Jonathan Estabrooks (born 1983) is a Grammy Award nominated Canadian record producer, filmmaker, trained operatic baritone, and graduate of the Juilliard School. In November 2025, Estabrooks received
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 0x9fe341bf0700a8d367a0a45497d2c8a3c9a5effdc9fae6f16ebe487cf97e5918. 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/8304cd47-5eb8-45c7-ab2c-0f8fd436b1cb.json and https://artists.proofprofile.net/proofs/artist/8304cd47-5eb8-45c7-ab2c-0f8fd436b1cb.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 0x207bde0acfb5b9c1a2ea1c605069c936379eb99e68156fff71dd110a8f6829e3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH1466311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95db263738c8a69cf4a7cadd8ac0f78f0ec409d06c5c1bcfaaba2820a43de92c. 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/USCGH1466312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697f5d53c36a082f1fc23e99c2021de979587345db95001aca59c3976d90e822. 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/USCGH1466313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b2d2745a35fc599443a29045ae89ce6795a472225fe6468574f74a0dfba0d9. 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/USCGH1466314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fc94f98ae3c72518674b95780d7439a8e5a9d7e3bfe1c33b21a017925c2c9d. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USCGH1466315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8ef77934a39e46e203a690775c11f4629945fe390ccd9e339fce90a65153a4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH1466316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e2b90421ba7dd50e520e9e564c1326901d664cc6389097677ed2d99b75b4fa. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USCGH1466317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3f084f4fad44cd919507de41676188add5bcac53acef89e2b7dd024d3b4ac5. 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/USCGH1466318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fc5dee0661de5e8bab2493e556ddf6d475b9443e52f97c4e4a8931b9f3cd88. 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/USCGH1466319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3562825697f0949562552bb1ba9c4da136def976cf0eea8e02d08b2275b9a145. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USCGH1466320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c4ea079e359e5241597d73f35d38ecc12368766b02c13ed6780f7426db2c9b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USLZJ2320556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edc7b5459dd92e0044096b23f51bb8338e7f21e6417f6c872f4fc41ab2ea89d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AU3SE2100424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8da76f61aeafbc7ba2506810fc203d32ec0a2192be3aa3cf8fa1e47c7b76c0. 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/AU3SE2100426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50dc8642ad5bb069c5a5126cc81bf0235c9a444f1c865591487df7eee38c660. 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/QZGWX2209822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648b09cb2827567830ec41cff1f23d80574972d8cc2f7a94994ba1e4824a630e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZGWX2214302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf297914304a40039acd0e63172e0d073259ffa2695cc150a32190eb42966ba. 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/QZGWX2150751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68841422b13913b1976dc5b72239fe46bfb956ece1e6f10e9513aeafde95526. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZGWX2150676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a14b6a53c003c91bb070b2e47906d0a4fd0c5baa7b8ccc96fc443d404b5298c. 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/QZ22B1925639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915ffa17a63e9751c6c4d8b094481ee69cf619480503eca7e25e558e7c2b26d1. 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/QZ22B1925477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0671129a906dc56958b3ec4755a6afcd6dea268d30c36d8ef09ec168f77dcbb8. 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/QZ22B1861706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5252cb22cf226dffef1c012789ea003b2db7f510253e16e66ec6d74405409d. 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/QZ22B1858058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a8825b8574a6c03433921a0bb9de2a90e12468e95733be7342428d133ae1de. 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/QZ22B1856392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3157837296008e22a6e1c40314d5dc82b1f45988d904811282602e2f2ea1aadd. 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/USE831538710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0943bf28abbfe478d5d0081a24926aab636df23136d37128de93bdadc479aaa7. 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/USE831534719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd161f3b9cfa3cec617a19db580915e549ff6b534ae9628b1163abf6f1598ed. 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/QZANL1769038.
Anna Christie (World Premiere Recording)