Matthias Meyer is a German evolutionary geneticist working primarily with ancient DNA. Meyer is the leader of the Advanced DNA sequencing techniques group at the Max Planck Institute for Evolutionary
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 0xde5f89e94c9684fe14bd2cb1250f6b291a15d0b2d08fb8353b8b05b302b42447. 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/5dbff91c-6e05-4b24-8c15-d791509194ff.json and https://artists.proofprofile.net/proofs/artist/5dbff91c-6e05-4b24-8c15-d791509194ff.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 0x44192a118c99ebe91b776987a0cf529708051f2dde0fcea015121351ec2f80ba. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEDL81100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaf7b5a26365e258dea83a0cd4872b07ec049c0c196ee8d5879ee6611cb3cab. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DEPX41400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e32b6265b63567e0101dad7ee478c48c4172649ce45468e3e1930ad0e473910. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DEPX41600166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9f0399c46bcca9ff818f3eae5acaeb7b4e06d596a1d8161c76143393bcb0fb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEPX41800269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2830cb187c409857c3b8466d6b3c26ec5abb41a818ccbf8f64d741e4d702c853. 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/DEPX41800270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ec6a2b85c2ee2f1b442db340717c2aa4467df2325e1e8dd7407826928141ed. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DECY52000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6770a3a94ca3d5649234cd9ede93a915877d1f041c91543d9caf24156babbd1d. 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/DEPX42000373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44431858d4796e545e6faaf06bef8753a83a9cb78ac8f68ea3a3326160c1a5f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEPX42100460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049988433973e6afd1b28b9c67c86f2473cc2b4d89c54a457abf208edff968ff. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DECY52102701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fdcc1a8361b17feface0786265e2363147e918452bf3dcf510637e064939d7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:56:50Z), 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/DECY52102702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5da183d549c44b412945b5dc6586f7eeb7a45683683b0232e6dda0c5c41953. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEPX42200554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9beaff391c27fedc0d268944bba71b26ed46fdf626e97a276e8303ea8bf8f9. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/DEPX42200588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75351eb819a5f3934c74ba5d2c4d53cd02e92288d57693079f9bdbe7f85179a2. 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/GBEWA1502026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec030609472e25f9b373fa76e2741fffa239c3309fa84836fbc754357b43819. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEPX41300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fc06673c317e89fe8987e0d6ad967df17464fdd55b4b1fd8dd9a23ead49645. 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/DEPX41700225.