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 0x16b5f6a3bb17bf0590b38e2b4ac3be2cb77b304f057dda7fc2abd17ea60d87ef. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d4d3e1a-681d-40f3-99d9-d9130436f4cd.json and https://artists.proofprofile.net/proofs/artist/5d4d3e1a-681d-40f3-99d9-d9130436f4cd.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 0x19aaecbb0167313cc59c3ff72347c4810af62f1bd4ee5f855d4a6925e96d81be. 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/USA2P1174272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2a9b80034dca8fb7688ce5085626cbf6a49298ff7eabcb36008021f770bb60. 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/USA2P1174273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9341c5b4636d5946e9ae506ef2783848e7b865334f120415db2ec742bda2a9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADR1820162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd26959f3bdc0ab8921f615fc30b0847206164bb94cfb336737832fd3373c795. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADR1820168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ceb8aeb4facc6cbf03f02e7c3b10878dc87dfcfa26b083b8710409329fd8540. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCADR1820170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9960aeaed257ffffb2b8051a9349526d3afdc9111219728667704b68d88068. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCADX1839064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1094fe9b802927c704c37779de778f1a895069b467660a414aa2de1e58c730. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCADX1839071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39435c2984b86d594c33053d7435371ed118cb09e7056d69d55e903ef64ef521. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCADX1839074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb148f8588754beb83e75f14caa579a38835f4bf7773a2aa2ed797ea132f99a. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:19:03Z), 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/TCADX1839078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb648ac0cf46fd208f2fb5c700a422530c64b41dc67d7697545cf6568221599c7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:46Z), 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/TCADX1839079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4621890c84aeff8a16fea9f9a0304359d541dbcfade9d6f4befe8de3631d2c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAEC1901504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc61c38a01e5c8b97ef04b51f3fc7a681afc08e48214159dba20ca78777ce32. 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/TCAEH1947252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4ca291b8d153aa8ded281a61cd2c91fde6a5ae31f55a876d68d00f849ee7fd. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/TCAEH1947265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cc2f5b23575ce2ed0ae17e72f40d2535694efba524075795f8b2218e88a325. 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/TCAEH1947267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6d9bb19d834acd3f2fdea98e04db8404f3ab6930e9edf58c553f8fc96265e3. 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/FR6F32102310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308b2902544220d16d8005cde19404fedf71ef6315e5022265b7f603351a5eb2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN52390018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b90047181a9d41ccb89a1afe4f7f52ecc0009b1a99358b7d0dd4af70ed219b. 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/FRX620105010.
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 0x7c842cddabcde79224498c128cef20978e537b1ad5d1f507d95914fa3ce8d779. 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/QZTB32226769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45077a40bf98e8c7d933e28333b5de1750be9c9e9c10c0a7d5fc95db0e38b7ab. 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/FRX620160120.