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 0x3992c92c6fb262aad4a69f5a74aaa77ba1cc3bb94701780197cb2c7d7be6f001. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/753855b0-6a87-4748-9bcb-ce49289c5b21.json and https://artists.proofprofile.net/proofs/artist/753855b0-6a87-4748-9bcb-ce49289c5b21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
エレジー～ビル・エヴァンスに捧ぐ
Live at Birdland New York (with Randy Brecker, George Mraz & Billy Hart)
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 0x4e741f064422f22a56994d8a669ad31ac7efdc746d6c1a9efb1c1abf7fa60f97. 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/DEF301600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb7e924dcaa7bdf28d0337d8e329a3b739cba57481d8001011a31c2a682e387. 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/DEF301600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe84a043738c87fd6f4d4c52e8f411c8241bd2f056076334aebfe50c619bbcb7. 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/DEF301600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c7e7c1f20c25b1e6cee08f912cbd73a23c4bfb4eb32d8b6078d73594f09531. 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/DEF301600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81895ab54a266cf78440743fa642b597467daa618b27836ed97ac4c15adfbdda. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEF301600004.
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 0x844a21637525657bbf275fea2fcba3a3243a489bfec9fc89cb7971a7fd10925c. 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/DER411700157.
Impressions of Tokyo: Ancient City of the Future
Dave Liebman & Richie Beirach: Quest Live 1988 + 1991
Dave Liebman & Richie Beirach: Duo Live 1976 + 1990
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23b93b5a0ea5bab2fcbc072a36ff9fa1eb96013651d0045ec9758a2f4bc8269. 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/JPI291065511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18926009ae47bcdd2ce78ec669d6cb7176d74fc2ca2d2af9f5ba6aacbbdc03d. 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/DEA890000010.
Elm - Live At Maybeck Recital Hall, Berkeley, CA / January 5, 1992
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fe7b53cd1b6c940bb952948c8121d5c9cb6791f16483860c6c66c46ead2297. 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/USC4R0509617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb79467ba6beacacaf156ad0bf78ec90084acb70d12059afecc1abb0517ac00f. 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/DKEFA0901901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74288134b55e9d698caea69e5e9050f96f705cd47fc9c921f748d025b34d389f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DEB337914201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872ad2a720766c5de8bc254d291c009b4ff4075b80411fa62d52cb0818866aa7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB337914205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f95ebadcb2d3439eab915b4cbbef020d2456f4a77ea73f2f17686a469d925cc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEB337914202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b23d06c2b9b52ccac3a5a768173158c0bf851d5ff39a642d06b8f02526c3cb1. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEB337914203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1c8b71973e9bc9aee54f05583324f6318a902fa81c7c0d9173ac6574f92308. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEB337914204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1e992a3c9c87d3fc39776102b14e37958557627254eaec889626523196797d. 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/DEB337710401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7baa30c4a288a4f9510be33d1bcffe0f7969214263cf7eed962c946a3f44aa3. 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/DEB337710402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84516e49a6f391a4d189c2b9977040e76aff25e2d49e96f0121e9973b66885df. 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/DEB337710409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ce4bc97dd510c1379691ee3eba9e0ff8dc22f4b5e7b87e1f6973e97cbe8956. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEB337710403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86143efc2a66e043a710dd207c2fba876f77386d1b53234a1ba3e7d704069f52. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEB337710404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963cc8452095a205ea156ded2d03ff2d4e04014b8f65c3833eb8a261a3d3df6d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEB337710405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ec37300959efca5584f828000671c265e5db111f5384f247a6c5d0ffb4f190. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEB337710406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ce750d4a5bda464665238d095d40e7ef960f83e08491049365aa177904c4ee. 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/DEB337710407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8845a44e031ef843b996602372768baaed7fba5ccf2f377be33e891f904f434c. 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/DEB337710408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0a1e83e27f1361dc5aeb4363f6d38d4ec34f8b689555d240f4fc2f60b168a8. 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/JPI291171205.