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 0x6c6882562aa9425d6b1f1ef7b4647e458b35b4db85a5bbfd2d809e2219c064bd. 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/f6750079-b9f4-45e4-89a7-f5cd7ee06ba4.json and https://artists.proofprofile.net/proofs/artist/f6750079-b9f4-45e4-89a7-f5cd7ee06ba4.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 0x9ab7aa864ce657d2ead126df717faec7456cf26ce7c85ca60e02442796d530db. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:28:12Z), 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/US4N80500475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe82f5976c1a6ed542206254b08ae1ff4b729f718f3b7089eb906c9c21faef0c. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/US4N80500476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408351b88c2067c9b7c99e4435ebaaa93a927dcca10578a5e43e4cd513d3ece2. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/US4N80500478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef7fdff4cc6a78393ade6183de43b05384d9526318d285201edbfe64b0fa3e2. 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/US4N80500481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3693e04c4b3146a72d4582d6668376b10b6605ad8b29714876c9c1c7bd2ebdad. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US4N80500482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81856250d297992c117ecef9812a506a3011ae948d1c61fc0b7915a77943bb6. 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/US4N80500483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d18049d585ee37927ab22e997ec0092c221ec5216803f22da1325db4142baaf. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/US4N80500485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8c5d10187c916dd74deb158f17238b368fd689cb583cee4f9271bad22546aa. 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/US4N80500486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5627c8683c71706d13d992980bd29ffd41e982fa385f80fc8719f20b2849af23. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USREC0300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506287a8fcf2703d5bf22817f346ea8d65e39c562ee4627a0764d1b6a8c05f50. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:57:35Z), 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/USREC0300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031fcfbe27743bc4511f8503e0cd9a49cafc373266de7a0d970aacbb8c222943. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USREC0300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10419b621120e8ae6e9523d3ad1c0224bb7ff323fda305ea3a4b031f59b1f278. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USREC0300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967414cd541cd1231b9cc3105a555925ac8927e9f66789b532921001917d2e28. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:31:23Z), 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/USREC0300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c925def8fc36a4397e0a37b79ac0b334d3fbb6125dda8f5bb90b0e21ca7aee. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:30:14Z), 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/USREC0300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c741e0b4800ce5aa4cd47cc2f54cc7e948b8ad3a2b1ae97a1e26ca8d3215a28. 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/USREC0300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173fb95ed8eb8fd26edefd66521e8ab93dbffd01beb9a7035c04410124cbe569. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:35:33Z), 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/USREC0300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6575cc274d72baa4e0bb340f5e52a4dabece7859192942dbd1409d3c5f8aa12. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USREC0300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967414cd541cd1231b9cc3105a555925ac8927e9f66789b532921001917d2e28. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USREC0300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a773a4482582891bbf916de865a80f2c118c47b2ced219f8397d7f46cc62c15. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USREC0300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173fb95ed8eb8fd26edefd66521e8ab93dbffd01beb9a7035c04410124cbe569. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USREC0300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79677d8a77ee0d40bdda3c8769030b487792cbe6b778fce4ab9bf24305c908d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:19Z), 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/USRVC0300002.