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 0xeef1e03afeefea2ecc40a4a90987d5757e684d3e357cd2d093f84445c0ce9cbc. 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/3183f749-3247-4bd0-b012-9ef7c0826d29.json and https://artists.proofprofile.net/proofs/artist/3183f749-3247-4bd0-b012-9ef7c0826d29.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 0xdc767e25103c89538c4215e88726c1bd5694251246a98fb303e18b7c2b2d8980. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FIPEB2100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a63c5d9f51db297764448317a8f09b0d1802bfcbe51788e9deb9bb97beaea21. 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/FIPEB2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164d354e46434f5292402dca77024480c0941ed6b84152aa90584171931c5910. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/FIPEB2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797db4fd9c15766530e65bab4b098e92a63684d34541e5e113472f32cb9e33bc. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/FIPEB2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f36cf0f2b682019adc30e103c5dc7584ced0da89c120eb33ac0dc096ad97fb. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FIPEB2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad81c0369ffb8decde814a30aa4fd7829ea91042135c97b74e15c965238cc10c. 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/FIPEB2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f2ffc1fa004f2820d1f9649584f0ca20b80a2ff39a8671b14e1510cde34b36. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FIPEB2300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fac9c0540546a5bc4bcf453b4b2cbfd7178be99dc256faa8dccad94c1ff1102. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FIPEB2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437981b6cf18fe62cda20af35f5deb4d4c7b8cc4a1cb011cc94ee1929a76101e. 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/FIPEB2400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffca49b03dbeec979a1ee9655f5b8e4597998c0764239e72fb3583511baef6b. 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/FIPEB2400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7927de538a04d40fc62cd42a7ed735873a6c12df2be2935e6486105c84d57287. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/FIPEB2400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f2ffc1fa004f2820d1f9649584f0ca20b80a2ff39a8671b14e1510cde34b36. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FIPEB2300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fac9c0540546a5bc4bcf453b4b2cbfd7178be99dc256faa8dccad94c1ff1102. 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/FIPEB2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd7fb77fbc60e124f111f67bea032235ed4d12686689a4969b98bcd99e16e81. 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/FIPEB2400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437981b6cf18fe62cda20af35f5deb4d4c7b8cc4a1cb011cc94ee1929a76101e. 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/FIPEB2400135.