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 0x275825b401621981ffaa07f7c98cccb35c804dbe05c16477111dc60f3dca202d. 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/7623ba90-6923-4324-821d-bbcd6d242193.json and https://artists.proofprofile.net/proofs/artist/7623ba90-6923-4324-821d-bbcd6d242193.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 0x02a1e9913dac40288358028e05fa371f5235204a0284813a78378f98ce6b2fb0. 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/TCADF1758421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03e5f3424e7200374705ec48df927bf1ec7db150f44aef735e1d2429e909d9a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCAEB1942399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8330be0e28ce2ddbcc1f87682b3fdf3b10d5c0dc26e03f6dc56cf25b8b75e997. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR59R1956938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f319a5ce065687d8ebedfad2240f97ae282b4c08e027aca849cdbdb185a84c8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR96X1910753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf3497a3b50fc9552b38d0f35243439d69ba4a62999626f98a3d8d3f335233c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRX452023522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6817d2a480027b43346567dbe8a61ef20bfb7cab60b81f3c489ccce4ea9b02e3. 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/FR26V2061948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1fc8b99bf7c0da1cb9dd4f54dce09ae8946108bb3ac1d9142a22077378aec1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FRS182026643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75e669a6f47e392c064456e04fbe5b33ed149c8f8d314d4d4edc8bb46c9e9d1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FRS182026645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5dfd9d394a6bb3d9c870b0803aff259bc430f13eb6b899d6d3d3ae781d9348. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRS182026648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f47383aa3407b532a6d19119574bc3853c7034ddf8c43bb7715959d435bc859. 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/FRS182026653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606f81b839156df8497644f30867a971b0632bc52e16c6114028a87ea988abe9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:20:36Z), 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/FRS182026654.