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 0x6cf866eadafc5bc22f71d77721fd2f07bac8ebca06d43b9e5bcd904302b0553e. 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/0505c5ec-c956-4e94-928e-a169c02500cd.json and https://artists.proofprofile.net/proofs/artist/0505c5ec-c956-4e94-928e-a169c02500cd.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 0xfe7bb7fad568c0a026a7078400ae1a0d83557d8c9f1ad9fff0bc459be4d19892. 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/GBSMU2733437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f86dbb40cec401ae396fd6cd41841a523f06bc0d018d2fb6591cbadf4ed8998. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:51:17Z), 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/GBSMU3142746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3202ff6e18364598233f2299103d06cb5b1543e17ffc33b42394334c4c4e8b5f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLO381903140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32af0a487d9e432696ebd855541e39445b58d54acf38ea7be7e676f4bf6eb97. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/PLO382003277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9a3b0428d7c98ec63d989de089de57fd87f5db82af25811ea9259e6a436f23. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLO382003319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97faeaeb125bd0ffc77a354c36a49b4dee77950c1bba2fdfec45464bb8b70781. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:29:27Z), 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/PLO382103498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e128ee9400da599f285ca59317be9ca470e6783d3a138433892bf6e53c817c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLO382200068.
Prima Sort (Truskaweczka) [Levelon Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bebaae286237c5a69c60050b623ecdd9d7325f249e1bb84c4c270232ae980a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLO382300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670bfb6fe5bdd67cc5c4eac935b5f81e3319748e017c6ff20a725931618e8875. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/PLO382300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609550aee3e1091b60cf61384970f60a7f38021bc3999437edc713f8021172c1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLO382400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516b316ca4368984a2c4b66520a6a905c4f64a9b68fb6fc88ff8ed50bcb8d52e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:53:52Z), 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/PLR862400678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf75ca8d06d29172452e2e3a4cda5a2297f7e5f8ba8b988616b409d101acb57. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLO382400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dceac9f740a851a48b66be0458788ae12c6fc4ad45d612ad44a8e9be5debde. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLO382400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9782d2355f2bcef80aaff1798d354e23874f3f8a15b4c423a17627360e234e. 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/PLH752400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a86ae57fd9e0aab921f921b2b212728dafcd9ca253a31356ea280f24df45237. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/PLO382400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138fe5c41fb172148a85a488fd078080600030b44ffac49ebab24094351810a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLH752500010.