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 0x758733f883cfabaf6689a7a48d7950f64427425ffd34b699cffdcc748dda3bac. 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/3e1c68ba-270d-46df-a1ea-cebaa4f87290.json and https://artists.proofprofile.net/proofs/artist/3e1c68ba-270d-46df-a1ea-cebaa4f87290.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 0xf9b57ef0a821b548457fb9a9252bcaad44b01793e9f3644200cd3d6bbd302732. 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/FRX762493286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb433c218aa781e0aff7df07c99ee2f41e925be9ecad3fd9787ff0ea3f25f27c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXHAC2300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4a8a91bac4f02c47db9817e3f8285232bda8e54785d9ccb7461f18a26011ec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXHAC2300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daca708dedc87a2bcfa7f21a2e03f35a3abf61322e44ff6ed089fdd941891c9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXHAC2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77134b2fedb0636a98ec2e7cf2ca493b9c964e978cbcb2d4437be77c327403e7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXHAC2300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4652d3b3b1944b7bd71bd2eca119a72d31777f53546c865b9c5b99844539830. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXHAC2300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a4c1c9545c7f4a7cc7d55601ded77ad31ef407116aa4ed7a9e9d0ff70b118f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXHAC2300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb15aa554a7ebc4f392494e6a98d9fa678b3eb36c7c7dd9a231e9ed96065d32. 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/BXHAC2300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac98d740078c79608f37445cc299d195dc15ed9a4a70102c80370a2c8b3cfb15. 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/BXHAC2300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb433c218aa781e0aff7df07c99ee2f41e925be9ecad3fd9787ff0ea3f25f27c. 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/BXHAC2300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c300fd59e62ecb99ad3517211fb4eb6d5ca0afe58348d76a962ba4985da3274. 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/BXHAC2300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad2091f1335013afbfb0ae903b3031537cb3b9951d6a0009b8aa36fc812b74c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXHAC2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0def9092eb162d3fd6853f5e20f2a35fb769221a33e989509629dc9d1272fa92. 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/BXHAC2100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc5fa5ba76c62c63f93db71bbf9c101766c5a7d3a85cae52dc65a722064b9cd. 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/BXHAC2100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d82e22f44c897b63e5c7e2474d2183c3b43f7053d18691b09c5fc5073cb45e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXHAC2100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66cc179f0895b3977219eede5e159e30b51d37f4b54a89bcb85d8c1c3a680c. 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/BXHAC2100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65919c5faa2289f9189fafdb77e58a16cfcccb3c1b7eb8df873661c3c42da2b7. 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/BXHAC2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a28fd2fe560e31293c4cc1122523097ef0a943d2331f12419c82f80d8c1b19. 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/BXHAC2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25390ab542d2f46a7df441397dede58a575cc9cf5bfd3d933f8a225d301618ac. 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/BXHAC2100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402b33e550b5d8556ae73af65a1b70426dd71b35ed3bb3a886064e78fdf04dea. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRUM72400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed30b6cc76bfbc03e3256db55278d0c1ee591ff4217dbd049e0fa7e97e0ac9c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXHAC2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daca708dedc87a2bcfa7f21a2e03f35a3abf61322e44ff6ed089fdd941891c9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BXHAC2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e4eb6254ba08187e038e353d34e1cfdc94200f7f29045dafe6d46b4e78f427. 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/BXHAC2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74b3809438320826c722f36bb71375f18291e8ac488cf642f0dca6932ec1f58. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXHAC2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81257ee4e0af2a583f250ef2e35bfdf99ea58fa6da81d500c8a0d56d50cea45. 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/BXHAC2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc01ded313eaf11a7064fa2334e9cdcc2db2e1be159d78ccfb607ad45de3f0c. 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/BXOY52100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f048fb13232ced1d4ac39c8c6a8a8e78fcaaf99052f6946255208a3c794dfe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRSME2100898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131d5605c1934ff37e6f534263c266f264abc7692911f720319cd9b6aa1e881a. 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/UKXN21983982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c935fa2e196d31f3eac82cd3c3d2c3d179d483f32da583f89d05d4d6e9bb074. 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/BXHAC2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f02c52cc6dc8e837b8b5c9283245df0ceb693a9381a27fcef95e6a9393d25a. 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/BXHAC2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c18389a4771701756766419effa7ce6bccf403bc963d0b4e7f232c8c86f59c1. 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/BXHAC2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2885a983870cd4868eb9e93e81ec2947d0ff51b1a0ec113ec7695e58dd1ac61. 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/FR96X2454438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc570e937d063663bebba5537d2e6fd53f75489095f245aa234e4430bc11d95e. 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/BCCLR2200016.