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 0x1b5bfc596b5ec75df7b4fc0fdef6561085d4b9bd06026db4c624c4b7dd633f0b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3edd00e-9166-47c8-aa41-71599e0b76de.json and https://artists.proofprofile.net/proofs/artist/f3edd00e-9166-47c8-aa41-71599e0b76de.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 0x49f96d94f27793e6909a4181964275c584a53f960b4155e5161e1902abcfc899. 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/USUYG1304668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8431bb8252635ab929f5d8a235cf5e7a05bc6ea2cb16d1e2bc4ba6f54e3a8b1d. 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/USUYG1303534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191c7e603edda69ca35c6206055d35e7ee2c1ca89ec81e3e76962bcf50249727. 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/USUYG1304670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919b48d36f9befc5267ebe084c929dd80e742656c6cc4dc9762d5fbb866f8ce4. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:07:15Z), 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/USUYG1304671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73157bb3d406cb03ff8e4a72f83fc1360f7adf6b43f37bb49a35b3fee76ac951. 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/USUYG1304672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17612cb857e3487c1552bb05fd13cd4dee5a9db97d72dfdd9a512068abffdb13. 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/USUYG1304673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e986a549dfbcbb79c7d39b635c26f5ea8798180e4f9fa85da5edf5d900d73. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USUYG1304674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5d0b11b98ef8265c30291d6097f9e34b46a1d4875ecad8d8e8b73936c9721b. 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/USUYG1304675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ba603255f8aed8100fa1f377529b8c95fecd3753ddc57268ac5583f7a4a2dc. 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/USUYG1304676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5938ffe0fac2d2e673515778efe1e795d7af6f43b45e3831e8c3372ebe7ba18b. 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/USUYG1304677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb629aaa64a7f969f19a1a9b202eb462be623ea763db537267b24473f3f49278f. 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/USUYG1433890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587783a3d211891f49fc2d83c5b3cb090d25da2a3b09e6dc9c1f42b4a9b16680. 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/USUYG1433891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380a193f01db3dd876cbecd2adc0705425d91fa5a05ca35aee8700ef45da6db4. 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/USUYG1433892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b42ec2f433b0c58922ac268e8dce971f4334adb3ef97afad3c49710b49b554a. 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/USUYG1433893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ee38bba644e5ffeac10b2336cb1185af3464415d014fad75fb5f3b97f86424. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1433895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f648da3538815d8307d1b91eb4885330d22c7e55828c2a15cd4da6e1a15878a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZHN82254365.
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 0x3b503321d82507c1a706729bd9466b157309866c4c13ccaabd4f3ce386b77106. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USUYG1304669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaac682234784d5ce1240fcec1a195932b8b73fe606109978dd77bccde8439ec. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USUYG1304678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3198669adad15a420bbb4f84c3808b88368f38f7318ade6f92b378e7fea8ee2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USUYG1433894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f807721213f96b51f4e77473239502715611b7713fc0488a650726379534d0a. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USUYG1433897.