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 0xf5d68f1e330172b87b214c980d14bb9af2428f5341ef9ea642bff7ec24c8565e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff3089ed-edbc-4e2f-997c-84c131bf9629.json and https://artists.proofprofile.net/proofs/artist/ff3089ed-edbc-4e2f-997c-84c131bf9629.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 0xa57949cca66e92b1c48cd9fe0153e60cbc225084413102191a0b76e9c952b6b7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB22496413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123fa355f10de3a673d07d15cd1d85a42fde2b893ee49b0c595efc34a117730b. 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/QZZ7U2535283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057adba1b764c50ed4b3e52cb78a2f9c9521e93dba7a22974c563dcfb755c76c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:51Z), 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/QZZ7U2535284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d9452cc4b9a67348e54c67bf365f9b2c8a61c133af4ced93ec2252969126f8. 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/QZZ7U2535285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1ef7bc1e03604ad4dcd4b6b5c805418d8da77992fec38b526fa3c6a4382f1b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ7U2535286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37be91bc2a9ee6c0c2b066bf64ee4e9fd640b6c8cdc4259c68a1b722db97ef16. 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/QZZ7U2535288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7992eea5489a7f729c29a471ef295d31685bc2538a248710e41d7ea3c72a9668. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:38:33Z), 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/QZZ7U2535289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9882c391951db00a97e4df04d33a4f6f8ee40476678cf7acbe835b1f0a9ec535. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT3FB2519094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272a97f47e22dc0624a5441fae07696a29b106c43e1ec2f7351f5e9d6c438fab. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3FB2519095.