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 0xc7087117fd11c26ec39b1b86fee9192ad7efdbdc427cd07801e180e85225dbf3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af226a92-53aa-464c-80e8-14f1cb6a6146.json and https://artists.proofprofile.net/proofs/artist/af226a92-53aa-464c-80e8-14f1cb6a6146.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 0xe9ec67c618836460f02e2e68702050842e359fe5d7afec16dce6e26e476374fa. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZFZ42049364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bcdfe59b4c36d2fc1d83b29c1f15c2b26bb87ec3cb5dbdc74eed5c5ed782e1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA52051987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1420968b80ffd951b6f1d98e62c6d6eb5bc7f7fbc4e2fc3e7de2f9178902046. 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/QZHN72093779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c2565c29d26fdbe9e358c7feb709fc6f04b070ef9bf987beff20d7d61642f3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:28Z), 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/QZK6F2131394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd154a93afeec56fbf79337b6f0775e876d30c4c9fba9c49ebf205362897551c0. 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/QZNWW2167042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0812bf16f3a1e2c15eea19bbd6b0887379216233e3cf0e7178dc7550635040. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QZWFT2515416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6101bfb542d59521e082129cce98c724e70d7311cbf91ffca509876cc70328a7. 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/QZRP52165398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861a7037790489a7bdb39cfa19e025243ed661e1224249dae2c8c3c5a8066462. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AEA142211100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e12b3de4856dca559df25a71d8973e551fe9a01d34d12cab71e53910108833. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:54:45Z), 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/FRIDO2416369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bea2a5d31449700b48d8fd983313176783b37df70a0e5904f2609bd1eda114. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFJ2538552.