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 0x0988fbd780a52b718715042e9f5921ab3e1299daa049060f784146ed55f50d76. Chain 2 (Bitcoin): anchored in block 953985 (2026-06-16T18:03:53Z). 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).
Rex Stewart - Duke Ellington's Small Groups (1936-1941)
Rex Stewart And His 52nd Street Stompers
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 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bb96c9a0b3c7949f769b94504104dc35f71dc6acafa4b49fa2d29ea5c0d7d7. 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/USBB10100475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1c60116251eb1d1424c94aeca77c1d78bf0df73a2c7d5ca40050a69fc1e1b8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 0xb62ad684014bb401448d25875c450b4716fb98479a4ae0ccc53355d13c1da959. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/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 0x7848c202e92964c16e1aaec975bfe26430f07ea81ff7b217ea45bef56a0c724f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USBB10100485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264057700aa4219cbe36559bc2031a37d45e99e432acd16da3326655266c2dee. 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/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 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/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 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/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.
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.
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 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 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.
Saga Jazz: Cherokee! (Amerindian Motifs in Jazz and Swing)
Swing Time - The Encyclopedia of Jazz, Vol. 51
Swing Gold Collection (Rex Stewart 1936-40)