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 0x1bba1faa7390c95b7fc604349046039fb0d76409e2ff300fa360b58d84ac8c15. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d99082d3-94fd-47ad-ad21-177b0ac2cc3f.json and https://artists.proofprofile.net/proofs/artist/d99082d3-94fd-47ad-ad21-177b0ac2cc3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kul Med Trombon Del 2 / Kul Med Trumpet Del 2
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 0x3ef169911d1c55cbf36959b7ab552c040712dcd56df21736610ad1d9d35df3d1. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USCGJ2023774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e0087222dc8e5325755929db6f0072c97e941b7116d861707425c566964c59. 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/USCGJ2023778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d583e62a74b8e9c14ef82a593e944b4a1d36de76fdecc38cd0f71bfc1d8029. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USCGJ2023797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808fc51316de4a1c73a64e0755696203af2073bd4f870957a220ef020b32b021. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USCGJ2023802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6efd4f01cd4ca04221165689b2fb3ac57697210bfa4a5c63f8ecbd9de2d6db1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGJ2023807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d520fce5345407c8a1504147d4c1210bf0869fe18c5b4c2097511e32bd5997. 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/USCGJ2023813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619db2526da54e0799d8526d64b587ed70d05bedc301ad6b1b9834110ce56d6f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USCGJ2023815.
Kul Med Trombon Del 1 / Kul Med Trumpet Del 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935d168f5c30dea389d1c375c5246c019c3d2a65ef5095f92bb9c8e20bbb4346. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ1805821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82e273c6227962bcf482dd5ad1441281cab69cf16ed16f5b45b7035887f2b1f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USCGJ1805822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0711d0325a855f63fec2135d91f51ba92b3dee2c8f063e102c6cb09236688152. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USCGJ1805825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189494eeb5e84fd02621732bd7840f2c1d813e71968b6bcb9031fbab337d9651. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USCGJ1805826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea43b5793c46a7175c785236133ea69f6c73a8a58bcb136dc5ea94a7c72e44b3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USCGJ1805827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5067b8a68756b66af3c75d5ef3570b68a5c1161a8b8047334de43f5670520e64. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USCGJ1805834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9c03bfc9e84ef909877cc9286483c044c8e36e934c3dabf2c02ddfdc2482d5. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USCGJ1805840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645e38bca71451926e2a6583fce5855304b421cce2999f529477c6b666cf1ad6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USCGJ1805850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e6c3aaace275c24d6b02adf2f8cf35383001434c3ffe3a7328ee02be2da807. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGJ1805851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116615f3fee63666dab578e99417802940f700a00bf880fac132977c972c6809. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USCGJ1805858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22727ddc1b000ce635e1391d934a56533d18b3cd844fd796b7f37c256f25cbc. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USCGJ1805870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0856651a04150d13dc5e6c51ced32a2adae4bc004fd18223a173e3c047c5ea02. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USCGJ1805889.