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 0xdcf2262e27e513f269efbc19fd44d8abc3e712d661687367fc1ed854d24f1917. 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/9bb26bd3-0d49-45b3-ad6a-3cb49e8d6198.json and https://artists.proofprofile.net/proofs/artist/9bb26bd3-0d49-45b3-ad6a-3cb49e8d6198.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 0x01cd07a4adfa36eb14a6217423ce4c5fd4437aaf7ccf4af385e4c48d3d2b7c05. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAGS2363120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3282d092c42527becb32a5d93b809ccad2a1cbb8ba626b326987b9e522d5235a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCAGS2355015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446b06f5334574b39340e3774fdfd42936d5773f542d2ecc403353734dee9d47. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAGS2363245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0d2d53a22efc2be63ba98e65dfc3b5a65385fe9eafcd0d4390b28c15ab7a9b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHP2370571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ed9e78afaa2e53fd8425b08190ffe1ec8e14d2bc1bd0ee5d931f405a2b09fe. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DGA0S2449359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3525e22de01314973767808dab61767ef305df0800ca5c872e5c8af98ed36742. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:26:23Z), 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/TCAJD2403027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03aeb689a8ed5a7fbd88ce5f3929b7ca805420a1606f4edc928c8e8ad26b079. 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/TCAJD2403040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5633c372e4c685ecad3b9f49f65dbbda62e37b51be6494c581dd6d63090739. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJO2598902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173b0f23d9132eeb55976e26189a1e5d96e40d446175197ede3305de64393895. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAJR2522942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813d20d6a148f44134037ae7e7463d573e3a2378cdbc4b94ce7b80de2a8731a0. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJR2522838.