Thomas Otten is a French countertenor singer in the Classical Crossover style. Otten was classically trained as a child, learning piano and singing in chamber choirs. His voice did not break as thoro
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 0xd38fbbb6adc47ee9250652935616813e19065aa6ba310a44d413fed9e740e776. 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/22dbfef7-47cd-4c09-8f00-a33e9a9c3e58.json and https://artists.proofprofile.net/proofs/artist/22dbfef7-47cd-4c09-8f00-a33e9a9c3e58.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 0x809526579e66b7418a58b61a6cc7f5ae3d387c7af5694ccda50297077eb411dd. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FRZ189900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b2c2f026725e2561125f2e86166afbb490590a109eeec2e12ee1a420db58f0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FRZ189900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab90df9bafd07bef9e11977eed57dd658527080afcaa314f54f874a211b70b1a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FRZ189900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ebf0b53facfcba00017696a4600159d2273075bdd24461add57159061b8e2c. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FR58S0200011.
Tristan und Isolde - Piano Transcriptions by Franz Liszt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6536956484f367272c87b08c77e60c52378c904b694a019ad19381f13bd24b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBN3H1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88e98a297cc68b503166bfb24ea904ed634bb203d68a4be21f6a535002ce043. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBN3H1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96cc661d5fb76938dc95670c2271baa1c1c1f5d581fd9f24a78a98a2bc06c75. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBN3H1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0da0cd487c374f8b3537b5ed39ac093d8ac204578b4b27f7093c432831e479. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/GBN3H1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130771257f1d37c4724a1d90eb656be6abaa4d72a1a6ad67a90b9a993446ed7c. 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/FR58S0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118c8636193e4ef552f50d5fd2f0f2232dcc8998a51377d3743430dc81a188a8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USANA1406501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a57cfee0e8fddd7a8a6cffe1da0cc07c3d4c6d4538bf56e32fd6c2b4d2d7f2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USANA1406502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf820184906097b7120c536dbbd548b62e2bd80a63407421d63997e0d7950df. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USANA1406510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad46fad12973bf8c3373b00eb9084e6a25dcd62f3fc04b73c86ee7b6ebabc320. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAGO2207476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2e8a8f21e2aa8bd177f2b46a21d7689849132ba8833fe55acf7c08a3524ca0. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAGO2207583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7eb120ee71fd45626e0312f1074623a081852f21da50b246d0f7109ef4c522. 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/TCAGO2207609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9296bdf167ec96beee63470103d8f319b5a45c89ed48f00d5652c27e0916f7. 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/TCAGO2207649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e786a801ad365b1a07272f3530724d2c79be1a24e272817dc0acdf3b7affc6. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCAJI2553246.