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 0x0988fbd780a52b718715042e9f5921ab3e1299daa049060f784146ed55f50d76. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ca5a68c-7440-4da7-bb9a-fe64364fe255.json and https://artists.proofprofile.net/proofs/artist/2ca5a68c-7440-4da7-bb9a-fe64364fe255.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 0x89128d176cb8a1fa293a83209ab233c6f04658d2639e7015b0651081cf0961f3. 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/GBLGL1112334.
Rex Stewart - Duke Ellington's Small Groups (1936-1941)
Rex Stewart And His 52nd Street Stompers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c409b9e3ba9104c48beba98e787885cc14b17e45511789d519ee3308533f426. 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/ITD541800943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebe33ee035ede461bd0a299f3e09855b088c14fe2b80942ef1c0a6d2d6f7866. 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/ITD541800946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc286ce3222a891a063ba5275b273dbd0cdfd8cd6fa3655b788c9f33b9c24ba3f. 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/USBB14000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cd7882fef887c0792d9446467e03393f68084587cf50f4a0c3987a76a52852. 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/USBB10100474.
That's The Blues, Old Man - Remastered - 1995
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f84a19fe39ff2cb53834ca7bbd106bc01b85e367212b7ec5d6bc02e0a42318. 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/USBB14000305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bb96c9a0b3c7949f769b94504104dc35f71dc6acafa4b49fa2d29ea5c0d7d7. 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/USBB10100475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4794c7cecf5580e86c79ae657c86c5859308670f5d8869300de8769fd4640e4c. 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/USBB10100476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1c60116251eb1d1424c94aeca77c1d78bf0df73a2c7d5ca40050a69fc1e1b8. 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/USBB10100477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71164e9f07611db5cb463df17244d718872d7ae8eae9d2432c4b07a81e1a2b32. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USBB10100479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06516215289cd01746f370319c3ab7dd23344c31a9c79a6b465e21d00bed8b48. 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/USBB10100480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e0ffe10a91c339047aec3eac5fd3200076f17952bd927c614844d5887f3ca7. 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/USBB10100481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62ad684014bb401448d25875c450b4716fb98479a4ae0ccc53355d13c1da959. 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/USBB10100482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff2194b8fb441ad336a8e1ceceee94c0d247c1f97d8dc6a5d46bf8310d3ab76. 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/USBB10100483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2017ebcd9ec00db7d83cb6ee77af418b8a4dc11fa912be0ecc5de356dbfc0033. 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/USBB10100484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7848c202e92964c16e1aaec975bfe26430f07ea81ff7b217ea45bef56a0c724f. 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/USBB10100485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e984a73ce9f2931ac761345fdec84d098bb97010ec2a01c9a38047bdafa7a47. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USBB10100486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80290024bc902a47c8af783fcdc33fe0d9b5b95415d69a2dc804b482319ad6bc. 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/USBB10100487.
Johnny Hodges / Rex Stewart / Barney Bigard
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb314ba710fd8f2f2f7e49fb24903f71226eee4e5b6c84f5d96c490b73c0d72bd. 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/USBB10100488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264057700aa4219cbe36559bc2031a37d45e99e432acd16da3326655266c2dee. 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/USBB14100314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542c0cd60123f89a58ad2b482dfcd9dbb93c4f47ce1d53897b50acf9a5178b24. 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/USBB10100489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7202f21af49a7a2c68f22fa9c4e71bc2bfc93c3311553eb4801ff62d8c5e3d. 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/USBB14100316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484481fce63e54ad625673ee14a64c606099a8dad481a16fae3fb9356d7d1db4. 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/USBB10100490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c5ebc898b5088fe64a3596bd473ac73518fe61376f197ea7d6b98918f83b9d. 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/USBB10100491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c997d47e5ce3defc9dccf999f4057a5c5e8f3472e9ebffc570a970c4c41373. 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/USBB10100492.
Saga Jazz: Cherokee! (Amerindian Motifs in Jazz and Swing)
Swing Time - The Encyclopedia of Jazz, Vol. 51
Rex Stewart & His Fifty-Second Street Stompers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e470da6c3a5cdc3c1f229d789482b4d7205c6a1a7247f83520e04de540d203. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEU240732738.
Swing Gold Collection (Rex Stewart 1936-40)