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 0xabed1768ea9f27399a8f3e8ee158bffcc2e414dfdceb1aeb55e7cd2660ca3546. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7c76868-7ac1-4ae2-9191-95ab48961fc2.json and https://artists.proofprofile.net/proofs/artist/e7c76868-7ac1-4ae2-9191-95ab48961fc2.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 0xa820618ed2f86445f93c94af420879dc3517925bc47aef8286f243997b80892f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UYM121903641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fc6c311ce043da3f958d3b2f6f3cd57a2eb7b26fff9bceb1cd23c03968d868. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:15:18Z), 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/UYM122200432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6f5501ab8698260189921f7b69cfd1a2d35f8b54ba45c4e158ea7ddfac3d25. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:34:20Z), 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/UYM122200438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b8972d4f6ac2b0d076819ec95331363b64d4c725d14e4cdff9112ad8bd1172. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/UYM122300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e17775d16f09c246ac393287fcc3ff9f55dbe3cad87265f8f3a192d89164eac. 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/UYM122400441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c12d3fa90cfc27a039bac156853924ee2bc510587bed98e0d4fb7a4ab4cd31. 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/UYM122400442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b41d6b5df4bc19aeb23573b1c72ec1a10fc7f65a6e7a551ff5bc99d1217d11. 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/UYM122400443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d44dfd49f70d6021480414af0776d84628973ec70ae7ce00861fcad07770d56. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:07Z), 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/UYM122400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4980b727433a7a45635cdf325de47d15aa4a7b5d315e3a6eb7ad4d8413fb51. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/UYM122400445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c41a59495d2bd3c3d2857f5373ca6c775592cc72309f2ce0aff7c1faeaa9466. 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/UYM122400446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93928e9d8f5c687e1114cfad76f75910f87af892783f3b78ac92d94c61d04452. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/UYM122400447.