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 0xdf44cbf57f383c3dcf5dc687c7b311f4b6091f4020a40595bc2f28235d176cf8. 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/87c81146-780b-4b22-b2d6-5ff116724b9a.json and https://artists.proofprofile.net/proofs/artist/87c81146-780b-4b22-b2d6-5ff116724b9a.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 0x79fec080a10b588c71663ea41799ce58dfd74f97e3dfa2b7434f00056cd01db6. 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/NLT2H2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9783183fba454672861ea2268310f4fd877d9edd6913f0a9dd1c7615bc602f8b. 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/CH7812414626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1b32651edaf798a7422ae3049d668b1b0517b75c5fd5cb48a75e735fad5056. 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/NLT2H2400748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37964d7c83f4ea27f18de74caf066ccf1369fdef45f6f5db775bdbcdbcc53510. 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/NLT2H2400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e05704b2f1046e5d562a6d0b3bc425b102b8aaffe4f2f67fd80754e84e4ba85. 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/NLT2H2400275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2446b3e5af1e87a715c28f72b1fd9ec55455cde195427e71028d2656e1dea0d0. 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/DEYT72200615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef23ed8fc83e33b5847fcff7a583f017665b01d46200ea834e21088eaf3c6e9. 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/DEYT72200420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26365f575cc5c667d3fc87443ecbf23d66dc1ba6d4b92f1e00a6d2453dca4b64. 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/DEYT72200385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc71b2333eca0f7f421f4e74d709cef9c024247e992c050abe13b68360cd748. 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/DEYT72200295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0677618a02a0e9788be1d9c9ee9f43340f464f6d12e053147e8be05ac7acbb. 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/DEYT72200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e1025a42a948b3068a80008aa825f12514cfa117fe4cdea07cf84a3a637df5. 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/DEYT72100680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783c3bc9c7f8e079421a739c04ca0a8f1b45c7a118f958e01a838f11ac434016. 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/DEYT72100596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242ccce12816f519e181b972dfd41184c9f2cf8d9a05deb9e02e29c10cb6590a. 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/DEYT72100581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f451e24be2a1c987f3c8df70b3890dd8f4c5969361facbbfa7890b5ea17d1e7. 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/DEYT72100544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486132a8d2605afebd18b3adf62b0f322a2a0748ef7b67e3bfbb068f22390ebe. 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/DEYT72100502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbf0f69f0cd419d5043bd29474a016c7fc3ce2d5a7daba1541180a04ad405e8. 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/DEYT72100423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6548385c899e981cec4377f9e76820aa91862f13c02728431a5e4f9507056e2a. 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/DEYT72100371.