300775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7f643411608a3c1241cda4e2943f0a7a2804bd0fe6821f1adf41e2450385ef. 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/LVA101300776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5989658e727dbddd3e90f82e1d1097486ee8e3cf244648fb0879028805cffd37. 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/LVA101300777.