thumb|250px|Tobias Meinhart in New York City Tobias Meinhart (born 1983 in Regensburg) is a German modern jazz soprano and tenor saxophonist and composer. Meinhart, who grew up in Wörth an der Donau,
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 0x820d5710858c232bc1abd276a1b634ec7df2131d60dd20d4b3b460e94cd1f2ba. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdaa05b4-f3da-4453-90cb-3b0ac7f3528c.json and https://artists.proofprofile.net/proofs/artist/fdaa05b4-f3da-4453-90cb-3b0ac7f3528c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
After the Rain (feat. Eden Ladin, Matt Penman & Obed Calvaire)
Silencio (feat. Sara Serpa, Charles Altura, Eden Ladin, Matt Penman & Obed Calvaire)
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 0x31e52b94e27ddb48d1616cd36e125f9c007f861f2fe877c025dd75bbd0d98a4a. 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/QMFME2487106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccd306458534d6a4154dc4b508478a2f4645af49c23ad40e331a68e4fd19cf7. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QMFME2487100.
Mr. Vertigo (feat. Charles Altura, Eden Ladin, Matt Penman & Obed Calvaire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2e8183ed8c597c1dc8c34104ce931fe335117b69e6c330aab879f30090865b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMFME2487101.
Sonic River (feat. Eden Ladin, Matt Penman & Obed Calvaire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff43e23b7c5555a2104fa1794f3f4ad940dd62b650f6fd5804559c3c400814e. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QMFME2487102.
Fugue Y (feat. Eden Ladin, Matt Penman & Obed Calvaire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238e5055080ac9f2b562cb29bfd912908e450625304db1ab99082959724a2acd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QMFME2487103.
Where Did You Sleep Last Night? (feat. Charles Altura, Eden Ladin, Matt Penman & Obed Calvaire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f23b30f5b6deaf3a3e260991051f472353d34f672de23fc0c14194022e6778b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QMFME2487104.
The Panther (feat. Sara Serpa, Charles Altura, Eden Ladin, Matt Penman & Obed Calvaire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3654e02294dc9649cfddc0c981a62bf6bcbea74e71be1909480f1528a43fb14. 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/QMFME2487105.
Pinball (feat. Charles Altura, Eden Ladin, Matt Penman & Obed Calvaire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b59d31e5ff12c659439ae8c7fe4d1d8738e302e427fef1d33733217d1e8010. 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/QMFME2487107.
Korean Chant (feat. Eden Ladin, Matt Penman & Obed Calvaire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a44488f940cbddf16279d92d387f49b2e5c59085f07141411f650e57c8caa7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMFME2487108.
Dark Horse (feat. Eden Ladin, Matt Penman & Obed Calvaire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc8eba95eff82d9ef3475a9a2dd3e96340a5fe4f226a9f755b7003242ea9a27. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMFME2487109.