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 0x598bd2a03c3a3a047607d9d0a8c0a696077f2ca3b91e41514cc4bbba6e775730. 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/287c7d47-3bce-4b6e-8a38-206865f4d519.json and https://artists.proofprofile.net/proofs/artist/287c7d47-3bce-4b6e-8a38-206865f4d519.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 0xb11fdbe4ebd221e17980f0461abfb83b6fa5627d51ecd47f57e300410b7ec5ce. 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/FRPI62300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6437a6048204e05ba81581854b3b30d32e5d52c6d7317778dd39981ab6dc519. 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/FRPI62300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01668024fad8635fee84d83e9f3bb8bc8bfd276a0c9419dc3c996a30a57966f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRPI62300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1931bfaf6be683f6661d06d9328a44f0f2b49b61fbf2f331bf86a73c5de3c153. 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/QZTB42260229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf628a8ec3b79c09c95004b7ba1a9d02e9ccaaa6d58ce050d097489f3d52f94c4. 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/QZTB42260230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497db65fc2677fc1c0e34f380c4473c8cc66028856d6e81aadce833c37626722. 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/QZTB42260231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985d2fbad2cefa120432ca51ec88d5a08e093a2bf3af31c7ff2122a7acc3aa75. 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/QZTB42260232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c2ac053a549ee5d86787c3a39c7ccfd9b9946f41222b169f4ee2eb7a060e99. 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/QZTB42260233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac98140fac54dec0f2977b41087562c249e9cd4617c86b9868c7f5215fbb0e7. 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/QZTB42260234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945cafd16fdfa2b2f9c27e5d8a09ae2ee531edb68a01ebd2dc5a1d6adf4abbf9. 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/QZTB42260235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9840f5c37215b2b4e3545b907a2b3682240973e950616e84c508d42d2189d23d. 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/QZTB42260236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdacd66091deb8101093dc0f18ce65f893eaac72846743a1c43782c28c62ae2f. 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/QZTB42260237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998321f5b9de59e3075379edd96c7f4ee742321ca2573cb5a8c8edf71ec7f932. 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/QZTB42260238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cafaf16d972ab1d7a1b14a1c437c9527f6d4fc343ee9c5b017c76c4e61645a9. 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/QZTB42260239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09889c992632aba7a73d0ae61c214dcc8f153ce9e056fe448c2bb71effd56ec0. 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/QZHN62266050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c50d3215014eb8454d9fb38e3be67764671beed56532c3715a69b2a6e06b061. 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/QZHN62266056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c432690d0c00d281cffef531cffece0709b962b880948bc5038a048af3b692b. 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/QZHN62266059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8069c104493bb5721d92aa86aad8e36b802e369a8e73c99b4bbf6ab9944610b2. 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/QZHN52453880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6437a6048204e05ba81581854b3b30d32e5d52c6d7317778dd39981ab6dc519. 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/FRPI62300130.