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 0x773ca8f72a9ca082b5ac911edc8a419e64ec70a72db91fd1014e46f243711c33. 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/dc49ff9e-d0e8-499c-8f9b-41f56883758b.json and https://artists.proofprofile.net/proofs/artist/dc49ff9e-d0e8-499c-8f9b-41f56883758b.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 0xc0c0f642c1868aaf117fbf92dca337570e4df663a6907f21ad254c6b6b877650. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:41:27Z), 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/QZK6Q2403196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a040bd1fb6c7b1b7f67d93a34581f8f2adc27c7d7264c3f1b08b74fae85aea. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6P2406199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a19668643e796ba01f872186f2efb173534c5c203455ac352b3eef26b35295. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:34:25Z), 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/QZK6P2499837.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c0f642c1868aaf117fbf92dca337570e4df663a6907f21ad254c6b6b877650. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6Q2403196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9a8d419a593cff6dd1fb60514a4b1bc47582e8e51980ba079a32eb2f73fbc3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHNC2460401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93377bfb393e72ff860c4cb32c0ee79e8ce26aed7e443f796e16b7e73eb5edf6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:56:15Z), 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/QZK6N2463789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9f0b09f2b289b7c05a061785b40fbc9c83c0a2176b86c3cbf3483d16db11e9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZK6N2463791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb0cae344c209383815d62375709670bdee991b145b0020102b327a536330ba. 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/QZK6N2463792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a040bd1fb6c7b1b7f67d93a34581f8f2adc27c7d7264c3f1b08b74fae85aea. 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/QZK6P2406199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18acf13450e63f31367d60f55976c39ee24b6a973bfb9583670d8c8a039290e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZK6N2463793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4710e7fc4050859192fd2240ed0173a15c5a628386b97fd99a9ac4043dfe15f. 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/QZK6N2463794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c371424eaadbb0193a29eb4b6520b689f659d53d6945a53acfb913be2aa6c3. 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/QZK6N2463795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a19668643e796ba01f872186f2efb173534c5c203455ac352b3eef26b35295. 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/QZK6P2499837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c5efaffbff1048bf8aa532c52df88bc39510e8653200ab40060e154972b7f4. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZK6P2498307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc4697994e99178e2c48ba69c236b72f37b184d57efbe9f3cc093c98779b7a1. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:35:34Z), 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/QZK6L2432822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39bd1758efc09258d1dba8ad616ef928653b6e0e657874407319415f12ec164. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:11:15Z), 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/QZK6H2416455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd040854c116fe66570a1ddb698f3e521fe22b67b985eb4e1f4349a21be1923e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:29:14Z), 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/QZRP42475354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85f520c26c591be150ade6cf7d8ee3a74d53157be43e40e694df63892253847. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZRP42474459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13290b0828f1b7123fe29fb55bfe99d4e8696b9ed4b47bb71079ffa90c91c5c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:57:45Z), 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/QZTAY2412676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5274b550a5e7f515d8ea9d15c9b0037e1215d05d5886ccdaf332e327fb1f507. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:30:25Z), 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/QZZ7U2444552.