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 0x7d71ed9fdd472b1f19f6124080b5598f6babf093d470fe6445ace0bd0ec2c809. 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/8d865e3b-f12a-4fe2-8b77-5fa3346f9172.json and https://artists.proofprofile.net/proofs/artist/8d865e3b-f12a-4fe2-8b77-5fa3346f9172.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
French Café: A Parisian Gypsy Jazz Swing Experience
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 0xc53b76cbd885d01220d94c90b19d19905a4e957df41efd6e817c6be2f14a6811. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US4R31303760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fcce7a75a2611aa24d37f77e6712d76b6f820000dea5787da1f248ff510351. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US4R31303762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd61b6032586643f0b69220c0b2547129903caf424e3b25ee8f833786018a62. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US4R31303764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee737f976981dfbdabdb0150a1134d99e3c2eba8a889eb9432af107c167d19d6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3DF1527323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef64ef133243410a5f775e36c141858366300c125c1d1c91c59204906ad54441. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF1527324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8c9317b0f72f50ab9e3605840bdb99f64002d0e30a8a654771e37a08339565. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US3DF1527325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4809262e4357498f313871b06c8f32df3871cb5b9ef2125c866f9eecdde2e087. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US4R31303768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d7a50bcf5e42fdee45841acce3e347d153b60d9793e95022a1fc9c7951976f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US3DF1527326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7fbe00836f5ee925b307ca390d789f3436422791c3305c4f8bd96970be0a90. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US4R31303770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5256cddb6ba5102cb5dcded36f1b10e3d00ebefccd0c6f16e56f8226652df5d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US4R31303771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafaa7cc2e8fe0aff227bd5df53774f8d9314b7588b60284e6698f63b5ca6c25. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/US4R31303772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91784c50a9a7a817acb140afcf5f3fccb91d87009e298ae07d26ee423c7a2f01. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/US4R31303773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1057b4c15a511f3fa8a8abe7d51356e65ec9efc9bee50a367706614663737646. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US4R31303775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bf178b3e7c4750636375957afdbaac4e4bb986d3677e5324a160d8a547e75c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US4R31421753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2359c22e53d452b9b47725fdc9e429cb9e5250a153077ff25722efc8c9894172. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US4R31421759.
Paris Cafe French Hot Club Gypsy Jazz Guitar Favorites
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7da9bbbe524502a8ca309c4fa06f6474594a4af31296966b4c7fd93c3d30300. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/US4R31303761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ae87cbb6c0627759e4ee9121ac5e7bf5a839379d1fef8a139f94a88c1d32be. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QMUJA1405190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd241a4c82157dd3791a100974ad568af54ab03dede7f1894e5fce532e49e2d5a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMUJA1424893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53e343df42218fe96ba80750f86e88c05dd6f5236e14bc7f4b874cfead9a4c8. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QMUJA1424899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132b4ea824f27fab21fb160bc3eb436d73508161644d284984baf4a003f87ffa. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/US4R31303758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad47f6dc2188c46841dca389f7aff2ec0d6cbf07aff0316fea1922f6a0b8f64. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMUJA1435106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f388ad7f933b9765475c7ac1c204220cef753c7b2a1c784f9785cf2c63a6a7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMUJA1410106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2bd4a4ca20f3947943f74c007e6fff1ad50aee391f139a53109cc4f3798587. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMUJA1412236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5256cddb6ba5102cb5dcded36f1b10e3d00ebefccd0c6f16e56f8226652df5d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/US4R31303771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4162dd04efee8df4141ba4822024c2fed3502eb2a80eab39c8bb31d652c8679b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMUJA1424903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe633c8fe9edd3f8b6d5c813d7e68c221be49f7173cf92fc8b12d09244533641. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMUJA1438445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4a43ee02c0683520df2cd691e2bb34151cabf66ff9a0975c759451837900a3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QMUJA1408426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5d4629ff07ee1e0a4206bc3aa986c4df5b9ac97b6c18dad48584a0cb6ebbfc. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/US4R31303776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5202e952d348c62feaa09b2334d393a17233f8f33b813d1ff8564829e62b1332. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMUJA1424906.
Night Jazz In The Big Apple (Instrumental Harpa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968699e452c708107344f5b9c3738f819a918c74eadca658bc7d6ee65ae299ba. 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/GBLFP2437973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3696f2c82efb97899ebecb3a331e90d2d3047c71698c60ed1ed6ba90a66f2779. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBLFP2489685.