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 0x2e29db80ac0badfba44d65a2eed916448b0a19557ef63fbd569704033f444d4e. 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/b555e648-a188-411f-b8b6-08cf10738bff.json and https://artists.proofprofile.net/proofs/artist/b555e648-a188-411f-b8b6-08cf10738bff.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 0xc57f813c332e8c06eb838c5f4b582de22facb5c0850ae707d6034d3a54eb9e3f. 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/FR96X1633392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7842d2db65db990fd1d50219d686b481b35f696a9fdf9f6e41a6537d47fb0148. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR96X1633394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf75c9f2f771ce508f2f6c2289e5ed1e17de08575ce4b1997c6da7175852689. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FR96X1633395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af67843dc02a9bd38308fb2623249a27d8d1465c42b0c1b3f58d1cdb7dbb696. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/FR96X1633396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a0c912414c7940ee2e441b1e68771ee2cb26a0141b01050b6339f539274c9b. 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/FR96X1633397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1fc02b8287e20769579b63ecede9aa50da976f4139b06951b388cbed116026. 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/FR96X1633400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2fdbe30db27af951c626593e027644df08cde6f49fb6dadf4afe75a793d282. 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/FR96X1633401.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfa3b9173de4251bd42581580f3514ccdaa05a10deb04d3abd20851c2de1b2c. 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/FR96X1633402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca21942ab8619ad44014a25ababb62ce0df30090eec8a463e09890c3e7d8723. 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/QZGWW1943004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9607ed94ae3dac8951b81168532d43915b6c2a532489dfc0cce874fde6e058cb. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZGWW1943005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6327e0174bf7ac7dac8f78414b3cdaa8ec2fb81bdc5d4c8410d7007140cbe21e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZGWW1943006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1c4f6002cbd6fe43399a1199cd91e8096a99e4b62fd8330958d96078477617. 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/QZGWW1943007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cc9f6fa0772694ab65c11fd3ff7b21f7f7bd61c06ed286bc87e82d66d8a949. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGWW1943008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893a9b74dca1c1cce5dbd4282856a06a08959559ecbccb50ee03af302e7c7d2b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZGWW1943009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca86dafbfbc62b35ae3fba0336d04d2738257bfc31c8557d32ae9f3821d48429. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZGWW1943010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93fcc62a18473831a977c0b660820a9be0ea556bd3f55f719e2290142b377ba. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZGWW1943011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4364ac1f6faead1e2c59fd4993af6d70287f8be34cb76393792de98947851f2f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZGWW1943012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d01ebd8fceb4a1220e8d8918597e77f8c3c22b88e6d30dc76aa5ccfd15800f. 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/QZGWW1943015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845f041c315f68b5bf5796273809eb4b00f6dfcc89ca7c0b1b3651dab7236f53. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZFZ22576659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76703b81a45f67520e8b21bbd9515083d15637f1267b887572f63d9cee403d98. 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/QZFZ32577887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e175de37b530c4f26e9d3dda05b71e7d63d22b943e97a4acf02768a4071f3a. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZFZ32577890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694c017eda353531312e0ad979d24929adad038471986397df96c0955492d506. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFE2559452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3504918783461062451e2ca2a054fc8c29361c015261f1a87e2e98a65c704257. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMBZ92317284.