Derek Austin (11 August 1921 – 22 May 2001) was a British librarian and author. Career From 1963 to 1967, he was a Subject Editor at the British National Bibliography. He was also a developer of in
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 0xa4763d4fae0146d883cd52a019362b8329bfc8165cc42692fc19a376498d12ec. 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/e807771d-7166-40af-bda4-0ed122afa86c.json and https://artists.proofprofile.net/proofs/artist/e807771d-7166-40af-bda4-0ed122afa86c.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 0xacceff385e398b38dcdfbe7134ad2f8408b623bb9edb00a1e096ea32b32a00cf. 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/QZFYY2237507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf521045c3ca7dd874866aa3020c1905ad1a8fefddad3ebdbb2ae5dce5a51210b. 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/QZNWQ2199683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2454d647b857e2b9658fce356210ba955b771915760fc3d8665b376bede889b5. 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/TCAIS2401556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb688ba346c51d149b3a77726d6365b6dcc90997ab4265ed4fbd8d12a7a545048. 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/TCAHK2362275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70bc965247eba80aabc9e2cf45a9abdef95003cfedacb50d84966359e11b018. 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/TCAGX2367069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc846545ede5321853fff7e3a2a0701bc8607beeae76a310afab128fb9db0e18c. 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/TCAGS2363114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3bd793bf647dc2f6bc6e54921fe59bfa723a99029f14f6a3a3bf6272f5f408. 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/TCAGL2210485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dddf1ac71ad3bf33544d383bea180b53fe7e3ea27e4af286ce86e9b47cdfa45. 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/TCAGJ2241592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52d6fb263f44b48c934504c638d75e9457788961124509b38feb05ca2402548. 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/TCAGH2232506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f99769fd033d1f2e6b51d47e69327f00bc47687cf5b6a534a2d72c9f1c8fcb. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAGE2205878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394bc77a3c46374558cc167ac7eb6ccb5f915af9b716169345f01cbc820f6d7f. 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/QZES52203683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a158efc0aa4e3b7c3da8165092173fbbeb53a83f59581d2327c2c4189d68b6. 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/QZK6G2159757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc88b4364fab33e3fd500cf7eff387b7e36c4f752128d479dcd7702e9352d56e. 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/QZK6M2175900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dff315ebc1742e5611e9f16be54378631753a9706f9fa3a3a9e2ff883d1fba. 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/QZHN82159194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a94a023e047bc77c807ac1b53d97796659a44719490c29854c3aaf52bbf429c. 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/QZMEM2057714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9484af87d787df0a8a57bb36c161c31ed9ec2825f5a4f71611df4a349343f1f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZHN82159195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006a6dbfcdaf7ff380dcfb039b05360aad38e07b7c50042c72ac115139111ae3. 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/QZES92184368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4086c166dc41574f0b50f3530030e730d3c0bb069513afa8a501352a512f5b9. 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/QZFYX2114037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc653f09f51685cd8c0a5416ef163c507bc48b1e2028180a5a61b20277edca2ae. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKPL1804783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809b8486b6543b186cce0f50eb3eac9782fccb05d97c002d05b870b3e4083f66. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBKPL1804784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ba32f2d04bab859914667457417b5f488720bf7cd9cd7d594644d922cf80e4. 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/GBKPL1804786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff03005378e8c9fb0f72a869319ee541fc0dc0a8b10f59437533daec9b5ac9d0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBKPL1804787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031b2c1846c46af2a23b09514698448d4052695e59aabceade12c3776717b10b. 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/GBKPL1804785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc32d681724cd7d11db4cd6ebb6cec8db880bd8cb7478220fa771b55501492b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBKPL1804788.