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 0xb476952b6ed5cc19fb35a8d354637be152b85cc0a17340e989be69d375c45b3a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f747b27-abf5-481a-9aee-c5c52ce250c7.json and https://artists.proofprofile.net/proofs/artist/7f747b27-abf5-481a-9aee-c5c52ce250c7.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 0x444a2c638a68963dd9f8d0346f6c8d2bd1b7a95c942b8edf9cb84dc1d724c7f9. 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/USKO10405378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c6b1f061ac3bc54a69431b1b03e6abbefc6a544e6ebefba0183d6d61dd4f41. 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/USKO10405382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8142e8c412860cd86201677fcb943ffb68937e152231ae031f97c0ef76cd17f. 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/USKO10405383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cadc2cf7c055e8ea5928eaac46d7a8ad9c23e6bfadd43722ba3e79a37d9daa3. 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/USKO10405384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7faf58446de48d53735d1ddf0bd995d5e4edd8c6f1e801aa3f020f8743bb48c. 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/USKO10405379.
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 0xd7b532c31611f4d4d529762d438af042942bcf82a6ef3f1fcb68399b158fd2c0. 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/USKO10405380.
Gerry Mulligan and His Ten-Tette (Mono Version)
My Funny Valentine / I'm Gonna Go Fishin' (Mono Version)
All that Jazz, Vol. 131: The Ballad and the Beat (2020 Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065ecfd45a89dc24fcc17742df320621b8cdadbd66020f8557f2e740255bf9e9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USSM15700470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d742a99e259fa7fd88c653e4d29a45069512c2f3e2f8e892d7b8f1225111157. 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/USSM15700472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d35440342b9277a13b787a9eb26b6bbd009e69830a97e389fab34dfb1d9d428. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:12:27Z), 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/USSM15700468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e47cc49b4cb6befc122b03be74b90e065a650b62c27347c3f925555719ac5e. 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/USSM15700469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd778a8050034064ceb236a7c662450f6d463869e688d675c25ded5424f73c6d6. 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/USSM14700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a7e0f4b528f829d738f9b03490d36d2272e812305f9f8df33c60594a1de7be. 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/USSM14600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08053e33dfa09d29cd3e5ce32440f6da8d9cd82f3a18906dc48980589d253c62. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USSM15700467.