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 0x9204acd6a319ee09fc304e4280a0ed0b0c869b0c9875ef6c00c12b2bc9e993ea. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1955a63a-5745-4c86-9459-10af26735d0c.json and https://artists.proofprofile.net/proofs/artist/1955a63a-5745-4c86-9459-10af26735d0c.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 0x21ba55b3ea5567d92e3046092a31fe38ebc5c1a5d4681281fe8d8e4dea2ba639. 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/USCGJ1223953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a9a8261c5ac4c1aad240eaff9e9bfc3b639c3392df953fa5200aa61e49e7ba. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGJ1223954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d2b1deb50382afae63c45b8030a680b383ba1fc01d3ce02ac0f01a1bf465a2. 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/USCGJ1223955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd133f2147bb9f2a7696dd5d193f510f310c6c1ca70158bcd51ad45cd072c43cb. 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/USCGJ1223956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d9bc1a716426a9c24b4737e4e0ec0040d1e2334000880d8aa228690e6b13b8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USCGJ1223957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ff68615a68132d18d82822ec7490210ac699c3ca9c0acd48616e35ddcaa57f. 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/USCGJ1223958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c04297d58ac7c261b0f8dc7cd8d4386a3a849f662586655c93641d9e2cafcdb. 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/USCGJ1223959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181efb29d310a12310858cd5aa58f4f9778abda6d5b91d07c996e60112ff24aa. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCGJ1223960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6313b412c87117a8594080fdba413adca0f6c3cb922be6e333e66336adc08fe8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USCGJ1223961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae10a268b2aa1ef8b78f1756f2e0ae969f8ee40d8f6e85f6ffc25bafd93733c9. 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/USCGJ1223962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e367f38250b199744e79368c9d26b065d829b4d65843f12158bb63245fcd06f. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/USCGJ1223963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be6c04655c5693f506fc3527dccfa8d97a18fb684ab0991526a946c4a61baa6. 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/USCGJ1223964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb5777ea8e751adb11d9298aa726e10749eef5ef93e29f50aab9bdcdaed11d2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USCGJ1223965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73adc500d50d6bd4308c06af40862ed5d9e1a1be8c606419d725da4ae3747f0. 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/USCGJ1223966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab775d7fa975b38d75dc9d07773789adb468bf2627942d195aa90671a920546d. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USCGJ1223967.
Duke of York's Troop (Favorite Troop) 1795
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d372be66a2cb92e5c8858a7115b93e80ab271f070c78e44745d2be06f50310. 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/USCGJ1223968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568a63a85a8688ebf4e8a623a662ca3fcd3b552783ea571be5f62abdd74155f5. 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/USCGJ1223969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf878b25a3b168df9184451cfbd4f6b3c894d930a4543d3ba03f417a6695200e8. 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/USCGJ1223970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42029c4e2e8a1d66701860c1722d88d0f6b70761e139b1d16b5a0d513a7553a1. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCGJ1223971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36948d3a5d33fefb77d3ae55ee494c34c8be52f4a6490d958f3dfdda22e7138d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USCGJ1223973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f8a0b1839a484d71ee1387ca7653e380df22c41dcd5f9f18068f830a501959. 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/USCGJ1223975.
The Skirmish (Incl. the White Cockade Ca. 1760 and Others)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f2237e5c622acbb46708d776afcbfb6ce5319235fb65abda6ea8509485828d. 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/USCGJ1223976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d9fe08b692da10c98ec9c1cd42ce05e3c8a42f34a64d927abba5f7c1578a6d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USCGJ1223977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb65a6530d2bacf43abdfacfa30742a7ebf4bdabefb28020a180e269f2d625f. 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/USCGJ1223978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212eb8aef5391099728e16e11359c525f5c27580ed2cfc4f4da667f4ade097fc. 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/USCGJ1223979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf070534b42818319cad89cd751316ad655ae21ea464d5d764489f43bcba2bea9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGJ1223982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202acee5c22a4f9a591db45e01c9e0d06f8941e466d6b824504ed8b0c9e559c7. 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/USCGJ1223983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fa5e35b2ce19cf77cc50defa395c25a24c412e70832c409efb7ad5691af4db. 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/USCGJ1223984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03841b8cf29d554deda50176e960186b3828288e8ed9c35783f27551dfe48a28. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USCGJ1223985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130cfe7dcea51817a117ec5fd3209738bdcfdb2b748ec8b1160725d1132d5066. 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/USCGJ1223986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedde341d85fade41b7bb3f0ed5c389c8a218d8d4071168b950ee2ffd8cc7b89a. 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/USCGJ1223987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c935fb944d176b7faa0e5a568b171b8107ea6944df8c030115e99f681f22f91. 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/USCGJ1223988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00996a9a4ef62c65e7410a2cc852b22828591b2333d0aa2dffdbb7cab9f0331. 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/USCGJ1223989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc094d5c5347e03f0d7345d2f1f64d1f0632ed48d64f5e3ea40f5cde5808f94. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCGJ1223990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708c6a2f0337f5b62057dd52f3eae751201aa55f027b3a35dd945439bf49da4e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USCGJ1223991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9141a642043f757887f3f1bde7f452c558bb5dd9db4eaea7bdf19d5fee998d2. 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/USCGJ1223994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69580986279070b610d3ac6225f130c8c308b5fbff02941c80c578788be4851. 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/USCGJ1223996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2ad0c2cb57148c0244f6af5a11db7a1f81dcf738eb2f70732c3c27318bf7a5. 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/USCGJ1223997.
St. Patrick's Day in the Morning Ca. 1745
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396a72b43617934c4b1256ca97ac01a5d88f40feabe5660ab67d4128fa743b45. 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/USCGJ1223998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254c15b61247f496bb0779df6a8e32944f4e3343467168220eea14f08f5f4c9c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USCGJ1223999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2075a9b9b853965a9f1d0724663835c7516cc8748edef2e24ba429ece063a6ca. 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/USCGJ1224000.