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 0xffa97aa7c614f6c760d2a423fde98c7825802a14b38ce42908e775ee75a66a9d. 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/adfe9d97-0aad-4b49-ad27-16e6c1a0aa35.json and https://artists.proofprofile.net/proofs/artist/adfe9d97-0aad-4b49-ad27-16e6c1a0aa35.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 0x712006bdff60ad2db03f6a98b32c04dcf4876ec2190371e51795463cf36c2783. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USTQJ1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bebe25a5321fef4fcdf868f7945ac13252fbb13e2f51719715e63085480a93. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:18:24Z), 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/QZFYW1972986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebd75104ef4a382bc5c1c945330c0f97831ccf4368f104186ceebad74d2977d. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZFYX2006593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd520fb50006bcc690a275bc903ad948cbeb430f36d971d9d5efaf9f248db985e. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZK6F2043371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90de075867a102d4b5a3eb64135d8fc53f64247f3e2f10ed5b18347a9daee0ef. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:39:58Z), 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/QZK6F2043563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b6c5c3daa6a7219649f5fc96e3b9f2c303d7bb078fececb5946ca5cc076f89. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6F2043372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314fb8448c8ed886ee855d646d8eafadea71e6a8b26e1eca4a21b1c1e099cfba. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZK6F2043564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce98cb6db56a601b7d42974f00621ef9ac54630e8088da7df6670fbed22698c. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZK6F2043565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b4cd8c0d71694ddffffa0d451b8d3d90e1f5be4539826e4977a78b9da3019d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHN42128815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d24393492c66e630761bdbbe7979595bf800db53ef01ab506770fee6133ad5e. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZFZ52009283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4f405f5d69cafe715466161eee9fc01edfd3cf812f273e4a9cc9891aa61bcc. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZFZ22165236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb3435ce73f154b51204c7db7e32b2c433b96e517d979729ab4985b9cdd4bbf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6Q2030625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ca9bea60f1b8224d30bde8e7bb84c7779a81b3ec1cbeb49caf82e339717ea8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6F2144668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a4113020b0cacbb3b4a03571957e10358dbc01148398f5ddcaa6757bf3b1dc. 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/GBKPL2290032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eb50df621b6abf4180d283131c01b699db955d1f52d27e0142ee34bdc40ff0. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/GBKPL2293972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611dc2ddeaa8f93935f1401322f69bce35a8cf53994cc84926d3d46d66e3afb0. 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/USDA12314059.