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 0x81b283e4c09b1bec10a7f61ced3442d701542fe21be7b78c06bfa5b03c4ca344. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e30022d9-ad19-4ff4-ab3d-43ade5ce477a.json and https://artists.proofprofile.net/proofs/artist/e30022d9-ad19-4ff4-ab3d-43ade5ce477a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Still Haven't Found What I'm Looking For (The Voice Brasil)
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 0x25a3a3e905d3d694c4be38cf78d6daac363f859229e6a5e09dcbe683d6c87b68. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QM6DC1736618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8749107e522f847cc15f26eaf639dae97dde1d92e65ac8393479592f2c0e4f31. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QM6DC1887152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502386a0a9f9b102f2413f95abd8e3d65b39066e90f55f335264fde80875685d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:44Z), 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/QM6DC2089279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2b490e1ec368c65469337c130c998c426bea0473f221e45b5af1d6ee8a66f1. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QM4TW2461614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9260ce937382830d2fe67440fb68bbf11c0a5f94cce17ee93a6b5667beecd4ad. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:59:28Z), 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/QMFME2490619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bbf34baf39295803df353545f711c04ac7fea1354e54fde68ad0f98c6dafff. 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/USQX92404392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cda77c2375274dfd27b1d5fba1470aa255b0e68b89bc300682624bb6944da45. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6DC1538021.