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 0xc642ae40ac4c29e2da54bd6e1f1cf3f52943b1091e52b0b316b1ad9a42fc4944. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53384bad-438b-4b0d-af8a-7ed722dca4e4.json and https://artists.proofprofile.net/proofs/artist/53384bad-438b-4b0d-af8a-7ed722dca4e4.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 0x644ab5a3b8c7c7e818dbd8bfd71ee407d2952245a7cf27ce82d77801aaa05571. 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/UKQJK2200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303846212bb17ba3f2b00401b99cc3cba1477c1a7d4d0ca6b3bb122325051100. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UKQJK2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5a3f468da528854a95954a15b5a61316ddf2e03b8d9d90097c5fa682658752. 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/UKQJK2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190ff4404ecd8ac85998f568560a950417947af5ca2c0a591119bf69f0ae49d7. 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/UKQJK1800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544d14ab7742282a379b30836d554c5b5fc1e2696b92dfb81bb93323c3e84c6c. 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/UKQJK2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a9333c037df3dc12e0f42425985f55c675f85b058cc5f6c7236b8864be33d4. 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/USCGJ2037246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cecc017e96a18eb2249dd1b46a0e29f9555257db7df779c51c58a0c24c0cf06. 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/DGA0P2473125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5248a157f4226a46ce010f43d35f9c8507bdec3e09b860ba6ad4cf2b45bb366. 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/UKQJK2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17046d44a119932a279a7c7525d2fbb3221ce76a63e99d2f56cbc2176e4fc730. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/UKQJK2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01a78dae15c647b128d3360d0d64d2080e03f91ff76fef3e134f03c0167a8ed. 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/UKQJK2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf5ee1145c07e02384974f8ea50abfdf61c0f1a07a6d05bf9b5ec4ebbe49b51. 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/UKQJK2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7959a11b04f2aded36747a71070baeb203359dfaf00645fe0fba4ce9672e36cd. 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/UKQJK2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabced5c0c24c70d29b38c373c4b2fdc5492917af82d394c004260fd86d589ce. 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/UKQJK2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52465790f21c423a4fd2a6a6d4de4fcab19f128a8745b6cbd8367aa4c63b5f66. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/UKQJK2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fc3d83dfcc5f31c3f45baf007acde367fffac9c5db5f294b1a3b485d9e93aa. 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/UKQJK2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07374fb439481a217cc90c3d2c085ee34e2f93b1826bb9b59a7e8880de6e8ec. 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/UKQJK2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d4f2340ef61998d5584c3d9c00ccb2296269c2c2d4317aabeb69087d49f060. 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/UKQJK2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa966c0a8cebb2072d4c9bf7bf428cd790491e44490e55d206c0fc2ffd6716e28. 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/UKQJK2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8908433728732173208aedb5ea0058588dce67ff4a4c8f6c99ac9d1c9f08f44e. 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/UKQJK2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6acb019949c51efbfc680beb911938f9fafd002bbc1c8f23a0a6fbf771305c2. 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/USL4R2024220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f93f4d6becc6e9f0f6f8b42f6a4f996c2c88eca47c91c05fe97386541ff649. 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/USHM22053494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5f79a1800e0d25ada73d5a5abce2779d1301f9664905d617fd9cd8c5f8f48c. 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/USCGH2079163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500ac765136527b5bef8fd60b055babb87c534c35e0f36acea1b8b69d395e076. 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/CANQZ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367df3cd93c3850e8d2103fada881a352b879ed8f1d80d6c493b01906cad2b47. 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/CANQZ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26635723b6be2e4b1c9df699a6441d49871dfe8a899d11772e2379adfc4f7335. 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/CANQZ2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9468f415a13dc204f3a6965de05f5125043efe7a8e3f07b1e40321133ea259e. 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/CANQZ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb796d9590c1139528e484b6d293b2977544592effffe0791ffb0d3a8e6c3f697. 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/CANQZ2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579e2e904c4e542822202322d46d3e6f9d8c4f2f640a577b91b6b19ee5c130f1. 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/CANQZ2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dc9cd7871d53044dd0d506fa0d47d1fff10bfc324011f258482ae9d83d4323. 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/CANQZ2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d09191e33b77ad014369eb5863f733b1358f0f98d9d2aac081f6222616a98bc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CANQZ2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf627c08ea5f3b6d400bec99d3078bc0133da78b6f878f217261a40f06bb62098. 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/CANQZ2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d44221306ef15d98c4f99ad897c2d145932cdf1b84ac230f4126cf3563cd782. 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/UKQJK2111402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec461411225761ef0103e228e73121749406b200d9eb8289062e36d2442e3ad. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZQ4X2200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6196458edb6377b46425f4d5ef82ea08d5aab0b6a295a5029b1803dc682d95b. 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/QZQ4X2200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f9da017ed71b0f5397967980aaade2c26e0682c783f15454d04120f180d249. 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/QZQ4X2200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735fd7f34e1d1e23cd8259a3692911d534f6a5240f8953787fa4621e6a5ce3df. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZQ4X2200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4211e872b9676b44b9a9d5cc76813193883cdba91657d386f6bc60693f2533af. 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/QZQ4X2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb045a8ee9420911779741c7368b7105ac9320c82007841c6ca21bb3429385f61. 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/QZQ4X2200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795ec45639e1b0ebb017c39a6648d975a67b8d22a8fc725a9cdec0237027bb8b. 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/QZQ4X2200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61174881455ed46427503d0531770084573fe8c0b305168aaceda1e68e4e0208. 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/TCAFC2059899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367df3cd93c3850e8d2103fada881a352b879ed8f1d80d6c493b01906cad2b47. 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/CANQZ2100002.