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 0x9b210b2ba24a00c4f472ed87a521c50f6c35fed4379a502dedd5397a19ccfc8d. 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/1d7b4118-5cf5-43d6-90bb-85f7b2d07175.json and https://artists.proofprofile.net/proofs/artist/1d7b4118-5cf5-43d6-90bb-85f7b2d07175.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 0xfaaae3aec5f7bf02b486a3f6f5ed03fdb7b55f9a0f7f42765f518adb310221a1. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:52:46Z), 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/CAL0L2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a465bb14a8a244b51e08e3baa3fe0a842eaa597310154edbe2b9332017b3698. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CAL0L2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a1ef863554785dee547bc663ba883dd1c7960a24ecfaf14396b182db819f5f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAL0L2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeb487c84bc13e4bbbfd7585145a8a30812d72efb7835cae2c2f90261259cec. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:11:13Z), 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/CAL0L2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec4e9325b41d95ca5be0b5f50bdc341698c566a1bbc0a6e4a6045eb2c27c985. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAL0L2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb84d37a368e18d1b0e7c03e140219aeabab6a5fa2cebe7f6e574fc7e1400f2f. 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/CAL0L2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9b5f28239396895e4b99c31bb35b0d5402e5d95374535be4e51027a962f2bc. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CAL0L2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97adc981bd567fe25588e15a46bab3bfb270230a60004e7ddd4b316bc3a00fc1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:39Z), 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/CAL0L2500063.