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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5222a38dd7b909b8c516988abec83f409eb244f399a9305e19c116eb5f7ef4b9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7409953-6baa-4d00-be76-2f2673ff1716.json and https://artists.proofprofile.net/proofs/artist/e7409953-6baa-4d00-be76-2f2673ff1716.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c8345868f9d430bb3a8e5adadcc5f0d2115f1a62f0ee2333ac4eaadc2d464f. 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/QZK6J2174434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4a5079d133b83edadf3bc00f19bec295ae0f2559e1bdeefb4415c2bd7be395. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZK6J2174435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5821bb2c9ff4eda7f491e960f53e9c2fedb15256091452c64bc3b5e4b972b74. 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/QZK6J2174436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6512f8409dc7cb828f0f87b27cf274da39e3b01028f3bfc62d34c5cc09a2898a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6J2174437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9662d243d8599c1403d31acca1e1228b2ff62d944d11488f664eafc49bdf0751. 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/QZK6P2243401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed58131c6da468273eb3037badd0adb445f71cc58088ebe41506469d44d0df96. 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/QZK6P2243402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507dd4513a7d208803a444091ed8ae1f1acc8de10c101bc9df3f4b0be27f37cb. 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/QZK6P2243403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a234e4a885167f3bc79d12af6464a0b71e09ea9915fefea622aa5ad300fabb1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6P2243404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28da26f9e3d4c98889b5f1b238b3b299b38a7ff8476bb941b58f805eaf59f161. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB62330974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8065b5682bdf01ce99632432897ea40ede6826f2b40b14d116a95bc78429ab. 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/QZDA62416981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28da26f9e3d4c98889b5f1b238b3b299b38a7ff8476bb941b58f805eaf59f161. 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/QZTB62330974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69db08a366f9674d154944bc5a009fe95782a5d0c832c1917c84b432c711f11e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDA62416982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ac391f97b49336eea4834188ce461acd78a727d43f4bafd7004f151101da5b. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZDA62416983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd2fbfc0b84fb69a2660eb5ffbda829cd06e3c4ab2b5ca0ac5c620787e1d162. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA62416984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b8014c9b35632940821650c22db28e5c71dbd568a61cdaf4dd124407894a2b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA62416985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be56f639695baf15abeb262e8ee67387a4ca7d8ee2bc822f5c3a285ff3455d5. 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/FRR642200143.