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 0xf1081a5e3749850fb6d2d0efe70ed7c1ef4e8f1374efc106b60054961b026abb. 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/2fc7cd0a-e8ec-447e-98a4-a8fb132e74b0.json and https://artists.proofprofile.net/proofs/artist/2fc7cd0a-e8ec-447e-98a4-a8fb132e74b0.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 0x82cf8dce6a180b88fc644babb8f1b6f3f024770ebda161a4d5fd2b81d6be5235. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:45:31Z), 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/USHM81336865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2617e2f14c561ea3cbbcba9fff9f601b1110f15781e32746e1ed51d0bf4985c4. 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/USHM21421866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d3d87241d8684a11164883076a8c9d92680d087ffaf71e5c29c2cd9abe17eb. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USHM91306061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4f14a23c33936cd69c2473047e441e8846ad362d3b90a5227f4131cfcf374b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USX9P1322169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaa9042b6403814d7490011147acb245bee3b39a07747b77c1feec929be334a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USX9P1322174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9264a0b6abb32c5a43291fa1445f801c2fff9897fead5079755bbebee3296c62. 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/USHM81434633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d41c2c0c7270e2cefc48e7d6a248f79bdf9b4a14a262bccf264ffc448bb7a7. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:55:19Z), 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/USHM81434637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7707159b00d661b135bd502ef531ab2f3ded4ab1d8dfaf25f6b6401517a6aaca. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:59Z), 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/USHM81434641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68f0f7de3ef3e0e792e3f6229d7bfc0d722d8d7591473c4ece026020dddea27. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM81434642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fbecab3dcca18ff6e856c7ddbaf6a897a272cc4e7eac78197954909a595f38. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM81434644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691d1be2c63273ba052d971d92e7b37e816f3514ea9f5a7419aeee3739184eb3. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:47:07Z), 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/USCGH1525036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eecf59f742aefe4e83a1249da81ef8aaf8e5f442556334acfb6def0dbb88f7a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:36:56Z), 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/USCGH1525037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80545d405477f914610322f413aa8126ca47a1710287d2c7bae921e1a33d186d. 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/USCGH1592706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1d5d7154c1ea19b1956c7d7229c6fcacda31417500469f86c3fd9495160eac. 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/USCGH1592707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29250d65c69acecf0f42ba154e8d58fb23ada3ec6de718b763ad135754136e56. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH1592712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0b3016b2963dd46ee8ae7c4b5e1fcfc4caf91c98da31413fe46119c7f9ed5f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USCGH1592715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4687c07685092b3508119086c3369edbec0a0c382a309dc66c28d8fbb9787bac. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:16:35Z), 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/USHM81556691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388bfe3aa6042121f68c1e08909d3f399525b0cb94c902cab5c099000c1d715a. 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/USHM91632368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1163ea01e9617c509a8ce1607b1835cc0ae9b444014f08e37afd4a1378ab24. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USCGJ1798079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0040c768c41c14d9a5a776ea3d76a4547c767b1d1f8500ed8b91e6ba68c4ba7b. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/USCGJ1798083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2460de020a740f7f3b7cdb6c7d1a61c2a269cd631ab5d959313c06e85ee5b5f0. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USHM81855523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2034b6a68eed4fb0b7b2fc65d2d7000d021418ec303b556b929608ba1b86f23f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM81855530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb006b94e9926f9ced6dbea5c43acb930ac5762ea6a6830f5f9e78f6d187ba49. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:47:39Z), 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/USHM81855531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3f0e55c3947aed035f941c5a0226e6d3b6663dcfa84e0348e398fd0bfdf127. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM81855535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f0737dc1224f834090f880c072ead37898200c22f5a6767f0f6a4a8532ee71. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USHM82067426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6224f7add95e49d41b9c86ad71b634f05249bf2b8b2d74519e6d71a3376157cc. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:23:45Z), 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/USHM82067427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490ad34138eba909c1c25ce6880d8e4aece3dfc5ab6b8ea818aa8d99102a842b. 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/USHM82067431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd41347d830e7f4ca562923e3db58b204f56f8957f352089c3ecca276d2362f1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:42:20Z), 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/USHM82067436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a943dea197bd816726f724e813a9a0a458263d220e50b96b570c47080cf711. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USDY42496248.