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 0x2890f2d05d9bbf30e3a44cafb62da343b7babf5210532d4d005f17b60e29ae1b. 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/40858312-a07d-4e86-aac6-acb2968904d1.json and https://artists.proofprofile.net/proofs/artist/40858312-a07d-4e86-aac6-acb2968904d1.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 0x65d051982171714f9bc1d00bb50ad4bfbef3a163f4a4b2cecc9b5407adafdf9b. 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/NOAGW2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae6a344e2ae7bf97bca33ff9dc84afff23fa747cde2261eef6646b3a64ca530. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NOAGW2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8394bd7891386d4ca95fe2044cf63eb7bf6d319221a576c50e5dc8a2954d760d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NOAGW2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ca2fa20e0a6fbac0517ad1b8f46100f5f2b60c41775fd1400cd82e87fff389. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NOAGW2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3374d4d4f6afb80f586c6cb049bd14b85ba6f1c82a3a884977ecb2b9bccc28. 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/NOAGW2200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e359a876a5d28c6ada9f3a3eea13d7b2803d50162906def7bd0c82ba835e5b. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:48:01Z), 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/NOAGW2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6db2a52646f1c7298e438a1de650d34422faf8fad7b020cc683476ae3ad3373. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/NOAGW2200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa267041de9388b7df449fb8e6d46027e1328c746769b6d9f2207caa3e7a34a69. 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/NOAGW2200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc10de07031bd6a20d8aac530c22adee45a498fff09952ea49fbd18ad14b03af. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:47:05Z), 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/NOAGW2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e29240b97bb845085e7c51f83ec9021bbb4cfd5f21dfc5af500774c61cbb507. 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/NOAGW2200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbf210c05101d7433e8ab413dda210e423d9cb632f04b6bfcf90d52842a6453. 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/NOAGW2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fef96be7f251227150402108d6698b1413ed19aaa36a491c330e26144f054e. 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/NOAGW2200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f420e9071d33810b1c1704ba650ea94d56cae57313e2e6eb7c6ec3323549102. 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/NOAGW2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef17cd6284be4f8ed44a14109aaeef7c15de4699da6506ef337ea96a9fcc1557. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NOAGW2200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa754e48ae38482461d150f377221c8e6ebd0324c45d0b5dda71069c688cae942. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/NOAGW2200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d9106b4cdd309173b903f3805b579a7448a03b56d356b45dd0707152913df7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:06:11Z), 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/NOAGW2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd2d3537cf3b8f9883bbe8e93a1c89499a323182cf48e0d9a51096a23714b7b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/NOAGW2200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95e9e8be7a79f8d34b67caae0a4d1546683809141006e87b017ea434173364f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NOAGW2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c533a08eaef23335f487ef4afe311fff9685ea680c62ec4fe13a358fef89b1. 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/NOAGW2200077.