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 0xf5ec482eb66951f226590bcb60a3d286fbb2060d1f1a3d29918191a66ef1f3ef. 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/d6588f91-f10a-4813-87b7-2ba420442283.json and https://artists.proofprofile.net/proofs/artist/d6588f91-f10a-4813-87b7-2ba420442283.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 0xe9d832478a63bbffe60fe56f7e9fa2df8c679fd66a03d6996cde5c8625720e3a. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:37:33Z), 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/TCABT1495420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969604999e5b4ae71be7a7298cd9ea54a458119d95a6ebee678a9323f34e35e8. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:00:19Z), 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/TCABT1495424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b55b6530eb9bae25299d7dbe467a560cf22b1ff4b28b6bd56dc49f11c88dd56. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCABT1495425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fa94a596525b8936602ecb6f2f9418c358301cbba544801d6bfffe35d3272a. 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/TCABT1495428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07ecf82a88bee320761a2078b9a57b32378fa366ab6ea82e4262971b738766b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:06:07Z), 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/TCABT1495434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb780c75bbe7735ed5862a83550acc39e5515a85086048123b4ce29bb691e8945. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCABT1495435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85c76bf2def1b929e76127336fa63237801683258d23c6a5db7b229d83858b4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCABT1495436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cce7f3fa37b6acb4c9d121e75448bc0ed4a1ab11c56f612610ac0d251ad0a27. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:05Z), 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/TCACD1574327.