Alexander Harry Kotz (born 20 December 1992), known professionally as Elderbrook, is an English electronic musician and DJ. His career began in 2015 when he released his first EP containing the song "
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 0xb734fef62a3b0053d2a8ee0905f8753af5fa4f5850da69a2292eb48b3387830c. 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/f1e3bf88-d4d3-4fc1-88f5-6b10ed5dbd81.json and https://artists.proofprofile.net/proofs/artist/f1e3bf88-d4d3-4fc1-88f5-6b10ed5dbd81.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 0xc61ce51dbe252275d648aa5db9649d25c1e0edbbdeec155e1a4bdc905751a3ae. 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/US39N2305316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda806ba58da9cbf7821fcb54eba68763b44a31718f8888b15fe6ffa81140d4f8. 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/US39N2201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea77ac6d724f3bc87f95261706b2e8fc043cf6486e7bc29ef385f7845902b39. 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/US39N2201673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65600b047d2eae8c71ace599422c8159d5c084a965192e558531591a52f2fed6. 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/US38Y2411864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5c02b5b03f181003f3544a58ddf6e463e4d86a7764ebf20535595e60ff3412. 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/US38Y2411494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa996cdfb6dc5a9e73166dbd1e9bd6c8a77e13b26099109644cd4357dbce9dd8. 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/US38Y2411865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3259e958e474f07a06ae5d506d4e42331874c3c9725b813ecdb85564c96826. 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/US38Y2411866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6191b03d8d5d1e4a3d4f9d17a9b72e37e6ed0be9ab4bbb566b0f34fa8064193b. 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/US38Y2411867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535f1d2c6b07bcce89250b63b946a6ead3238174056c83ee1b7657b51ab1b35a. 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/US38Y2411868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd72d18e2ab14b7bebbda653dbdf297724a3f2d3ad80e9030b93a324212eaf4. 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/US38Y2411869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826b9f0b39fac873e835e6ecfab564795653c2081f9c3fcc379d63212bf4ff67. 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/US38Y2406795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5372dd5ce67fbf751da6f6821379c05d5767e330818509d8300ceb52dc7aeda. 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/US38Y2411870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a4e8bd5d79b32ceedae20eda4d22181002a21f78e32bbbd6192b115a3f8474. 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/US38Y2411871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f41c2d44c520031325b2748e9dd49bcdd792fb30192ac3e2672014f39885647. 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/US38Y2411872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff77006b5873352ad842555a6bec93764f751d9c50626d0d8239244e00d18ce. 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/US38Y2411971.
Something About You (with Rudimental) [Mason Maynard Remix]
Something About You (with Rudimental) - Mason Maynard Remix Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf247e6434da98e86f7ba12a99fb65d45b5179f4c3ceacde353a479406dc8ae17. 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/GBAYE1901395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2866339b71c5dfed494aa094c5d5c0ebc9603de68cc754a88c40aa84660309. 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/AUFF02200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5964a2c6c0cd97151f2cdab991086be3f3e75613a8294bffd82ef1454863065b. 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/GBTDG1302600.
One By One (feat. Elderbrook & Andhim) - Vintage Culture Remix
One By One (feat. Elderbrook & Andhim) [Vintage Culture Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cd255d75ceed23a7fa30247eaec5e1fed049564f9a624f06ab8261b77a6501. 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/USZ4V2100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ad28a4e60402a7e01d9b589e3fa84fcfc5968e062607887eb58bfcfcf767a8. 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/USZ4V2100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d588a65f28f93a306034c993bf8ec2f1f35a345dfe5028118db1117b9bfbd27. 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/GBARL2001089.
On Your Own (feat. Elderbrook) (Fort Romeau Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea67203d9c65070a450975998c3aeae4411f084d584f36540d743d23be4da247. 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/AUFF02200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4423cb4aa1bd0ab3d56f30975722703efec49feea977c544cfa7912b8067d33a. 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/GBEWA2204460.
Jockey Club, Music for Dreams - the Sunset Sessions, Vol. 6 - Compiled by Kenneth Bager
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab8288f59ad1ec4d6003c22faec49cc1baca67f82daebf039367e31d6304431. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/GBCPZ1712561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ad28a4e60402a7e01d9b589e3fa84fcfc5968e062607887eb58bfcfcf767a8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USZ4V2100084.
One By One (feat. Elderbrook & Andhim) - Sofia Kourtesis Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d53ddbf759cf251ed0ddab3787978331433c70e0e952c5ffbf1705aaac93ccb. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:34:32Z), 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/USZ4V2100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c2b72c865fa70525f2cea33a312c45f2eb6e09418c30c491616773cedd8ce2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUG12205492.