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 0x8b8bdc8186adda775f0288e683b5263c70b3e9db0a262c25c0263f653acba99d. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4961f9d4-53c8-42d5-9d59-a7ccdde4ddad.json and https://artists.proofprofile.net/proofs/artist/4961f9d4-53c8-42d5-9d59-a7ccdde4ddad.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 0x7a41b93c42ae1a1683bf40d75e684ffc6f48649fa62a55e5f1eca5030f495ef3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3EX2583290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91780d8a5d8c0f9b444ee8e68eacc4f7543c24b19d34e36f9bc5f80632b05fed. 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/QT3EX2583282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51197a35162b0999c68deff9b030e324aa7da5e4b48b504ac8e0e60b44d86903. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3EX2580654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082bedd5d0239d1a3fd21cd9c8646acec1d7536679c48db81deca4cbedffcc94. 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/QT3EY2511743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9ef8c652424617f394c5533f72d14fc0fe004f1bbdda713935a931e3601686. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3EY2514881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7322344b098934317fe9d1d77c7eec61683af77d40782028724e642c40abbe47. 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/QT3EY2564187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4856708648c9d678eab6e917a8be3d546968dbeee181bf0825d43581e51aca1d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QT3EY2578834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8fe753997dbd3a803af3016163d83dd4f0e30a4d87159c0b14712d78e492cc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3EY2575783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1401b12ae9f3ea494543086155b17185493c6172da132e66e7038700c5099e8e. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:41:46Z), 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/QT3EY2575791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3b9351cbf00a18265b76cfe2a664df2fc17396f765c7befc0db4692cbd8318. 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/QT3EY2578832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925ebca2a41c9c3cd66bd8aab8ac6b7cc13cff77fb6135aac23218d1a526a844. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3EZ2525608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb831d8372145f1acf4dedc2fdf9e933e3cf43bb47b7d949d8484946db4bb0516. 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/QT3EZ2527410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f340050b263aa9a9c3051841b619ebc8f70856799348bafaa4b4437450ee82. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3EZ2592168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5138f5cf91273be20560aed3f81a6aa4cb0b9f706201912affb2e5f7dae7c522. 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/QT3EZ2594694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7424bfc8e551e6d47529871b9f470a7538871173078a4d7be5a890e6cbaf0a01. 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/QT3EZ2592179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97092c4b227be245787e23455f2f480408b85f2ba04926f5c0900898122297fb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3EZ2564778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b6d0f0ff7e55d36a1affcef08a0a7c49c9209927efc9fd7e9add47667b2a70. 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/QT3F22542796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6244995890e3fc4cc2dfd3d6991487276feef539281bdff5fd8a9455ddfd83cf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3F22552232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903d257af42a58afc4cedf9d6aa456b076b423f0ef817f2907e0057c8f931bb7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F22545456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a67588455eb56cf468f75157f4ddd559c4cc50f4ce250b33439d6a3bda1159d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3F22557349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbb6a7ba712700b6c14518e031100f919a409ff81af5134497dce3dbbc5fdaf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F22555590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e725df3aab5986a0f8919ba2ba60369342244a73547bd346865b39889879481. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T22:00:55Z), 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/QT3F22587978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e2115f52bca95514ddc97de95db98c5aad1de84c75908f72cdda1560b6b6b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F32501229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6c946c64f9eb2f687bd0cc4a6ba11d5009fa58562a5ee2d6684ec1089b0dae. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T12:59:25Z), 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/QT3F22587981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaf6f9bc02fce2e04b7f12e95a9d5adaa78feed24bd7feee27b008f04a38482. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3F32542936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e591c74165869d7f6bd73e23bbb1ca5982c7e6963a93b96807dd3ab858facb8. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:39:03Z), 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/QT3F32540720.