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 0xcea5046dec6ad17cd978a3a33e458e14cd21b9e74a4f020435d7d6f0bd6edd70. 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/0a88ac78-162c-4333-a442-228b8f307420.json and https://artists.proofprofile.net/proofs/artist/0a88ac78-162c-4333-a442-228b8f307420.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 0x1c5ac3540141b5c4225f4a890bf9dafc8c8ca3cbffdbef4ad74b1fd53f4dad7d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CA5KR2481002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff98d9e0d0b10d2d3dcdd16cc289731d3483110e6f12c70c7f62eb9280e257a. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/CA5KR2481003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9433ce94926b115fd2dc46cafcfc3c7a6e8ff14b9d3e02afb4c6ff04ac2ba24f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/CA5KR2481006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0558313351a20b444c8ea53e215947f66d64d3f28883e0f8a5c9c8621a3ed20. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/CA5KR2481007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eadd5c40a450fde89212193dff5ddb4aeb499f9e03904a21a6b8bc01e47219f. 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/CA5KR2481008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa678c13dc27248e183f2b60df3ecd3a9404508826627dc29005c8e387eec1dd4. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CA5KR2481009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e7dc9c477136bb623143bc16dba05d682435487f8f1b694fb362ee1b9d0fd6. 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/CA5KR2481010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b52037aa0246b776430fe5f366e08db84d5c03bc0544bf9b6991099432565f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MXA3V2400562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa626435663651bbbacae5cd07a82e89467974b4e5a22b1952c3a53b481b54ad7. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/MXA3V2400311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48534af2bc6255970df4bcc6ee0a53c7d1bf832aed5c9f2774e7f3e04c4b8956. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/MXA3V2400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5646fcc1f7c83ca02a9901d2a42f27681280914c436c0f5dffca69b3df936e43. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/MXA3V2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e984122fde744e40da5dc4b41b300051d08a207d00e39d2870f9b92d475d3e1. 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/MXA3V2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521a3c46dae4b57b3e64580bd16052cd2f50caadfda32322def2f0d72cced98c. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/MXA3V2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f0142b69ea04a0c9b7aae3b4005b6879bf9e200755c3cc91749c0b4e96be71. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/MXA3V2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe85ca22656bf0a2b8dc2be4ac0e222df857ed3451013521c22fca78fab83c9. 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/MXA3V2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c5f0d22f8c7eb5b26d87f5799d33232162b9a83a125975839a09a876a4abf6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/MXA3V2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466929ccb735fea53d7311f5bfc28bc4260c1bde3326803658a5f8591f0f80a3. 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/MXA3V2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a495cf0cc6b3e5bab0688f9b6e8cd83f39fbeb78b8b39d0b9d1ecd33878c54. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/MXA3V2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ee367f144e11030ebc9f5a4a8ae6653b75f5aa8bdee6c7956f2dca93b8121f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/MXA3V2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef6efd7ce76d22014a41bf87fa7fa97b552306239ec3419f4f83178565f43df. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/MXA3V2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce5c6028beb57cfcab5777ba9c34090f38fdfc84ce4a723baff4df40d923145. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/MXA3V2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39279e69a9de8a84da0e2738c8269a62c636335c0fc96eb873906dea3bf3b7dd. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/MXA3V2400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf290408b43d30a96084b782ef3be36042fd518a61364dee95b658f90defa49e2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/MXA3V2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaec633e9d28646596cf8e5bcb8b7760c881e796731d71fd4864ca03e09c32c9. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/MXA3V2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29fa9477dd1feccc2d42fb2aa07e45959d5fef8e33e5a5a297a16638525b01d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/MXA3V2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f2ca3b6be6c4df29fb5fb2bcbe78ea59d6f3a6515a0ec10a22792bbb60930b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/MXA3V2400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1242082e9aac5f7ed5f7ed3d0ab09ca1fc9ea2dd7af9b9a3c588080893d649. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/MXA3V2400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d67c59a5197b666862c82f1092334eb67284d305fb011b7d411e3df41c04c3c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MXA3V2400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3757d2eb5ea67985ce690786d0a43458a22cfe5d103bb29a26692c95c5634e94. 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/MXA3V2400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5046103470c58b645cade2b331b77dfabc56b61855b867d18d0c5b2c3f25fd9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/MXA3V2400286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88150b86b9cc0d7e7a8e08925dddcc9bec27b2ae35d89277259e8ad47e14ded1. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/MXA3V2400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47820856b8bc43e347e5a5ab7551ed96681c145ec3a973c84adbcc0c08ef6be7. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/MXA3V2400272.