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 0xd5a6c0c8532195484a8f2c5ac90a2cd31cc4c5439aa2170f630668edee767f49. 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/bf04fabe-4199-4a59-b485-bb55931f1268.json and https://artists.proofprofile.net/proofs/artist/bf04fabe-4199-4a59-b485-bb55931f1268.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 0x2b75006c9ce1f817467a831ddbe59c57647ee22062abe5c0b3315e95a4e215ec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6Q2116475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9142c3fa1c064d894e34a496c5ae1e24a8769ad04f93b0ffbdae6b2eb59f03. 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/QZK6Q2116476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fed0cc4cc1e88a4e361b4a8d063dd5ae867fa3424be8c529d5dc43ca7a955bb. 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/QZK6Q2116477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c43837ba523316de1e3338da1f66e9f0621b7c769ae0d1ac6e9a5829f98f788. 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/QZK6Q2116478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642a7b94261023f809d3d8e6dca9b80a724c8e086203a6b9cea58f87c17ea9d4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6Q2116481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eea1172abcccb59378801c1c2b26bc38b616dd05c82fa3d1fda87cd6400484. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZK6Q2116474.
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 0x05d851b3ac0c90245aef9ce1dcde03a3a408de9a6b31c4c04a7734ebecb31037. 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/QZK6Q2116479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359741b937de349a9a09dc2466387734c5dbec1fa2848315a6e81eb56d9202bb. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZK6Q2116480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6d3f12a19cbbd01bc371df88edbb399dfb30f12f1b389d8b5d079680c604d9. 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/QZK6Q2116482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1c3a4bcae8e315d7da3bf0e6d60ed7aabd3636275406d57451d263fc1e1577. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZK6Q2116483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bab00edc92fc382dbe410a1b101c22d456c22466484927c0910d1928ae3b2ca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLZJ1256418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9345af2f03876a6033f32b99b4c5bfd2aebbdde1be2d4e1d506be90a2a99457. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLZJ1256420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f78907d42234601a1b979221a8dbbb759c94b16a8a496e76ca7ea87041ed5b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLZJ1256421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519bf758da09c95a4f013c6078121d5bbf10e8dc142604288d5d04892aada3aa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES62410316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129dfc2d2e270f3976ad2cda6f3460c30cd0a7e1e4814aabf057ebb3546a4ce8. 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/QZES62410317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e313d75ce188da2baf75cdb09a9b5282bcfedeaad327304f89a46b60f32e522. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2235777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1761a55779cd25a28f4d9edf547c76da580c7f04b62f85a2cac637d0c83008f8. 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/GBKQU2235778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa24a31085e4fa8cefc591676619e86fe8b2f246a3ef35d54087ad6daaea2879. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2235779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fde52e40300a85292d8a04320a257686ce775b158b42eae8cb38b3764c10377. 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/GBKQU2235780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fcde5e1c20e668c153df81b9b97c5f53fb0ed67abb6253aa615918d96efce1. 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/CA5KR2010081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd817605ceb83b6ab5e7b6342b02040d50a841b8cad6ae5f65366736ae5861d21. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYW1937207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bed090be8772ca3bfbf1c72d1066c2ef548bab0a8fbd79ee911e209ac093462. 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/QZES71904436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b175861caffa1813dbc0ab1f8122ba788129853581f94fdb9942542145824a. 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/QZDA51953956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5889c6867be92b5e75f062a37111bab1bec51d323d933534afa2ecdf7439e8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA51953958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab41ea4fb5378fed60e75b2a8fc2367ea8cb94545f36458dab0dfee4bfd1185. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZDA51953957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750f7d78cea413b897a8e28ddc122da0dce404de5ed0c14d8eba8e6d7df24779. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ8LD1999539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac86ae22bca71392646e464429cd31e86b62fe5f9e26bcfe70d915a64d719e56. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ8LD1998908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7036bba3e0497fdb8f837369ffa1f267cf6fa3e2b47c59c85d9e5efbab948b8. 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/QZDA51922129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e92ca2725b67e8480e99b0751b85d728527c5b28d2c265eaf7f5596be8bf1c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA51921286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6749c1b6ae5f389d5b93233a657ad163529e1e6169babd61ef18f2d597dabaa2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA51921284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6212c940bde1e021c1f7babc619cbca95a310711e0a1c8ac467339a269d90cc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA51921285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ca748b5754eebcf4ca1b43af51f41d68209515167c5adc088b7a8cd624e23e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZDA51921281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b622f081df8f177287885388d787976de3b163dacef4cb6cab019358476d9a3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZDA51921282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef473a6410f8d760e76fa54a686eddb2d459acb5f6eec5e7f3013cbc59d82ed0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZDA51921283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dc6269e0e6e02dd44f6cdebda8ea9c749e6e0a435ab68377ad27f5f36c3fa6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USQY51493108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99ec4afdb70f4564678524e17374a01b9c231a2727be90e890546ce155df7fa. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USQY51493107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0907a98d8afc4fcb233a082130fda44ca45f8a630ca26e6d2039628403e0e66. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USQY51493109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb4b12b630e964262d287d851c2dbddbf4188edafd20362afc765984ee73e62. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA2P1634608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639319aa3ce4c2d0c9b9068ea6a5b23b0455db8060c24a02c225c9e8c2eeb614. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US3GD3515417.