Rachel K Collier is a Welsh electronic music producer and performer from Swansea, Wales. She studied Creative Music Technology (BMus) for four years at the Royal Welsh College of Music & Drama before
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 0x1a83bd035b72e1ad4971a8538cd062e4790810482cb60ec5e1838c9cf2b52b1c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d666636-041a-42bb-bfe9-25e6e2431378.json and https://artists.proofprofile.net/proofs/artist/5d666636-041a-42bb-bfe9-25e6e2431378.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 0xf26f812102f8ea3c74e79d5ebff9853c80bc5bb7a3e9948b55fa050c732c63e1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBDVG1289103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55452012dc97e32c0ba1eb541b4a09cc7fb9c414f3e784a10e6c6c3298a136a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBJAJ1500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65936f04d6419670ccbe36e31eea6fb2738d0951b56e722eca3d5db677e073a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBJAJ1500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdc780418e18d30cce08e3285d151c547a1d179137b0a96da417812b413eb27. 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/GBJAJ1500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d618f6c24c63fa7a43eefecceccc1e57c9ec149c0438eb7f6742b17d10b839. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBKPL1674062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0895fde93e48bc4ebf9bc9fe73ae5f86113ddb9f8f51a25f629b1b387d2ecbf8. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GBKPL1777116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e532c5b25610ff218bf91635551dd6e66749fb36c8c036a1f9b385174ee71fa. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UKXN22221963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dc31533ea5c7d3a5ff5f4571c80e4ecfb144bf725a833fc006adbd3b65e84c. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/UKXN22274054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce47b707e94e9507a4f051cc9c53b3e732918ff733d1b5543128bbb21a1252d2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBLFP2116195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2785c81597b439e95dfb58bbbfaa4a4b93a647bfc7acabf797efdceac27cdec. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZS7J2333239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e532c5b25610ff218bf91635551dd6e66749fb36c8c036a1f9b385174ee71fa. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:21:22Z), 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/UKXN22221963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c206353191a686bdbe90c870bc2ca18957de6e90cd7faa941b2e3d32afa7dc. 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/QZQAY2420420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c206353191a686bdbe90c870bc2ca18957de6e90cd7faa941b2e3d32afa7dc. 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/QZQAY2420420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34cf9fedf912ac8dc0038c7fc47ff171176f5e65fdabc0bfd42979087eccde7. 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/QZQAY2465835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8798689ceda51d6cef4a570c5e4a76286c608b56263afa8987826ae704da5e. 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/QZS7J2448848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca60da75cc56183c709ec1edd66afbf452310af760ef75897480de8b42595df3. 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/QZLBC2100467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db7df4c4b67ca3fd7d8b63d2c39e80a989cd97e414af7a42a62e0a865817cdf. 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/QZQAY2355193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a27f75bebe4dc1b44a736dc93d44f3b3e6f9d5991a60f213edf6930916de52. 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/GBJAJ1600436.
Anjunabeats presents Summer House 01 (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c4cc124e849f35981cf0774fcbfdce7a80ff8e0f7d76caeb98f9b988d1c9a8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBEWA2403902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5059438c867847f48c17648bf5af2bbd4ef5138f8c12724961d49d70597513f9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBEWA1701652.