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 0xc26fed4ef565b4b6746d4f940b17871cdf4472fdcfabdb442f4763d743d9fca6. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbc755b9-5853-4666-b889-a1c980c70536.json and https://artists.proofprofile.net/proofs/artist/dbc755b9-5853-4666-b889-a1c980c70536.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 0x9e96083de2fdeff94c22b358f98a2a3258fec897ee1b9d6064ef2585d90a396f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZNWY2357563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61d186066a27dd416d19e3afbb8e406356ad1f55a6af5a4f8cf6e50c1fe3223. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZNWY2357565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cd02c6328bdbd3e67d5d4ee919b3d7484d06e69539007be9c64b1963236fc1. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZNWY2357566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829785a89867fcff9a4f76bde3d819648715a4444981761b36123ae15138020b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNWY2357567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9c7cfaa1c9482217311b0e675a3d201a1369afd87b0bc5836f9f8a05840dff. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYY2462738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921c06f1c65ce9cb94812700d9b3c4d8f424d89f640994c347654030b85eaed0. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZFYZ2469083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8970ce7774a153a2fa6f343d762f719c276d5248bee1f8d0d22f1ac260abe86. 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/QZNWY2439470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dca3971ca898542ba639a7c239f7ed96480a9503d3520eea8ed679b5671232. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZES72534560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63af881c619f997c43ed25435c071c794efdeb0adf79622a7c9271c0e99d54e. 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/QZHN62585434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f166172a5788990f698b076ca6f80de830f723e71ef125c5615cc7ff62ad8f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHN62585435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44138f6f525381e39ad58ee47f609aa462e9a2fad7b3dc4ca7c0f11ab404735. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN62585436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ddf0d1020353462782b373e71d3ceeb71ea588aa536a5ca7248aef3e9a9887. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN62585437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d3eb8c2748884e3966ec20156860bf47a57fe384130bd8eb541b7342293790. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZHN62585439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9b827cee63029ea4fc92b10e3c905ccca1d4a74d6255fff74836a72990beee. 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/QZHN62585440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae45fc5ac6cbe04cb597fac7a0910c61512fb9c8547afb7e575ecc5eadd7d842. 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/QZHN62585441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8190ab1ce95a995f5cd15a4687b2da22d7740394e024b7afbb6e923af40c2cb1. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHN62585442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1843b64a6f39ad14789e84d6367328af2a033efd036a69badec61731c46c4cb3. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZHN62585443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c195e28ee6b174bbda1425473f7594c372366c55fb3884d488d14a473948031. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZHN62585444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d3e753dc711914f8b42094fa3cc0ffa0175706bbba82660708d9461dd6b719. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2220245.