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 0x5fb3ac35088e564aa32a3480dee558b3cd7bda17aa2f265407a9f8958621b2c2. 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/bda2b674-d67c-43da-a4d8-406b9e38231c.json and https://artists.proofprofile.net/proofs/artist/bda2b674-d67c-43da-a4d8-406b9e38231c.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 0x40155eae109c2fbb58e772ad03dc21f475477b650c2c8809890743bc36c6cf24. 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/QZDA81853819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99516f195585b53ecfa80e5b4ee66da6df26ae32d51944684f3e4ee137eb5d33. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:55:20Z), 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/QZDA81853822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd49753adc034127676051986d467994790829e9d49cfa2754543d76127b6e8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYY1953856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe301bd6135ef881b12f7fa0c23ede45704fed14eac033cdbe5c0b45e8ce2a96. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:24Z), 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/QZFYY1953858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b46e0c70e919525a28bc1b8a21972c56ab079c0affd27829c4324ee127ea59. 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/QM5LC2100181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5dff07a86825aa816e59e37907b702560c2eaae8427d19510d11811a1136bd. 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/QZES81917555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba1b316fc11191d7209f459d7d1c8cd5289c4b0ed8e098605de52064620fdc8. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZFYY1953861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5a806acefc53917524949d33c7d24988c4cc92fae38b59f97256e1013b4b62. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZFYY1953863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1af9be56a1b5fc954e5007b36a39c029109b1f13ed687bb7eb0e9a9940ed31. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZFYY1953864.