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 0x313014ef0f2f2cffe40ef63401afff4a7e516474d0991cad21fbfaf86759b292. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c70468b-f0df-42cb-a094-75b20b08bf54.json and https://artists.proofprofile.net/proofs/artist/2c70468b-f0df-42cb-a094-75b20b08bf54.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 0xf4d1775543f80cb00e8f650f97578ef54104ed939330c5a91caf489a6623e42d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE5XG2254207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59702f51a6f0d61f0748f2580c747c410cf2e4f0a2396e013f3dfaa1d857f07. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TLVEM2483926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102987ea84cae9621d8d022a1dad76ac342cb869f6e3ee5809d5482b5c28f1b2. 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/TLVEM2483927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d4c88ef506bf36b1b41b0b5b217b73fd485da1eb3b32c9c08d4831a3a04bc9. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TLVEM2483928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bebb8462dec8380cad288f4c75a09f3d92f0c697ad37196750c212350920c8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:41:47Z), 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/TLVEM2483929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116fc0b465685c483c8c465d40f2e73350015f5051bb9bb205eb427524e7bf29. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:59:24Z), 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/TLVEM2483930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c78b75b5ee924bf6fdc1fae135f9a2276399aa25d7013322c67718a2a24ccb. 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/TLVEM2483931.