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 0x93d98026e1c14c474ac7e3eab31ab40948fee158c6187326e6a222d8a235d042. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42833bf5-b179-4c95-bc6a-b8ce8ca4f756.json and https://artists.proofprofile.net/proofs/artist/42833bf5-b179-4c95-bc6a-b8ce8ca4f756.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 0xf07bce65f60acc1155e910ba00d1195df6d45eee63c31abfeaa385b1a1c1fcd8. 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/QZNWZ2535663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24983da6e6dbb925f1c00ea95c05bd4d1a673a8cccd03be2c791b2f6756656df. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZNWZ2537440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77194eaf9c29b02938db8d9edd22d8a95a9ce6e2658668055e8c559ca97eee0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNWZ2537441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9926b2a77f900d6ac1489ea6e847d2f23d9d9f8a079a069ac40c56bec05c0e0. 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/QZNWZ2537427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809192c0db33218e61b9b0e3163f121fc4ca57c7e2d197cc479096c09585a8c2. 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/QZNWZ2537439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb9d23be06785b00ebc9467d24bd3b634778026e208dd71ad6d557eaff1d3f0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZNWZ2561271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde81d18a1b2c25dd940f2bee1e6cd6b1392f74cd9c641539e45f36af29b38b8c. 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/QZNWZ2572817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f89463b92a88d71bb9c46e31b040ddbdcb903b9c7f1908ffa83f0abc113f69. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZNWZ2561297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891f327663abae8042e22ba77d1332a9502d58bcdeb67ec0c001e262bcad0b5e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWZ2557868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd104385429928221a0aa76b1e9f8dab5cd16a54708c4c0ce79c8892c710d1901. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZNWZ2561277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675f92a0799a25659d31e0048b5890ecaee13fa18822fa9c2df3a8973b22ff95. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWY2594364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a3e97cacf3a1693ce06ccf64cf0e8ceb979e0560e17394e4910fa4de46ffa9. 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/QZNWZ2517455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910253d7cf6fcd1dec4117cf4254601ec0efee05a6116d140184907a5530582. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZNWY2594361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bf8783f0de87859e7570911be7661a9a9d132186dc0721e1af928faa5b304d. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZNWZ2519449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bba2061be97c52e30fa67ee96d8faaf8be69f1fa48d844120d42976eaba06a. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZNWZ2519379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5509305c595a63991f88ae7480de85cc7d1de9565c01d491ad1cd3a5874680. 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/QZWFG2501366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f86a62f5e1084afdaca31d7a753827b8eaebeacf861bd9226c68d98cec457a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZWFG2501373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bf635e09daff3208f68704e3a10960fe285edfbf792cb2a8ae5112dbdd8f21. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFG2503726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280695ebf826bd7ca818ad9228caefcdb98b92c565c032970c7225d686effb82. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFG2506005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66743c9bd559e66535f190dc06fb8d48d640aa567ab264fc0a4c28fe141903ee. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFG2501365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e823206ec46de8068f936aa0b697db54e8bf50f7bbd35766cc739dd264bfd11. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFG2501355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad60f594808fca1f3b6d8015bfdfae49c4506c9a5caa33736c4cd84f738d568. 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/QZWFG2501357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e8258a340ae66ef592a3b07d84584e8932c05555a795508318424937ea00b4. 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/QZWFG2505993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef20475cbfba0ae4ec40c45e2b7f87cb355f6ed5116a1c761e47c89a49d68ff. 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/QZWFG2501319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32ef5b16e033815ddb7d7a190544a29d8c2be112ccb4a3ea4819e9f6c0b1ab1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFG2503680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b9dde24ea02e0fe20925e67d6343048718b0c45616214c14114cee862bbafb. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZWFG2501362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e78a2c38caca217b990062dbd613f18fd4ba33e42c5345d040a0157ac8c25db. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QT3F52518573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134c5e70f19864db4005b74019f0f79472a9b63bf166763aabe1721a362bd6af. 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/QT3F52518532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805d76897aaa06e138619ed699535eb50586ed1b2d32a13b6411fc39a1d98828. 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/QT3F52518555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dcadadeacbc2623aac48d1dfa0ac1644b546fc43756a6eaf8e6ae485a2e956. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QT3F52518535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc313ed5fd67b30f081f64d20d3642a878d4ca86c9053eebcbbb6b1fdf285c4b6. 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/QT3F52518558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432d9c4219140cfa388e55eaa4009c4984966a4d5963994ecfc8dbe843c03ab1. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QT3F52521091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9854f7e6c8da593444f289b16e9f5d288c7a6d95c064f5f267d34f1adbe2136. 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/QT3F52518705.