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 0xf067c907cab1a5070b9fbdbb6ff65ef2aab476b1750e1add0df538c6269d050e. 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/8011e653-3240-4126-af11-b09e8f76da26.json and https://artists.proofprofile.net/proofs/artist/8011e653-3240-4126-af11-b09e8f76da26.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Six's Music Box (from Little Nightmares 2)
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 0xe62ffc1bec2f30769f0929e8f4660803c903f48018069e108dfa0271b3f0f7f2. 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/FR9W12207492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea2dfd3aa9d5ff4de921f2b6d260f4dc7ca11eed87ebe9259b418c8da0a7b31. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR9W12207493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b30c9ed845287b122007b5c5ff0ce1974d845fa4e728a8627c274e12906206. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FR9W12248476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a39f3c4f30dde9f796a14ab2763eea1585a5acbd6e1270c0c6f208d718a696e. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/FR9W12248480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3085e63576db22fec0197c1918af1fe36467e6822990b3e92e25af9d83d79331. 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/FR9W12248475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe792d8c392a45a686067b5a67b4841f3e5c91b108bb50a93f5bd4d8331e2c353. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/FR9W12248478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b062ee5e8dd1e44d5db20c495d1ffbe9a37374b6c4ada2f4f13acef47ea985. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/FR9W12248479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e51d6801e4ca1f7ccb633a3341dff931c670f50183fc98840e0e302bb2bee1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR9W12449318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbaaf0841a4c843cd52427ca7d26892f5d5fa6f24262e6a66c47d03c778c1e4. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/FR9W12340386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04154d2b3c50d4e5a9cb0b06b112239334db579ec1665a9ba583ee701aa29adf. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/FR9W12340383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17819a2b6d87c2a040d8d374af07b18e6149bcbfa4f36b07f9aa5157f5927955. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR9W12411908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fdbc14b87720ccf210dbaf58da5260dd0707e0e24c0078eda957f5f76a535d. 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/FR9W12411907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303ff4225c99ae29b669ec99fd5d7f4dff69729f5d7c528058fa23e37408162e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12400964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1338853d5e1413241e796ee1bee7b570f8b20c24e1456517dfbf378bcd82dc. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/FR9W12406372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda432f564ddaca07627bb938e832b2c4bf2a1eb234050e8f4538082ab02f99cd. 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/FR9W12356270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e192589f1993c0bd2e88326dd7bae0b2d2eac499cd2d5e9feae87057141a26d. 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/FR9W12340381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c83f960ecdeae16693e5c98ffbf5e1dbc96be704b403eaa87e855afe517dcf9. 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/FR9W12340379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa112da9958a138ae598f1527d34c11c1acbf6348981073614738f326b8d3fb7. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FR9W12340384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0165b72e9c0514f49122ff928c99cc4cd4079017c6246b379e34b909417673. 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/FR9W12340388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363b77f9e1af8324101796dd2cb1bce2ba6a751bef9033a5195789f4edab5659. 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/FR9W12400966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92bf3b21b24332b14c455591d90a652b8af3ed5f71bfa33a82da176d444f5f8. 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/FR9W12415151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9306ecd496e7e3908d205b9e521991c3c782736bf95239714704831c57fc1674. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FR9W12415152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c385d9c5bead3c99b5bbb3ac0605ccd26a482aeb841229fcd94728c30f7676. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR9W12505337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b132c698cf1ecd1130e8148b880fd53e33849e3ae74118123c1605f054cba15. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FR9W12505338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01b9444361303e7e2a1350dcf3d7c2e8c6205b09c9a917fc8e169fef8da1ab9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR9W12505339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5014ccf09b5b91af8b888332419a24f6fe5076cd82e63093f76aeae115a93a90. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FR9W12128455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b5f4f09601e2b827954f931ed680299d9725a02580f6ada23d42dff186d960. 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/FR9W12517334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2982360d40e4b677cbb3543278f9447667bda2a9aafb67694e3d803f58e6b7. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FR9W12512730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf18c21afcafe46c82eeb42576bffc6027c6f155a420a4d3fdfa31bfbe3870b. 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/FR9W12526089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e965ea8f987ab090cb07c7ca9723c8caa7b4de4ed87c45212a71653709ccb6a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FR9W12526087.