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 0x05702a04c88a2000028fdc0cada1be80cf3df9f4b359bae89617101d1d08885e. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee73e8cc-ff1b-4fc1-8bc7-9ea909e710a9.json and https://artists.proofprofile.net/proofs/artist/ee73e8cc-ff1b-4fc1-8bc7-9ea909e710a9.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 0x99e40efeea656546cd09b06137595ea42193eaedfb2506197a9281f91a6a3a24. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/PTVC12000352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047ca0d26b7b5480ff5ed565671e8f61c68e426b5ef8688e2d2ea6e0acbf757e. 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/PTVC12000358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb524e3dcecf8edbbaa7c57133c573248a5265d7004dff97388e9fe0a8e90c132. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:18Z), 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/PTVC12400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca87a80a3cc44852a04b7e4ca509bdad101fa56410a359408c44aef6615e2f2a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/PTVC12400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc6be1a9d3f833254210e0ca7326f041e70e31e2e28fde684b5daf7b8aaef9b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:15:11Z), 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/PTVC12400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a9a29f6b307ad5c22c224c23c796fa09ea8c0394eea112f713b62317881fce. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PTVC12400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e93e1cbb858ca63cc6fb13fd2e44731d7ad18a73751aa4fae3e0e1bf32a25c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:00:55Z), 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/PTVC12400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f4bbaf42fe393f0c7707eb6280aca5b865b893d76bd113c8c0a81885e838d7. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T04:57:23Z), 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/PTVC12400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832113948b422a12abcb4f0a85a5ccb2eb9ef3330e87f199d9439b72fdc01f09. 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/PTVC12400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb524e3dcecf8edbbaa7c57133c573248a5265d7004dff97388e9fe0a8e90c132. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:58:27Z), 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/PTVC12400012.