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 0x6a3a947695b203b2fd7d8bd8417e9c0e45dec81956e8e8ece5088741af6d6bf7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da711db8-3a88-491a-98f3-4755e33e243c.json and https://artists.proofprofile.net/proofs/artist/da711db8-3a88-491a-98f3-4755e33e243c.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 0xdf9dcc31daa3ef5c826c114ddd3545b9562f26648f08c600a70fede58d510be3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:28:17Z), 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/QZHN51954866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e93e01716be4526f010f6e964f2191357dbb012d214a0989dada97ebe197e91. 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/QZHN81990702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7febe106138ece6ab5e5be9a2deb99941e4c1ab16957a94407b4587877c77da2. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZFZ42033660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f39ea23351820929a5c00594d2c51ebc712e2e093d9a84111bc33492288b6fd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USUYG1412326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d2af119712f9313ad4e7ff5939b8ca5a38ba169b9f36e39f8fe6a15e11bb61. 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/USUYG1427022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f3c776b2650edb69dbf130770d2607e76da73c6a2e1f2c72e3fbb6b10e77eb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USUYG1434491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f36bae47b7d43f46a9aecfd885e7fe0f432ea82a6480c46ec607154f527175f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USUYG1440773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6996bea8a7a44090e8ff827163761c94f49716c57f735ea2ff937f5ea8bbfb3. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/USUYG1464138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05194260f229c3c749255f6ad4aabcdd253497fb037fe00948abe90b0c7cefb. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USUYG1489654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c483b53a8f57004caf2f94b77828cd33316d6ab3f8df112dbcf396406c282e4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USUYG1533640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddaf643b404ea82bdb1bfb697cfd5ad94ae619f0b46bc8c0bc4799ecc16e7f2. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:45:00Z), 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/USUYG1538394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345b5ba617f45070c9167fb71f87a9ca42040bf2ca4843a688a1e7a7ca8e9ef3. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:53:31Z), 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/USUYG1574461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3fa5a845301e5cd4dc51d05c7722a988243cbbb55726c4e2025b11f4fd035a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USUYG1580040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc464dc110757623be15d9b20fee5a4a6e9a67e45059988fec712a63a3796bfff. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USUYG1587824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea03b3aa4cd99b007c71ee3f78d9d76d1d2e4ce26d4200ce5b7d1ee02a35560. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USUYG1767062.