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 0x5fa62d9881872cf128c11a4f511d7b623e285ccdb4fa5161fc36b60fac833ddd. 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/6ab2ce26-12e8-4df6-af4f-ccce0a4fbc9b.json and https://artists.proofprofile.net/proofs/artist/6ab2ce26-12e8-4df6-af4f-ccce0a4fbc9b.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 0x5f02ca3d0c2f5a811942406cc37c1afb64e7a4dfb07cdb9a6aa7c84b80d240a3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/US83Z1826791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910f105a0280f5358154802ae33262a674e6c21ec6fd36994e675b6d00b590e2. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/AUBEC1838651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c370bce64963cb1d112d463638de56244dad778749c08bd3cb4fe67e302457. 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/US83Z1901059.
Urfa`nin Etrafi Dumanli Daglar - Anatolian Sessions Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd554f4c1e394c6bb429c8c59a197fe637bfae4c5ff51464c420d694721e13ce. 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/US83Z1901065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18031bcc2ff5a6ab57badb9d83058be0b98e21a8a5cbc481b7998e2865340261. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/US83Z1912341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67061c8c399b7364c485e10b986e83392e15b49a38e36ea153964e4abe86ca32. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/US83Z1912342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291708399f2c1fefffa4db2ebfd32327c08f11cb6fff3f8ba491b638bd366e15. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/US83Z1912343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5484e90645eb87dbd4cbc556f80402bbccda90cf9f89ce7d5e4d514ae41e1539. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US83Z1935075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74456cde2a99cb59baa06dbf7ee66ffb41def82147ecece36453ac9a16d4fbe5. 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/DEH742001768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74f545d1f82a7743ab7d416efefc52542d8d9fc0558780349355d654d61eb9d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/FR6F31716860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b2bd385fed3522fbea4a90d663ba43a821027409433987cc6cbe8c31e93139. 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/US83Z2041504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568d542167edd53507e8d308a26fe45b75a680a6adaee5017c36719b626181fe. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/US83Z2041505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9e3c2f75e5f39bc95733b5ec562a30c92c6d7d2373ff5bcfd19cf24514c137. 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/US83Z2041503.