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 0x47bd7c93f7aaacddede909ce37a2a288e2cd3a3194cee6c5d408fb6392fcc8d5. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3be7cb6f-9d6a-4654-96b4-dc55c35e09ed.json and https://artists.proofprofile.net/proofs/artist/3be7cb6f-9d6a-4654-96b4-dc55c35e09ed.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 0x9e9aec0659f7ccfb786e8bab71a6dd66b34f778748cb765b43a2e94efe68580f. 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/KRB922401101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51de71a29e3ac88d624c493505ef2af1332ef8441baffa6b4a6dff6c5af366c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/KRB922401102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833885aff9d00291ba9a27a9b5dd80ffd113fdd3675f122746815a63f8ec5900. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRB922401103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e04c43000164fcdb0289b0250da07aadb24592a01c8023a013ec5e3059b3f37. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/KRB922401104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4105634d721e6e59413e4f071d912e9e7429a358e594029e120807b490dc43. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/KRB922401105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e5c73b0d43267acc6dd0c01ffee5e3d45185744586ae97c8bdf5c4026dd531. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRB922401106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f3f6bca4fe78ddd45c9a49da780199f277d7399bc227eacb85e2d6456562ee. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/KRB922401107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b0fd2a80413e0d62bceeaaf7ba50174facb9365d88a0e2ba21b9a09949e57c. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/KRB922401108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e289cc4a5ae443e24a91dcddeb810d224ca93940f60bf08cc00d9c4a6e77a25. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/KRB922401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118ed94b9744d856936855eaee920dd1453ea1f21679f235f51c32c84e49d46b. 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/KRB922401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929d57761dabe992ca62865638e7969f1ffa8cb5bc245e945a75123b268c6a80. 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/KRB922401111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa592afaa68e359c827ec4997300b2c8927ae73ae48847b0f3330bb666ff16425. 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/KRB922401112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2977f405e54394d306df987a239c18dccbfcd85befbe60047df7247ac6fc7108. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/KRB922401113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f806a8cd02cb28f46cf3e529f617ad643be193cfbf3168d20313937afe3e45. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/KRB922401114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549d6ebc293e95949142014c60d3a625c3daf0b0592d2345470a32113e164e6d. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/KRB922401115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0eb4698655ab72ba89543d69decc180ef357915a620ed1bf3d394348c928e96. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRB922401116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fbb221c7aaefa4ca10e83f03257ea3e9a83cf9923b2ecf414e0b1a90987722. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/KRB922401117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea31e7c7f54f9f6102d6742d7bda6386a87fbf75f4fbd74a034e4e12952a94c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/KRB922303649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcd3b8454657cd9fa4240d103274ed565399a2f7af07f5593a2fef6c0f8842a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRB922303650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ede2bcee2916d8c31731ba65fce711d31f06a23d160c1570159c725e275642. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/KRB922303651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec48fab39850fb5e343825c311c0306e4926e07c8cfe376ee7a299a1e666c6f4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRB922303652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19495d9eadb37f18455e1107d2af772ea8b6fae04aab7781a1627d223f37afc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/KRB922303653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff65dfc727aafc467bdcdf6e5cec18158929dd5eccff124da5e41fc0756b3152. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/KRB922303654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd083304d2c05d8c6d17cc88a632a67539f69c0fa827378fffb8463ed840d45d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRB922303655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5ab1c01b23daba42e7bac2684ba1458e79b23d0ac5d7b3e9281983ea75ebeb. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/KRB922303656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90853a63b9bbebba21dcf98edab79cd121e5d1c8a9984fb116149b6b3af4596. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/KRB922303657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cb33372804f441f08729ff5e32096eae131d450e92872d4fe9445c54f5bf1a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/KRB922303658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c4504858ea9ba85c87c00bf7623ba546e8a5a22fc68a0923ecd65b8ae79ada. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRB922303659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e9956eef3048456f9af12ccd3d5a7a7b88c798c2078e69b9a85ce73dc0f65b. 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/KRB922303660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bb6245729b4e8b9382ac66b9398bc8af783278e77c65b2e28a5ae0aaf741c3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRB922303661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afd5f3f4aa2c19fa6160dae60f049955dee6278a370aedbee1ecd821edc893b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRB922303662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58252631a0f61afd4d332d9ddef24aa95ad3fb850eebf6e187cc546152178521. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRB922303663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa543cf4f2432f197dcc5f627a26f7f764cc54f2296c1d5452f1fb7102fc91610. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/KRB922303664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de4c1e7e104f3d9a90905049a0c61a0129ac5a906b37455c45946d24b70b821. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRB922303665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc462f4aeab4d6180dde3301fd7543506e2d028017ff0c45451966041cca12a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRB922303666.