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 0x4e758dd1fcf03467a64f9f1690cdd0aa0a5067b56d3ee04bf7f41189175d884e. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec4ce316-7abf-4c1a-890d-d94326d1ce40.json and https://artists.proofprofile.net/proofs/artist/ec4ce316-7abf-4c1a-890d-d94326d1ce40.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 0xbe7ad70ca48f241ab3b6517dfc31b2519915bda4887f2765e1e63c38a54cc27b. 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/QZMEQ2291417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a7e04884e887dac1ec63f3bd1d562121c2e149bb30b46b62ef9cadb7450b2. 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/QZMEQ2291418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e17f3a487a1e050ffeec00bdcc581781f993dbc8dc509894a6649aa5202be20. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:54:37Z), 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/QZMEQ2291419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235463e7b369544211db59bf6f8023558bf55e1109e7066ff3d8fd3c0133c325. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZMEQ2291420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dfb8f3ba969300c40e78608b681ac4ec7ed7ff7308e14910e423db421596f0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEQ2291423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f536388a74f40b54b537414f94f05c67c5c4b16da003d4c8546d9010720219. 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/QZMEQ2291424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84666ec7721c8d06a31c67254f9c06c822018700f2a14482513fa4cf1814ef82. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZMEQ2291425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584678154f456f90e19d2abb5c53133eecf0050976ab415f5ee3419d6aa7b985. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEQ2291428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ce4783706ac3af9142272a19e461f4c8ecb3407d238bfaebb7b1a44207fe31. 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/QZMEQ2291429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b1f868f508ef3e18278f25aaa46a75031a5fd423da583166eacf03867f69df. 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/QZMEQ2291431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab799cd89daf069d226b1ead9e706b5de800a1083f24581b22cfde4ab7a870d5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEQ2291432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19f6ff5f201b6b6a1c7c018e9e35549ae2341a7f35931253f25e905348574ba. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:40:30Z), 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/QZMEQ2291433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad66d657adffb56ac4990a74c72270a725a6bcb166dd566dc2b40e513985eba. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZMEQ2291436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce83d830271872a7f425b1f9f3b9c8e51cd78754c195c0fbe21124c36cda8567. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:43:40Z), 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/QZMEQ2291437.