Mari Silje Samuelsen (born 21 December 1984) is a Norwegian violinist. Early life and education Samuelsen grew up in Hamar, and began playing violin at age three at a local music school outside the c
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5edeb6361ab66f12da7488ff6b94e1c9f7a7466f72bb55af223c916f03ad3e. 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/5f6c37d0-63d4-49df-8c88-94e61759362d.json and https://artists.proofprofile.net/proofs/artist/5f6c37d0-63d4-49df-8c88-94e61759362d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb470624ad7ecc50709e1bb5d7b2654d0b36eca733f7ae5f218cf7cea83a3a9fd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBUM71501021.
Fratres For Violin, String Orchestra & Percussion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bacc9d4348026f0cc1e356673bdc307584e9ede707944952465e30bc6bb6447. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBUM71501024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e3ceef0017a10944e2b8583b10c11849269239d42a92e2454aedea8e1b36d9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBUM71501025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df19c64e6d5f93b62da943e7a5dacd477c65c1b383209f6aab2bfabbe166c90. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBUM71501026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5fa2d4903795d1f0f4b9e8b0291750aef85d222a0169ef8da40b5fb12dc5b5. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBUM71501022.
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 0x40b22e47a4e8a544e14feaa2ebd78046b122b93dbe905009fb17a3686b975ebd. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBUM71501023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2037523a4c65aa61b2ee8a25f49bb016e62e2f214283931f4c8acf4c26e5c36b. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/GBUM71502817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2549029d89ac0128c5e3f9022d570d333c872b4cf58b3bdb4b9542e6d175af. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBUM71700634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656d3fd26abfcf9e386a54e586393ab9cae2ff3e2e987e59d2dbb5ba32527d98. 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/GBUM71700635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b71d8fc24cfda30b4eb2f98bd1f91ff418459e819bff87ed6f280e84268066. 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/GBUM71700636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63617a2adcb44ec5a4598599cdacd0ebde13ff3c62078354d3be23587c7e237. 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/GBUM71700637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccfba465d87b4692d394772392ddb53095e93a4e5d9b3f7eed8bf7d47d1950e. 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/GBUM71700638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead7694daf1eb3a32138e6ca37068e16e1bf7279d761717b0c9487e054337291. 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/GBUM71700639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6d118f7e8fc9b40f5646f3b0910c9e95efe6de7a3d7fc1b5d1031d27b5839e. 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/GBUM71700640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea09ec9051e4505be26d312669e787ca097f8bfb707c609577cf7c40ab4d8c5d. 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/GBUM71700641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c021b08a233bb06895ef74fe0996b8116b1aee3f7995257cde3bfde6470142b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBUM71700642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6be84ce1bd61ec49607ae29fc78610e7f1ac50dcb863939bb03c6ab4ee34aaa. 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/GBUM71700643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf566d65207db07721d5580d2890edf796e67e4775697fd29de407b1b43cf5a9. 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/GBUM71700644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3927ded46e395e22818323f8672a0480c2b3570342a358c0d01868669f2283b4. 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/GBUM71700645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002f31bdf7e674d1c661c3f0fa85b8d82a0880df0d1dd6ea7ce01c285125cdec. 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/DEN961900600.
All Human Beings - Narrated by Sheila Atim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bb9605b13f8d1acf459711deb1a4d6ed52ed542400cd3d3a7d5a78305fdd66. 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/GBUM72006447.
Todos los Seres Humanos - Narrado por María Valverde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0b22e72a68fa8db55fb15a9a71b7d0b8d6bd2800f449af23ea4e53c333b1de. 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/GBUM72006450.
Tous les Êtres Humains - Narré par Golshifteh Farahani
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae02d096a126b8ac8c0c39ee7ff66b619d1eee4ab2e981cbea103dc055c6cc5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBUM72006451.
Alle Menschen - Gesprochen von Nina Hoss
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebdc8ccce5029716a5b9c7ecbdee3df1221f2e00f6f74698c67f8aadd7132a4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBUM72006449.
The Echoes of Women - International Women's Day 2024
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91ff38d5a658ce6022eaaa7523162c79825d800012783a27498e6f8942d0d1d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEN962102900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e993bce7c10be2e8da484577a9cfc1bc2bba7ddfb5354fe0f6280e32932f272. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBUM72002461.
Richter: Hearing Voices 1 - Movement study Edit 1
Spaceman (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2839f85dba93fc8856242e8bf299d766d9dc7c5024354c48d69ee4ad9ada4af9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBUM72400521.
Richter: Hearing Voices 2 - Movement Study Edit 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28e4735a2aa0ddddc07e1d18ca652b3d159eb0282a660c2c36979f0dd0525c0. 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/GBUM72400522.
Alle Mensen - Gesproken door Marieke Lucas Rijneveld
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a258fc5d4d37a141d33bfa0b98da1b430c1ba23847d83b050827b54ddbbbda9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBUM72006448.