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 0x8c751bf7c8b0e1d75750317b4caac4c63b01324f274261f2dac65c69e4272977. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc423ebc-97d7-43fb-b9b6-395c03bb8305.json and https://artists.proofprofile.net/proofs/artist/cc423ebc-97d7-43fb-b9b6-395c03bb8305.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 0x8c25a07db86c2e9f2a4b96ef7043a759c7baeb9e4b73d7a50b1658e05fbf3cd8. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USHM21994461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbec8700ee3e184d1a89a889958603f138ce643bb19c9e82a8db0b42043d3b9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:29Z), 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/USHM21994462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80720157b1501027cb3ba57204d61ad3bf79ae61912c87653953ac94667f8da2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USHM21994463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f18254503ac3472501e846bb723209cb617f75a5d2c86dcb96de13bdeb92835. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:49:13Z), 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/USHM21994466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b416a731a9090c53b5f75d4856f227e8fb742d99329617e4baf3dcaac69937. 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/USHM21994469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49feca85e1ca73e9a715047855a0104d736d863fb0adc9d41446375555a225d. 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/USHM21994470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b67e29cead8f3c72a6da3b8eb45e93038a29e8a73536334cda4e24f40e775d. 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/USL4Q1910056.