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 0x904d8881fa085b9552d95234765a0e8f74dffc8abb9eafe631d63b8f11c29624. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f26b9867-99e0-4d14-ab2d-52f3208f214f.json and https://artists.proofprofile.net/proofs/artist/f26b9867-99e0-4d14-ab2d-52f3208f214f.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 0x2cd9a062f9160ecb1e08fa4d7291f5ac7994f1988cf6afdd837f519aef1be643. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR26V2008225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba3c2de8378fd5cc046208e304d6d4d257036a2f400e91d7e3db324a5f892a3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA062026135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dc723eb780785cb90ae57de288dc47555bb1c47d7cc4585f0f259b2a91b52b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR59R2129921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91782420443cab901bc14f29d252cd33a3de31b4bf9c44bfd8ed4deb1df77abf. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:20:59Z), 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/FRX282166551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5cc3f56cc61f351db67f836da0f7010ae97f946168dd3c38c653b175020d88. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TRA162300354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0207e0f9236226a4bd3717de479f03f1088232d1e15404d188525c6cf0b9fb96. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TR0012400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5843ac163b3dd8e00ce326e126c4a6cc701d6f3d384fb76d6fa75112fb5bd7bf. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:56Z), 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/TR0012400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bc2eda0bd2006caa841881d0c632167f542f4a1ec8d991734db8218ee4ef5d. 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/TR0432404738.