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 0x4bc7011bd15bb596fd00dc76daa64995adc006c0a48b530382e2fde5cd24d276. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b081daca-9fd3-45a1-bd38-c9c4e77f54e7.json and https://artists.proofprofile.net/proofs/artist/b081daca-9fd3-45a1-bd38-c9c4e77f54e7.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 0xb453a55ae768e0292cce9b09f678dd35d568f9257b0031634147b903648958b0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5W32307266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff52f6d71165ce665abadeefbde0edcc4768f416543a7073b824d0e9c87e574. 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/SE5W32308716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6184d132ae80acb08574e6fc172325fafe9bb8b16efdf8fab86704a74a56dac. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:01:43Z), 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/SE5W32308753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b75fc8505f50b2f585e485022cb624a1c560574106500688987660d1af47da5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SE5W32309121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3369bfe0754a34678250bb2c434bea20e7186913ada23be2912a87d783055d1c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:47Z), 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/SE5W32405244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fe13d33afc4cc46ea7e6bdc820e28d5834fe6614648488ac40b8481a5dad55. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/SE5W32414447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c9503eba046c849c1c818fa680f5a1cd9090e812796d04f460b2caaad6e670. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE5W32467893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19221779d8623ceabec48c1edbe09465bc15423ccc7d5f6feae1c1985e902e20. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:31:27Z), 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/SE5W32508052.