Codona was a free jazz and world fusion group which released three self-titled albums on the ECM label in 1979, 1981 and 1983. The trio consisted of multi-instrumentalists Don Cherry, Collin Walcott,
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 0xbe80694903693d62d24adf1c55576e442c079bc3321712c9fa150964a55ef075. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a530ac3-c1be-4087-ab3b-fb9ff9d8de98.json and https://artists.proofprofile.net/proofs/artist/9a530ac3-c1be-4087-ab3b-fb9ff9d8de98.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 0x81bf551f9bc3e5e59cbae14bc8f98875f2fd15c53701c663af89c6112f9942d3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DEB337813201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57890500b20254c9516c9988980be75c56edd559207161b2693e819fd59857e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEB337813202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1361fba01aa187760bff238b66afec824690cad70455a4995c5f3882629e1dc0. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/DEB337813204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bf551f9bc3e5e59cbae14bc8f98875f2fd15c53701c663af89c6112f9942d3. 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/DEB337813201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57890500b20254c9516c9988980be75c56edd559207161b2693e819fd59857e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEB337813202.
Colemanwonder: Race Face / Sortie / Sir Duke
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3481cbdef5901d53b84a9a1be7049568e4819e2169fc2577262ab6ddbe77d1c6. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEB337813203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1361fba01aa187760bff238b66afec824690cad70455a4995c5f3882629e1dc0. 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/DEB337813204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f05f79999823aaa70e19ab1e2ad82b51038157ecd04b1292850d34aadf1a4f7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEB337813205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7667954fa622d9ca54097f4d036f3b89ffa4db3dfbd0bc16a6fbc3845e596d. 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/DEB338017701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38b737743177bc64ffc0a9adb2e7c194d93f7e0c2221f03056fb339c2a7c03a. 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/DEB338017702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e034b5e1af5f98c92ba25f4fdfb1a3c45a9634a74ee0274840755ccfbace9d8. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/DEB338017703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bbcb7fca1c3e08761392f1e1b79594d8ea3add81e6f45c0585380a2f6e153e. 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/DEB338017704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aed3a5f7bc12c9baef9f0159ef41b3ea046d04355290ce4679b521dc5c9b8fa. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DEB338017705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a9caabcf68d2cf55fd2ac52247cd9b1f7e8042b2055e0379e428ba50459183. 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/DEB338017706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576b1786e51f568a350fe3be3df18f67ca2a22d025395e5fe2add4a418122d0c. 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/DEB338224301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c87963da107bdda1477173e60bf3893f3cb84b82b0df27939b97347207ed94d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEB338224302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41742c08bd9c17a142714ea88100556192c9390c8bd7d6461dbc603407f53531. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEB338224303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7be45c013e8deaee51a014850d978085c9af69d565cb798c2aadac9d8df56ab. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEB338224304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ebd3a9fb6741bfadf1c50f33b268a8e9c79fc4779b930642065a88b198ccdc. 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/DEB338224305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75e37c0e7eec9ec3a8e2dfd611ad7f69adcb76ace8ba3a23d6349252f7f1b7b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEB338224306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05080664f6971a9341840e539f4decebb24fb3437844ef2a4d79305e6676cd6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEB338224307.