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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 0x7df11ffe25805f2fd4776e47e3a43d082757208c207c1b2103abfc20d1073256. 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/d8aa81c8-efad-4fa0-8bce-d224f240656e.json and https://artists.proofprofile.net/proofs/artist/d8aa81c8-efad-4fa0-8bce-d224f240656e.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 0xbdc2200aceea6cc60f0f8d479b46084d389046eec872f3bc972ff095ef4b3fd3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPV501700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9604f27544d48138945161cb0cdc54c11e77bb2b8a9fb32f9b0681e4081dea71. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPV501700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9db2d918e89d9c2664d8a88a79727c2620f94013c276716ca1c5f158667721. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPV501700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3136a7c3442c3b8ae839f5459afa531a51705beb8e3a744018ba53485a836ee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPV501700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcca3e4e23f899245f13c25eb913fd64314535f757ca3f187996b40e5ee19a92. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPV501700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28833a3812d15b9f62dde60a78394ddd525363e2b4ad6db9f080d672c9a12914. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPJ901805440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2159ab7101814fa8c3e94c4d57805530df5e54e9803ee80a897f6bf21704fe9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPJ901805450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcca9c5b9bbfd8cd4022a57445480d4fca357be55cfdbb7518ab8cb90fc6526c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/JPJ901805460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048201df74c0167a83bd3ce46955a3c1c785db810da5734401bb4b8e291c2475. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/JPJ901805470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b11eb95779858bb75a68ef32f526a0332e617321f60afd09ad4dc740ae93cfb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPJ902103300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a40ec122b035e893820b02a992be82801c21909a5b7de54cfe9903d9ff2d72. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPJ902103310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbef9e468f995ee175a88d7fee9f312a912d300efbefaa520dbc066b0c58db4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPJ902201720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298c334c50ec7e1dd9e7649c6a295fbc54e81e7735699d51fb767ab74ab67b55. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/JPJ902301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe21bd7c4641f9186ae674e0d835c28cf65dd34839958d24c48056fb0b38cfb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPJ902400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125089811aa2e9064c6be0d9d454da56b3665204b8511d59ba027ec86d2b4ac9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPJ902401210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422b109abafb16105ab22aa0ff476983363142cf9796eef92ec87b620eed6e3d. 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/JPJ902401990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aad684c92777b01206ba5f08822ee48c99482ef5436b3f00aeeb0b5f3ab944. 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/JPVI01721850.
mokemon - From TV Tokyo's "synapusyu" April 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71852a04a9a1b16ade1dce2114253300d804e62d06cbdb0302301519679d5f89. 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/JPR232401515.