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 0x5b277daddfa587cd2a6c7cabf1ad704216ad6b7f564551d8180f2c83a8f6be40. 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/e25df6c1-bad0-4e86-9d4b-1910877618cd.json and https://artists.proofprofile.net/proofs/artist/e25df6c1-bad0-4e86-9d4b-1910877618cd.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 0xc1e4f9d8157ed209bf7dbf20433e5ffa14301c6813cc5ff6598ef36b9336837e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX202161492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dac8b138095dd1e83aebc73b3e390750d2b99daee8bd3ab6f1166e2724a010. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:24Z), 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/USZXT2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4726778ee779ae0bd8d2d7f62a88d67e7b9d4befdfabd408466fa289904412c4. 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/USZXT2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe068654787d977865b1118b6d1bc031d605841e0b4e81508734169a5c5c1e11b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:50:55Z), 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/USZXT2556256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e39c2fe515d3c44b02ed798d3e2998727d5409a03894fed9bd5e5f683954960. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USZXT2556885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1386fcd3ce4ca7c1725d30e41be4348488685dfe52391f5d24fbf1b61a030a1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:43:03Z), 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/USZXT2557802.