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 0x03dbf4439403ba71aa8e6e33c35925403624518850f772780340fa3bc8fd1c19. 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/808d8538-e10a-4ddd-9b8d-d123cb1292b4.json and https://artists.proofprofile.net/proofs/artist/808d8538-e10a-4ddd-9b8d-d123cb1292b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ultimate Jazz Collections-Gerry Mulligan Quartet-Vol. 53
Modern Jazz- The World's Greatest Jazz Collection, Vol. 23
Modern Jazz- The World's Greatest Jazz Collection, Vol. 22
The Tentet 1953 / The Collaborations 1957
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 0x0cf9123bcea4bf0dd9ee7e7685561456295c0ecde6d146d3a9fcfb41a4b77868. 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/USA371352690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b8c0796803a904cfa67032409dcc7ebf0e0266843f5169b4de1ffb492e2758. 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/USA371352691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a37c7803152c6ec02c075d81053c7bc3a1d272d9bec3a7791a984eada850ce8. 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/USA371352692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2994b45074f1753c75edd78acb8710b920bd8d81af8799cc5f01a4728819bc37. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USA371352693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2449dacbab97efd9aa3eb9052c0a5b634e676e0331b7de28233c2be35efbf86. 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/USA371352694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc598d6c859226562600f473c9a3e1fa498592dedde34ae837549b2189e6e3c19. 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/USA371352695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6b04eb164c72d35509fc527bafb0298cfa49f788b90f4ddefc05d8396150a9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA371352696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef46a4554cf6136a57d00439e468c4c1a42a5c0c30c6936ad8ee2aff88f975c5. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USA371352697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6317eb544c095924a46a5cbe7d9b444d7d66ebc59282392e72c36bc522b6a4c0. 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/USA371352698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcefc3e06d21eeb819885f8f8515a1e3bf6448343059e191c33f79a0259c7178. 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/USA371352699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0540c69371d5c6f2471c3ee546a649023a1ba8d53dfe0de1f999af2cc769500f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USA371352700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c43b2743c49d780e2a918e4c5b650608adf14f1766c38c4e37b2af54aa82573. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA371352701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e072a7813b7c79481ce7c3619fad4a7ea67e916f5321f59e693c267cb96c98. 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/USA371352702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa795400b80ca98fdf57286c762505f38d1fe36dc4463d0e98139931a726704be. 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/USA371352703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d1ace78c5014980205e8700a0d06c020c35e7aa9de68ed62b2f13d2de2e600. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USA371352704.
It Don´t Mean a Thing If ain´t Got That Swing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084321b7747af791fe1cf6a33b5d7328321057376b29144ca1eab6755cd55483. 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/USA371352705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b0fbe76824e6f3ee6bfac12beda24f0f3349b239335bb169f1e56c1da1179e. 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/USA371352706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef1585bad013a84d23cb796f167bb22f1a7b44bf94704e3b0b86316de37c4e1. 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/USA371352707.