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 0xacebcebcb28b19fdecae4e349a7c486a53d933c7b2f8cff2a6d84de8a79273fb. 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/f6da3c48-3a5c-42c7-aa94-6e1cb68ee480.json and https://artists.proofprofile.net/proofs/artist/f6da3c48-3a5c-42c7-aa94-6e1cb68ee480.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 0x742702bc15352ecfa01e9d0ea85b3d98f6af1350804c0989c906d1246bc7603d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAET2078716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc72d842189778261f0b6536aafe58216a0eb21fad8ea208f8a22f51f4632846. 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/TCAET2078809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459a6a740177f078a3fac4baa137af41a68f5d9085db10b47d29e5598ae110eb. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAET2078826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e2515e58fbaf5eab92c4ec5821c84f65251fb7b87232d6e107110c4e8791ef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAET2078943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafff6bba366a00df8adb5e6fb54ec13cdb9ee9e2cf8afc85a55c4ff6e4245455. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAET2082810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b75d49a62d3a4419b015fdc0da4cafe96b78a855806e32d6445cf9ea5582f89. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:02:24Z), 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/TCAET2083046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aa5a9fc87e0dabd92d49516674b954fabdc26f264006dfa190baa16f89737a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QMEZE1886087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4914d012418dbae55417eace0047ebaa8c68f82e76ac6444eaa902620d4e2f3d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAET2083282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964b38db579eaf9c11bd036a2507577ea3eb86d49bc756dab45e4152626693b5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAET2083290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f6c0ee50e694611b34cd4c6aa64f3737407c0c04290de9292124891b95a319. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAET2083303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d719cdbb5d55ca3c353c86dbba17b2a201952ebe5221591dca436ba0158da6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:11Z), 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/TCAET2083321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8cf50d2a3cce2055179544f044d6c2bf932fb0f1d762c528033fd207be86b7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:45:38Z), 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/TCAET2083329.