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 0xbc48aefad6e9dd65ac4cfa5fdbad2235febae33ae390356cdfcc1388b29b21d4. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1288d7ae-33a3-465f-95c8-99b7a996a69d.json and https://artists.proofprofile.net/proofs/artist/1288d7ae-33a3-465f-95c8-99b7a996a69d.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 0xde507d11f67eedf7384a614a8ed85ee5e6e8817bf2d3e6161f6ffe90fa24a4d0. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DES202146301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bea983d3654f95cc7f781c53208a7449a7d3561c0f5b02ebfc323e5980603ce. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DES202146302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a53616d25ad306b096f4cf5d423b59d2f05d7c58757def260b798e559efaab. 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/DES202146312.
Eddie Higgins / Benny Green: The Singin'est
Relief - a Benefit for the Jazz Foundation of America's Musicians' Emergency Fund
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3963df999094dd94568cb78ca86283fefc79c89d52f426e70ac796462a2ab15e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USTE12100447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e8407af269fb2db9cc3955f83af9b3436ce3a287ca947dab07c6613684227f. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/US2W61540303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7183809ec88ccefc6632f0eed157a159aaa956ef05acf3fa53a60766c7a8f83. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US2W61540309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dd4aa822df350beabd5eb08d95939c910ec1f8c301b9b2d0ba92c755f48f1d. 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/QM4TX1501265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf73316cab5e3717c7d8823441088316de82de3f7f57c65fa153dae05726a4d6. 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/QM4TX1501266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f17e725e112f250109187e84a6fe688d79075e0731292d2efd569d13bdc3723. 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/ES7710869601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f3817dca2940086c3ac24edd47f561b0a3671381e668e1fc8ef3eaae7801e6. 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/NLHR52066917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a856223af493a1779c12666569e990aa379aaf4535aeacad3dc3de891ba2d14. 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/QMCAL2100011.
Portico Sessions: Jazz (Harlem Nocturne), Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd0e81d5ecf8080765ed3e471197f8aeb28cc0bf32c54a4666d0292d6754e7a. 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/USA371513161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a04b4cb2234c5003012c4b4190d830e323ee3a9245db941a4700237720bc4b. 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/USCXG2200641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2757584e13008a8250c090977243969e4f650a603670a1202f88b8708a435d3c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USCXG2200644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf399341150990b1d93bd6d8a4153fe553e8a844f6283c859acc45c47b28a8c97. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLHR52068601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce1a692918dd0f66c8750b22008ca8eabd93b79865c70f8676eee9bc9ed7012. 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/NLHR52068599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349d9567a46ca617bb3514ab647f5b107c7effad5ed9d967af5f5709bab4be66. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLHR52068603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fc2eaba4780eb41948f5d1e22a9b1ce30db6cbe11cb14af944d232b8e55c4d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/US3L61457163.
Mal Waldron. The Complete Trio Recordings 1958-1960. Mal/4 – Trio / Impressions / Left Alone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edc269c7db773138dccc9c78037aa9176f3d114df5c571973137036a9850b54. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USTC30778975.
Meritage Best of Jazz: Straight No Chaser, Vol. 16
Meritage Jazz: Somewhere Over The Rainbow, Vol.1