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 0x354918f2b4005fe4b9c70014687bf7c3936e5878d9d3e038a33318b256a8f91f. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec68edab-6418-4b67-bdc3-28dda909c8e6.json and https://artists.proofprofile.net/proofs/artist/ec68edab-6418-4b67-bdc3-28dda909c8e6.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 0xd1fc630666e18a9da1fb8df1f08dca9356eae819665330643bb223049943ef1d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ1883002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe2e42fb3aa73bcd073ea16b8b8e6f3eef8b2e82187b7077641cc14f21c74d8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM81842156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b8d11fad506ca5894fac404e8eb8628c4464ae950524da9e7bc7636297dee0. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USL4R1808274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8156c81e771f0f89fe70c277d58f44461d52d462800da8eeabb760ac9464ffde. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q1914030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ae6d9d18bad4ef7a0f864e83f957520afef9fae4cae4a0fd2340c990b14cf5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:25:00Z), 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/USDY42041606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4f1dc14f4fe783faabfc4e06451a0c248df2bfcbb17fc14f746644a9bb4768. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:51Z), 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/USHM92099232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52434085f0aae462d98381fad215e4eb891efa8a66eef7f24749785ce9920111. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USL4R2466237.