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 0xf2575cb780cd61f3f0d528355362ea1313bc8b6e1723d34c36192ccc986f8ae5. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a8b893f-37f9-4ae5-9c7b-06be62cd4055.json and https://artists.proofprofile.net/proofs/artist/5a8b893f-37f9-4ae5-9c7b-06be62cd4055.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 0x796f977f3a8cc556536632613b33c0cfe3a898e1b03eb43be35b27a9cc66afb9. 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/NONIX2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0002fa69be2c43184edb7bb501f842f9f6d5c34c26b3a611105df1f3d14ca92f. 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/NONIX2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f586539845ed0d212a1732f69893053310ebf4c80ff258c6818bdb8ecb869b. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/NONIX2301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79cd74dfbc690de4e5dbf1d8999684feef692ac5498cbb1b79c1666eb37abe6. 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/NONIX2301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277ad8161e271a0cbdc8b424b095c90deca12d68b0d11cab51d2dbe06dc40325. 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/NONIX2301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dccc38aa5801bbda721e5b901914ab9b3f546c9968cf852abc3b22001c2625. 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/NONIX2301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf34d6bcd706b4d7cff57ebc69cac0b87c66b67f35e273f6c3e644bf59e1b12. 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/NONIX2301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7dfaae4b1d69af506a75d3cde5983be5255882ff842a55b682ea5d7a0bc10f. 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/NONIX2301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfef9c81e00a110bd14eb5c5f66f45c790fbfa3f65d70434adf9a9eea7ea8bd. 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/NONIX2301090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94c9f1053005ceeb0164f93501f25a35012e21c6ae7daf8cd0d5302d8e29d31. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NONIX2301100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80f12eb6e91b6ec5f5d95eb03edaba48977555ef755a664660bcb7eeddad581. 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/NONIX2301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185ffbe6f586073b143dbef332a57b26059c809db5931c99f141410b9b38902a. 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/NONIX2301120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546ba78778152875e06c35356103d94cf9bbdc8357ad43d3ee4166e18f309346. 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/NONIX2301130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fed8e84c5602f926f57c7d3b53d7080db4625bc3e4053b00e7b91e96e17006. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NONIX2212010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda332147f397019549994ca74ca06f4e74dc8f79ae108196810035749eebd8bb. 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/IL4632205937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d75b2428e28687a6dcb4e12efa62de6fbc346c3565e5bb2f4cb229eb16530c6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/IL4632205938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bbdf22d1c2f9d9d8cbc9633b1f3152f724738ca66effd2b3a87b57fb41d2ee. 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/USHM91820257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7324fedd544bab5d518351c562fd5562edde411b0fe8bc57c7a840827bc12685. 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/USHM91820258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410642c069e68413f318c813b94f27d600b788e40f47df312cdfd1307f78bac1. 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/USHM91820259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105cc0e336a2c31659dd0278e24585bf1b5ba73e54c80352a689b1a7b8f588dd. 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/USHM91820260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed418f969e28de710a5789f557c958a15dcd50717061410b34f777ba799aa92e. 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/USHM91820261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02524fcff072eb6ee34e22788b269831c14da18fe7ad03d74035800b8f028d49. 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/USHM91820262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1eab946339c76f281698c3554aae375f79302032cfce71a78425484aeda995. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USHM91820263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f55cc57e27333a5a76a4fa3c4c2a107f94070a77ec25224de2ce0e3b2763606. 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/USHM91820264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a709110269f2a55aa761c074fcbbb9589c0d010474489384fba0f6f601be5a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM91820265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e994954cc7fdd359f47da1199a8b24d46156f1a6ca2cc921d96799333ed6ee. 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/USHM91820266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f80d832299cd5a5acbdc57779105ca62940ef9d56c5530ebdead799c8363784. 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/USHM91820267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db9660daf71c9dc7f2ca7347b655391b0a6be86dd0e51e6c6140ccf376622e6. 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/USHM91820268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e438015c21a854a4080eaa80ca69aaf62e473ea2a3a8c33908a9a8944d660b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/IL4632406594.