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 0x4fb38a737a22d067a46e6c89ef87d69e632b6f2fac1b08569639ccef2e93cdb8. 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/2c28ee0e-0ae2-49ac-a9ce-6470b418ca00.json and https://artists.proofprofile.net/proofs/artist/2c28ee0e-0ae2-49ac-a9ce-6470b418ca00.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 0x219ca66282a999d5440d16cbf8861cad3e2d116ceade7046c268e245f63b99da. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN82394017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2edcad42624d2c11e458838592502246511e744c74bab9c054f42904f16411. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6M2389705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24153c19b7935e63f2b951699a867954f471fe3aef212e6888f293d7030457a0. 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/QZMER2325362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa073a49080f1701ef5d51b0b328e0c9dc248c6900dd59dd57cd37f1e989e9ac8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:09:22Z), 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/QM3DF2262542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9064a039d5c40f674b3387e355a61dd36d1c04de1a432edb8fdfc72d8a0489. 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/QM3DF2262543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb44818881a7b9a879ef139bbfc7ff7c1ccf2685638258780a74ebdb09bc65d. 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/USANG2434150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfea3d587750a46379925aac7ba81ed8f8cf3758967266dbf647b5cff875884. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5XG2388401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f13d8ac45b6e5a34f22137177ecd9b669b52ce17f2e9f613c4747b71fb16676. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2465418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd680a5fa609bcbc5811cda6fb5ff994c3ee046f126836fa223f279e85394ffa3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2402946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc95199b664caa8b6ab659bb0abef52d6e3b03c9906efdf0135a1e9f4eccd4d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2409115.