thumb|right|260px|Aarhus, Denmark, 2026 Josh Nelson is an American jazz pianist and composer. Nelson produced his independent debut album First Stories at age 19. His second album, Anticipation, was
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 0xabe85abba7db6845ec4cf74eb1bc98c77474463aaf3af153a14584d3db91b12e. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6993603f-1b2c-4a7f-b04b-22c01f949a51.json and https://artists.proofprofile.net/proofs/artist/6993603f-1b2c-4a7f-b04b-22c01f949a51.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Reckless Challenge -Conversation with 2 Pianos-
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 0xd31c5c3377012a6d7b85adc75c8be79e7b13501b3d46910b66c9ed140e08e6a4. 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/US3M81503373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ce153fe4beec0dd43b1a5ca06e32fe1290df738fc741020e31b94960f091ea. 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/US3M81503376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72747e8dda304aef1293eea2a90c7ae7d4a499be2155fc9f35e5d4aaedd91679. 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/US3M81503382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d130ef2eabc26020aa6b2210c1dfb095e0edf76384f7e69c25f7a44159a479. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMEQ2035589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d9bb9b882b0d1e0297619d6623f04eb61ac4b0ac2a9019378388603c6f5f8c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USHM20981530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6921ca19c09ba8560a2be6f62a224ff51aff1bbf2aada69a9f2b883c77ed84. 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/USHM20981534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146c26a3a715a2671267de6a5308d625199cbef426d78adada9f8b39acdec12f. 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/QMFME2487163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195d7ec8b2cc91d6ac332236e55664ae08b2fb86ca775e31975aadf601b27439. 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/QMFME2487164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb887fd313fe56e08e90d1979c1301fcb111b3f4b0b00f74619357af8724c42. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMFME2487159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fcc865bdd88ee6d02dcb28fed01340780366d1df14a92650de1599c51656d7. 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/QZHN52451846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfaa822064a117c216b5dd9c3d9d09c0657c42aafe6aa30097d9f6eddd1e37c. 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/US3M82406667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058275bfafbcbc50e0d43e7f320c175a85114467fa9448f25e5123178de33a7a. 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/US3M82406668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848e559efb55da7fc6f27ef81e7f418fa8d87420b3833663fe1579bcd201a8c3. 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/US3M82406669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20816939aea4e3f1425d3dc96b8b97cee98f1b67fd1163d54d8be0ce8568b8e0. 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/US3M82406670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56211d5721757ef48752d2b07fd7e55675dbb4fb81664cb8c853a6e15869c6fc. 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/US3M82406671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb45699215d391a9545022b2331b99c9ce1b60fd27c22b3a835d74b3aa17b46. 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/US3M82406672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5275d296a86db9e76894cfe288b17d0e20a42da3b8fdd1de59deed4930d3b3bb. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/US3M82406673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1828aba1eea926d32481d805e2f3dee53cbcc112b6ee988c66618f64ae147b1. 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/US3M82406674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984dc1d85950e2bc37cda6a2f0c2a485407e21e87678efb192b19412e213eafc. 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/US3M82406675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a18ceeb4360369f00226105b03ff2e04bdebede51f61e7b3b9bed07f6baecc. 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/US3M82406676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeba0dd8fdf51807207493935e0069c44c682c71b3c952ab463496b684b2ddff. 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/QMAAK2400774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78783c6bddf21649230084fb39034183aef3573a69224233602b786d74987dd. 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/QMEU32012242.
Last Night I Dreamed (That You Changed Your Mind)