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 0xf75dcbf76c912b595238014ab26547a27e5bd715888a12a880199968225fe506. 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/f135cd80-2964-4938-893e-672802594936.json and https://artists.proofprofile.net/proofs/artist/f135cd80-2964-4938-893e-672802594936.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 0xfd8d7419063bb9be9a8579ffda03bff97d07ab85add205bb63bf41e81dc901f0. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZHNB1913255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06c6eac14576a9a7b63c3abb00a9fb0ec37fbed68ab6026f1a075fb7c474aa7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USUYG1398563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7a90ff545c322e56b2763cfda42f842563f24c76dd6d29ad20987b6ca901c0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USUYG1398658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c854a4202dd9297abc8b70d46d02d8861229f96882505da9fa02e6e310c0654. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:44:28Z), 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/QMBZ92259423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11ab43c188b0e46bfc1494aaa7d7e9162760f02765a7a33f941fc13a193b1a2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZW9L2278063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e870c722590848c93ee46547c76573cd3a9e462086894ed1f5239986e9e8e0. 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/QZW9L2278064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe41c5f94e7047a227d8d7c16a96714360696fe022c87192fcf872f0b2cefc06. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNW72250487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d3278e2ee440248e0da68d2c5821a96dd831ebdea8cb98f0e4145cea611815. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:53:14Z), 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/QZSYP2346582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ae72a4be927d4c3b2e5ce90397bfcaed238231a3a3a27da705082791a26219. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTLA2412849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d3278e2ee440248e0da68d2c5821a96dd831ebdea8cb98f0e4145cea611815. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZSYP2346582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c15ee150754772f105557cc658eb738d9437c6ca407637b3aced5ff18ba8e71. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZTLA2421106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364861d9b18069de3fc1705db13dca47ee679660cfa277bb61f0412cdd6b2631. 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/QZTLA2420243.