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 0x88c074c5918f13951bb1f6095f043386775c9f428edfb46102e2a5f9cae59ce9. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0e0c246-c6fb-439f-b5d7-6d59d575abda.json and https://artists.proofprofile.net/proofs/artist/c0e0c246-c6fb-439f-b5d7-6d59d575abda.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 0x59150b81cfbfe303e95176058803e306aaff07fd00c51412c24cbee246c6bb7d. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEH742327938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cbd3d93bd10fc9b934669a548f01dd58cb4d630121ae43e8f23a1ad0d75530. 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/DEH742210966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1b267baff1dd9419328195ac7b7a8a7d73b837e5bad29c7e33eb6f06882596. 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/DEH742210967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ed4dec01ce454a951c515abfba91b9c274d463ad32aac9a94b26f7f7e3fe74. 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/DEH742210971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb634beb75ecd4c70a65e0092fb8da21fd14d472bcd3104ad109f62e06abe88f. 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/DEH742210975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5b466d7aa99ca450bd569771ab3560cbfb838c9ac593735eae729aa1ecefc3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEH742210981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1c37e8dc36eaba91344d5edebcb0cb3ed45fecaf40ee4c3c11a1b41ff0ad35. 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/NLCK42416409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec1d24c11ddd4f14ba14fe6f5a87aa9e1914048ac05e79d5b57698414c8eb54. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/NLCK42416410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6c302185ec353bdae5c5b897365ca1cd8263eb084269cb9e1e06d8500dbb32. 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/NLCK42416411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12343681a56895b9c489ef26bc5f1d66bcb15b5505564bdb6abe09f8227bf51f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLCK42402209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25eb4e6d3a59e012746fac06222cbf6a76250e49736ac32d7ebcea07bf18c016. 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/DEH742179585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a84592d7f30b59d46ade3f84fc4d53bdc220095974e208a672102fe3b81522. 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/DEH742179586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96466958c0855ed69cc777debb15041bc19cfa71e6e4b933372376329d2218a9. 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/DEH742179588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a238ad41e4e27e2986a1812086435dc5ae61e3bd0d63fe805724e04420de81. 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/GBKQU2142791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dff999dfc5352849414aad940165ab95dd374361c887cbf7d9b7921cc6c318. 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/QZMHK2564317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32125571dafd27c7563079c288a298eb89553c748712ae4121467788db4df7c. 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/QZMHL2519526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca5edb0300699d37879e7b9eaaa4384e8e8fbae9f9bb8afca377636fc452ab9. 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/QZS632550022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7319efbe97808af096a910112346bc7dca15c369a0ab9585f43225dca7b4fa58. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZMHP2570505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c88f42fee7ccab97851b8e1258910eee05263e112b609b4d098b6cfd19743d. 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/QZMHL2565753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2399f3d523b269c2b099ae6b28ee1a937e80daf3d7c2c04fea137a0f0f8c83f4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM42K2505601.
Technical Landscapes - Melodic Techno, Vol. 12