Rob Houchen (born 10 February 1991) is a British stage actor and producer. He is best known for playing Marius in Les Misérables in both its 30th Anniversary international production as well as at the
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 0x701bee5490b5bfd95e247b0e4eb9b4cfc50e55cbec09900cdafd537148b364eb. 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/dd29958c-2b7b-467e-81ba-1f0d748ffa66.json and https://artists.proofprofile.net/proofs/artist/dd29958c-2b7b-467e-81ba-1f0d748ffa66.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 0xfd5cdc33c86120195f14fd186c3c185f1f89abc6144253d210af9ec997cd3040. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBLFP1594820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14873cf02b2f3be4f0f688eb14070d08ee85f353ce61a7ca8f2e1ff02e6e1983. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBLFP1594821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efec58ea6e430b14a42cbc622b02815075d658112bff1ac3ef0896738dbea65. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBLFP1779626.
Let Me Love You (Live at Hoxton Underbelly)
All I Want For Christmas Is You (Acoustic)
A House Is Not a Home (Live at Crazy Coqs)
Used to Be Young / Grown-Up Christmas List (Live at Crazy Coqs)
Les Misérables: The Staged Concert (The Sensational 2020 Live Recording) [Live from the Gielgud Theatre, London]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7291bae88dc12411a238a5a4d99d82350675da50e670a47365a855d655a0df71. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWB12002580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd73c54d6920f3ae3313984f9b000b2668e96bed702ab3070a5418e46167b33. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWB12002565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc424d29256fca2aae6f68b4237df244cbe481e3fc4178c0a666692f8c2b8143a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWB12002566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d47b50a4228472164897418ef86ae41779b9e9eb333736c9ff45aa4ae5f6cd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWB12002572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc684b7f233b32e76f82371b18416096c9c4d32cec50b0d16e7dbbb8d69d2a29. 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/USWB12002581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154b255972b8d99cbad139bfb76b4fba89ae2685eea1a6a5fdda5e218c5d11bc. 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/USWB12002582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54ad2370af1f998cfe8cfeaffa9db25d47b0d45d844d2e743c9c88869421260. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBMA22007185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186318c2f4b7b5cdb90d4325633a7e89cfd630552d7916adc1cbef81cecee553. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBMA22007260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690fa14e4c3565d8d2e4f7436d278cbeed054be82ee9ae12c3e64ae5b532904a. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBMA22007364.
The Monster Mash-Up (I Put A Spell On You / Superstition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ae4ad913bb57740ac7d92f2d3cae5acfe53a583101987b5f84ca8959e1ef17. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/UKXN21996897.
The Royal Academy Musical Theatre Company
Stephen Sondheim's Old Friends: A Celebration (Live at the Sondheim Theatre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608c1db1338b977678f0b1d3398d31a99be1f305a0e0897bec78178f0f2569ed. 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/USRH12300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d115fb6d0744f92fd4c9f07c28a812fa2cb8999d78310437497f3515f694c3. 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/USRH12300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c2340f6fb8b3bffca71596975d7487e14ef26ea1e6d4559d0ed00a0feb3bf6. 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/UKZVX2200126.