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 0x796193f122d55c4dc94193ac2a1369ef3e52ddca0f18e503fe80e74d1d582ce5. 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/5f994e86-3fe5-460c-8618-e16f41351650.json and https://artists.proofprofile.net/proofs/artist/5f994e86-3fe5-460c-8618-e16f41351650.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 0x457bdec4067f36b094f607924bf0091cbccd06fe93f5ac56b2a651a5bd0c4651. 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/QZN882260879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25e1fed11d80c6dc3470198902acef4288b08b10778874f5ee54d4a6c2044b9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBKRT1485901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7fdb4f8428a71293cf029b1924469840cf459874488fa517a215836d55eb46. 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/GBKRT1587501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b80630996efbd2c083c14f037606907b4be43140dd23fdb725aba676e68ab2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:11:19Z), 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/GBKRT1587504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0c075ce930e8c02c1afa98a8f6e1f0596fbe926c9d3f0f7fa19f605afad2c3. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBKRT1587505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cedcf2ffb65e98a33b6020c80304398e1c0db5f5292b44d5b50d922ffd5d875. 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/QZFZ32005539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b3deae8d78e3314e7ae7358407a25e72bfb6905043b57de81cc4bc8c922d5a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:51Z), 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/QZFZ62012302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea6c6e79994247be4548168e6c79d8697c4c8e84764b3a1c905cbed4bc248c1. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZN882260843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea6c6e79994247be4548168e6c79d8697c4c8e84764b3a1c905cbed4bc248c1. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZN882260843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22fcfcd7d57760ee8c006ade1da0173c03d94d65afa78fe5977feefe699d89c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZN882260884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4e2a04b2c747458c18cf71030904b444a21cfcf71b6dda03e9db9f18255be4. 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/QZZ662315995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711d46ba6816ab060d1842c9d1fcd2eaf1fea061a276403f1efba7e35d3b62cc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6F2444020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3065bbc431abcdcd6380854e8d0e52acac6dcdb4222e3aa8b859060b37f02191. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:46:48Z), 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/QZDA72584544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f86fe86e3c6d4ad8846e75a663f8cf2adfc662f9afe33bea5fe199a1d3ea88. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:51:51Z), 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/US38Y2546409.