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 0x18f67f26470005d2167b83ffe5ca57599f61ef85819936f98b29ef772c518990. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d03a03be-696e-4f36-a823-81c661d244ae.json and https://artists.proofprofile.net/proofs/artist/d03a03be-696e-4f36-a823-81c661d244ae.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 0xabf24bb3b97d55caa28cd88f1c98265b232cf236c4c3104fb1fdc1d9e4112891. 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/UKG3H2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fbd59bbe073e57d9485a579d6274e0dea6d245780d18408cc9f21a061b271c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UKG3H2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8625aa2891beb45578f15dab1cbf3d14d7f753737090ad2a8f4fcbe650f43d43. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKG3H2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02f5fccf0fc6310ccca03fa4af15bb9f6473e290e2b25af9cf5c43558fafba2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKG3H2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ee5afedd416007fca118d2ccb4fae67b6b880f8432cd66093db2c45e9e39db. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKG3H2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a5c1806f94d762db71e0cee0dcbb548ffa52418e71fbfcdb80babbaa854945. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:59:10Z), 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/UKG3H2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240b5cdb3d27c0a41eb42a8c7e295c500f90d54bf77b9e111535d3deecfd1296. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:29:55Z), 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/UKG3H2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa098e3be577a3106450607b43d00be4b2db87fa29be485e6cb632e46a79b7aa7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKG3H2400011.