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 0x5877d9e5b16537261191be4b407d950b4f1a6a6e211be0f6f20a47657f0d243b. 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/a6c597ae-d010-4db5-8276-1e1092f101ff.json and https://artists.proofprofile.net/proofs/artist/a6c597ae-d010-4db5-8276-1e1092f101ff.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 0x212afc75f1f802b7f2d068d2570758d7a21f578007d36f552dba18581b198bfe. 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/DESY21400845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b9b618fe4db4f2bd1dc5ff7a36f34c947eb26f4bf0c90893eee15e7002d3f4. 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/DESY21400846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba063a865751afe8ae7e7f0708ae3632bc463751caa74befeb04cd00edf542f. 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/DESY21400847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa650e8f5ef041fa9d55668756afb6cfc65677888aa5313a1acde9e513fda59c9. 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/DESY21400848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7db854179ef436d47968d8409f49f90981b4b16048d18858ad7a9df712603be. 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/DESY21400849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50300e4c5d2edeee642903c7ab1def5bafe80e3bda2060cd88d7495c6c4247d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DESY21400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6326553eaf207941e28385d56b4f3c6c58705fc1d52ae7e772c908b05ef625be. 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/DESY21400851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239de14e54b0e568f0cf7c6b87d97c617a6a051e76092a9b95c33cbf1669fb0e. 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/DESY21400852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4374a5d761ccc1dd23c9f3c713b265a75661dfb9ed62b052681fc95c34e3356. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DESY21400853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0679da0d77d15b257f125fffbc4917c61d82871a1352281a7bc7c8f8e7664756. 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/DESY21400854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9620e4c2bc63025298f2e82fa36f54d957f3662ef62cc75124d3a67a77c9de. 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/DESY21400855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a488fecbfcbc55146ee1cace406bc44ef58f7070cd57f099c2001da8d6f7e8d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DESY21400358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace00606afc094db58e3fa4b8530fc3fa758028431f05b817dd9903524b05175. 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/DESY21400359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcee440fe995fda687c9860cc0d29c34905d7ee0cc434b384d8807936f9edc2. 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/DESY21400360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cde7ea2663f2e7adcfef93d1f76d115b5b9085ad6fb941cc80cf9763fb704a. 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/DESY21400361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce28313d842123815665f08ed280c86945b526c04a10a4b4a56fa9ba508df3a0. 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/DESY21400362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72cbfc77def090142bf2f3bca0843c065e8c4efa9ae49a2d89bde27280f8d66. 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/DESY21400363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3afc1a85aa1c292075de34e0d41a8a34936887c23d501244040a0d10be54f4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DESY21400364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ea9479020b8c9fb2236d6b1e0cacbdf71c5cb18a984a440ffeaa2327c6bc2a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DESY21400365.
The Vault: The Best of the Jazz Jousters
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3220a450459c9764756fa46aa102fbfe57075863668d5065eb723fbd8258ab1. 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/USHM21551569.