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 0x0d5ec5015fbe5571f22968b82b94a8984849c522da9ed8608d8f8866ddc9d01c. 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/0eab8d79-d91b-4d7a-9800-13f08726fcf7.json and https://artists.proofprofile.net/proofs/artist/0eab8d79-d91b-4d7a-9800-13f08726fcf7.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 0x44a7d8b7607527ac089bc748403ee76178b07344be3cfa9bf6c5337bd24c91fb. 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/TCAFD2047296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbee81f19f238d3754de48034345129ba2d150243af83df61f6c506a50889ff3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAEI1965909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1d255f178e8a89c34aab6f1e6d63b74f6bd21056e8f5140adc956e4724735f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:10:40Z), 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/TCAEI1948188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72db2d03135579cf1d62abab712cd73513491e967e0bdd5a5ee4daf4cbb4a46a. 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/TCAEI1965934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc7477d85f5d4487339926ba1d8eb7eff3820ac8824e4c2cbc4a93aad1a3f1a. 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/TCAEI1966136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afd964519929325f8cca1b2f636dd4bb84a4b921aef2d5efa54cb1ee45ff55f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAEI1966137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f88caf6ee051cb8c17501cc9d9d8c62ae50f06840fca1c8778b1e33d1c3a9f0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAEI1966140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c377d71c194b2cc162ee4c21525e4eb240aa71ea85ff364c47c1f8d0af5e612. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCAHG2374135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58839a6a1156da4bdf85bf96f11943e4cf4ba36cf63eaff021a44db746bfdc25. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHZ2419870.