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 0x23736725023d8c16609b4cc8f73a716ea51dfb480a7f8c59a612ca66b18ce799. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7e133c6-d8f5-4511-aff5-1ca4d43db50a.json and https://artists.proofprofile.net/proofs/artist/e7e133c6-d8f5-4511-aff5-1ca4d43db50a.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 0x926b4b9d845e4fbd2e8d038612702ae7473243c6fa280b9e0ebd95b457e5a852. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NL1AP1947841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5203a9999265c44299fae95630b18dfc92cad6946630f3be46c294ae9a474ed. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:47:13Z), 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/NL1AP1947842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ce9b0e2cb8786ff71bed334c0a5f1c62653fa399e6543c617ba8826611517f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:02:28Z), 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/NL1AP1947844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd203fd94f8104eddbb1146288c660ff6e2cb13cc32bb94a8404bfdce7cabbe38. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NL1AP1947846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b26b5ac4435036cbddb62474d05073841147f67da7eae4be10214d24a9aeba2. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:46:33Z), 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/FRPG51900250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7324886f59d8fa02bcf4a24fbd073d202d6d1be1c5500f23f6a26df95bdc0d09. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FRPG51900260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0289d11db8a573686947fd83679ff65c58eb55c9bc4e691fefa807925e55d451. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:40:18Z), 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/FRPG52000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b9bb1e0ac4673d4bcb4308d5b461a63d3e9b7ec17d957d1afa2e1beb5560a6. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FRPG52000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cef002b95a2bcbb760bb2c93b9453c7c57dc8c8a5b97d698436ddf92317231. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRPG52000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094820b464a2b6b6ae3b975d1542871f4ff5acad046d17c993b93cbe82ed751d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRPG52000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052cf5ff1d97e796aff27880db7b97c07b07b385cf8096b41fdbaaafe0bcb141. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:55:55Z), 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/FRPG52000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb94233732be049f6f30aeae1b55928193f5808e01e2044aba0599b779e15b24. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHNC2328343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86e16d82fc34fe66785300adaebb1a64674547ff4c2894cdca26e81d779e55b. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:02:50Z), 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/QZHNC2328345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42e2aea10e7a455ff7c836efe188fb258f86a6c979c239c7724d61e46289686. 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/QZHNC2328359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994b824ade4f250b136d67089238883164951122f957799d24402996f99bb5e8. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZHNC2328361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd6cc74dc20f05982d73c9f1c1f03dfe56fc38dd96e73c09e6a9e12c91006b9. 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/TCAHQ2378314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fb9eaf9269866d2aeb7667e7ef7a7dd2bee205ab96b133cb5205038adb3814. 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/TCAHQ2378321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661a49bb53bbc4acae5b2221663e40879a35928bdb6cb6d01f458fc38fa21af1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAHQ2378345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0166647e5e1c66305087a69df8e4f4fc1f3ce21f8077c5094edc09166ddf8367. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA42478412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bf0df03a038b9a001ac9101479abfbfa1df48d0294acad8329d0289202fc1e. 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/TCAIL2437294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21795f0419a8c9728e227c63b33560600b073de4459431027c4d80007127fb8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAIY2409621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb965ebf337222f0d59c8c005a9e2277c0811cfa353ed1ab8c62710160514a330. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJF2504895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc679a0f8799e98cba7e5496c5eb9bae86e0051cfe1abd23562d8d3287564f943. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJR2596879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311e46bd618c9e875aadfccb970d90e0ddd2dd190d988f676822056059148d24. 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/TCAJY2534499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c1679405e8d892af7eb048604351a941c5e89532a525c9ea67346002592eb5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT65X2524474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b662eaf1b01df723a6cf428755d07861a58adf99b93fe499eddda50f0ca201. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT65X2524501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa98306b09703d30b3db355e7991cbe224acae795f29982ad0ae611bbbd869f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT65X2524518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e3fcb85ba764a89760db5c9d788a6b0b360fa7469ee21acf86fd5f0b6f6d50. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT65X2524538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d073252fe08818bb5de2a10978fb219108ad5c1eeaf9e44557f130b4b514ff. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT65X2524586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa0b43145031c6f98f80fbccb3b9d52875e90f006a19aeb2eb75e98025a0d02. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:48:29Z), 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/QT65X2524621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812f2b013a588d1be7a5a140c95f208128eaf40430f9dd88911a0bbe73a9bdff. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:08:22Z), 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/QT65X2524667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418f5af8cc45a986e8b8094e088da19966495a740d869449cfdf73e6b04f68cf. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QT65X2524680.