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 0x36c125b50eee86ed18eba9b7717700fca39864a55d302e463cd296093f491173. 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/606476ad-e8c0-4623-b251-0af9da10c7ac.json and https://artists.proofprofile.net/proofs/artist/606476ad-e8c0-4623-b251-0af9da10c7ac.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 0x20170d0537ebd9b463bb0194b060579195abc5337b751c31696ab9bdf7f7378c. 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/USHM81002864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86729e6934023472c3f780132b6588076de430f31761a55864f9d7776a8b19d. 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/USHM81002866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42109e2d21e5f81fcc979a0d8ede7916d3f378981fa1f831b2db4df7a3f49f0d. 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/USHM81002868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebdc60ee905e8a15a15e083eab8024eac9d91dbc0eb2b98d1e2e89b9f806292. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USHM81002870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa621380adf420b00663c8b35cd95ee33722d7501a3a085d5eff0ec85a60adf53. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USX9P0913957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b32a1f7c121699cbbfe81fd88f8726fa0157d0d500f5ceafe1ee9db491354c7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USX9P0913958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a453aa6994bbdc2b85c2d6b4a023b54a56933730cda5ad433a11139ba56d5e. 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/USX9P0913959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2305a791355f345b077132d5d72a75a5da4827472433e215a6287c753b4d536e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USX9P0913961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fa6fb76bb43d2f880ad39dd148b989c19bcc29b748a1796e18d5acabc48579. 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/USX9P0913962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c569473349b83d6a48fd37e9f1b1aad6f00ef487752624ec024fe3efeb15a32. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USX9P0913965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3762ead083614a6f77d0edf24ee04a35f1d734c21d8f4f8d838d52463cf741. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USX9P0913971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d352b4edd517a430f5fd442ac51bbbff2f49fec6944fbd04ce0f0004978f3c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USCGH1289050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d21b5b9f0c6883423f39f052f87a3d1fb8a92d43dbc74ff8d7d22c99526478a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH1289051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00781091b311129cc33d1fa600677b26274b52154501698c608e3b6c78185fa. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USCGH1289057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc925b13c75c004162d1b2d1ab9e1b98bd41311e22391a054914c161160cf8b. 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/USCGH1289061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b839f968de5f1e6b7678e83144f9a553c39206fe62af0ed85f4770b72f6e67. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHM21600585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a1296f684fd70f6dff6d216d3e3edcbcb574f545a31c2e649ee075ef9559b6. 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/USHM21600588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949658227c39161896c7fcd15793306208c2c207e22f8afe7ce3f99ab47dc6d1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM21600590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c912d7ef043ce5a35d2ef86d1fa5830779db1c2ab99002960fa36f65fa5ef1. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USHM21600592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040c508828e5f0ca0c65aabc0b9348881a64818e531814e63f1fa4174062d841. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USHM21600594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d14c88029a46f3fc217522015c3cbe532060e98ad6e34fbe3528107d1c232be. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USHM21600596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ef82e07c1aec1657b5a71112b629302a3cec2d2d81562ff11c022e6558d065. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USHM91786751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd228393737de33893d8853e3c6c2a7b14a51c8d1cfb4491594228a028c26d9f. 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/USHM91822038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf2b85445114d06be432f1235c7947b06ff5ca3fe71c3439f8e5204dcb32411. 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/USHM91822042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef24626163d7fefc807836cd3fbd82d85a25acfd66332c42dde9e265d7fd3bc. 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/USHM91822045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c612b07d2f8bf3a928c713fa7bbb005c92e674f7c37b33513b6d9722bd3e2f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM91822049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afb964af0016d86118af330489ff77bbc934053c1519cb7afd79d6f84c444fe. 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/USCGJ1985302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862b953e1148c1a730958db3e2ff3785290bea22ea83a1ee17d4bf786f33963e. 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/USCGJ1985303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf388820e0158ff984848910b579feb9b498319a1973e5810e30ff5e077a12d8. 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/USDY41960510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf886fbbd0c88af4171f694a84a7959dbc1b07810408e58fa5d078d2b5c7d65e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USCGJ2085493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf162214e865eab2285c8ed932ef463cc354239114da662deb0d9018d572bfe4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USCGJ2085498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3687417406e3ac4538752f286e1586d15e7258da093c408c13562df52388f6f. Chain 2 (Bitcoin): anchored in block 957689 (2026-07-12T10:12:33Z), 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/USCGJ2085499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8431c012a900d315c7c3ee8b1f183faacc185fa8bc0e5a5a4edd52ae70aa8d. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USCGJ2085503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cf240b6bec802c34ca3a756c2fddd01b2457eb7d86d84766f44f8dbb395709. 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/USL4R2075705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce8451145470696a8dc3040417d3a8192f14be19a8cf6b599da3a16c9841c42. 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/QZHN52152962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07770b2c89d89a8b0bd1f10687419b04e16cf8b3ed5cbaf5ab3096e5e51724cd. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZHN52152965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5198169a92c2f048e19f1c7647ccffb09b9463376c63f2aab3260c3d1e6f4177. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZHN52152966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823aa558e06890be186f7fcadac3008d0d8fd2eae9aa04e4c95da8b39dad9fe5. 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/QZES82184124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a5683be7310b39470d64104c54304fb7529d2be9ef0249975c697d9a94baaa. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USDY42356258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde550070990ba9e6a1526a2ec2b2304abae6413cf9cd0170349e2dc149eed42. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZK6M2349150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafff4c91728755195dea9ba5439397bed19a19dfbf5286006751fa75ef1b6600. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USHM82325898.