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 0x5c79fec0f27c7c75c1fd132244b733ea1ea8d807add3ce08cfa1630c1f6217a3. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6735974-723f-4bdb-807b-b96606e5a515.json and https://artists.proofprofile.net/proofs/artist/a6735974-723f-4bdb-807b-b96606e5a515.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Serie Kamikazes: Barbijo y Cuarentena (Bonus Track)
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 0x7eeebd644534d194e09e9ed0ade32e5d401d05f8393795cfe67f56342344bf9e. 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/USHM92202619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5f776c17e3c2e3f0b928413497cdfe7891b9ced67a8d4baabf8d797ebb6ab8. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:37:20Z), 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/USHM22545210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd69ec2095d5bee8f5cc5e6edad8f7c81555b9cff6c10aa80c3945cf81603e37. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USHM92521877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8395ee8dac261e73e0630d134938c6ba38a157a1092b6ca2bf7fce59e0a13fff. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:50:43Z), 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/USHM92521878.