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 0xc16bb4baa9167c10a441ba0d7cfc2a2b1847f3ee767d41439163bc0fc33f20c9. 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/aa9c4289-159d-4344-82a5-15f22a2de3ab.json and https://artists.proofprofile.net/proofs/artist/aa9c4289-159d-4344-82a5-15f22a2de3ab.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 0x1e2ff0869f458535299ba76899fae341049fda12751a458d5a8430c1c6d60cee. 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/JPX262100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e41032456c123490d43464e1f82489d91a00fd1c79b8e3793916d78a48c3b6. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/JPX262100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fd673b2171488c42f0550617684587e28348f96f34d81586de693a2f04ebec. 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/JPX262100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f99d6ca7a528700d1bcee7e9f98a182c1abbe528e9a0092c81784e45c3bd6df. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPX262100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a330ad538e2fc62fa0a1024b7c243a72828d9aed27bbf82f797b9d5774a8ae. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPX262100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2567ab7ed6bb2249f24684712ca519e1251cad8c3229fa4fc66743ad543e44d. 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/JPR502146774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c87c3a74e6034a7f03b4fb4ff19cea4ec5a94a175884ea7b65bb930317d3a98. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPR502146753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a3681c88139b46438671c44233c108f4f4ca7940f137395fcf0aa32fa101c2. 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/JPR501927720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94ccefb0ffac529b70f7cbbeca47507c4d261b0b2965c098012a75ce66ecb44. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPR502146754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894eb734d98d2dd7f8005f6fce5562a424b34f8b78478577dd32cdc3ed26cea2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPR502146775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd593b1ab175b085a9c034bb5c3639ccae2dfee9e9e89f6cb1ce5faad3eb241b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPR502146755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356e046d939b3b5e31165590f8fbb52957100a742c1a7528b18d02e6ab3fb25d. 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/JPR502146757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83af21447839049520304645cbfb61ac552b98e86cecea9408b0cb442da18ad. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/JPR502146756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb7f5d99f87154360ddf58d624e73012e646f988ae43f55593ce5202bdcb5fe. 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/JPR501929922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c291c5566c664f3a051941d2529e8c31e8173022166297894ae7ce0a5f9387. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/JPR502146776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025ea090bfc6fda16f75e1879a80b239145ee33dad5e9434bbb9a2ce0374ba4d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPR502146777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951ca52a46ca7770b41fdb35e67d626093c3bc17f2cfa83203fb851b9b682af1. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPR502146778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72352090e767191746b5c08d42a3cbf0867db396a0dec41f23c63fea23a46f3a. 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/JPR502146779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135a73edca5e740aa45db2e6764b00a986877901c8e59f5b67ad2ec85aec6bf9. 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/TCJPX2377755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a04acd59f21cb11058c111ea630cbd3b5feeff979fc39655e0199982808f3b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPR502151384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcef0928d2caa8a20e29ff4e5730208db47c77bf3b9108a21ab90557dce315fb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPR502151386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1a1bb70b45f001a1f28dafef23f8d5bb525d2cb353d9b8384e4f17ddbaef8e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPR502151387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4f7fd7b2983dbd111682cc5986be51aaf6cd6a6aa0466f98edd7934213cc26. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/JPR502151388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db3dee2a780b6ebe4bea72faee0e204b31ad8709644491e1060f445518c89f6. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/JPR502151389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2765f1aef221c7e5e92096a1bd69069de36d9a7c8c251078c9714658300c5e2d. 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/JPR502151390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f73534a856ffb3c7e1d1109eba03b498fb456ebf6410c46c71462aa9c55a7e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPR502149488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb7f5d99f87154360ddf58d624e73012e646f988ae43f55593ce5202bdcb5fe. 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/JPR501929922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fe2ca048cf4669638dff7258520242647f9331d0033701ab2c5d78241c0537. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPR501929923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac530620c43ebaefc382f8eeb5ef4247f1fe170395d914208545a670f914828. 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/JPX261900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df4d733deda51931b53ad213206ada9b30dde7d6c66f1dd59151c1d85031cbe. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPX261900021.