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 0x2ab30b72b072705418fe465c5f8b490bed9b62249b7efdb838c8bdd151fcc257. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f816bb3-06e4-4a86-8c36-79d6c77b26bb.json and https://artists.proofprofile.net/proofs/artist/0f816bb3-06e4-4a86-8c36-79d6c77b26bb.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 0xde78a08ca46d3332d861b3b9fdf3f28895a9f54f25a7f6d607dd208efa66a206. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:52:21Z), 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/BCMXV2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d84921f3d9dd4a77e814bed1ef8575e2a0070bc5776a728fa04d3acc55973f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ5AB1982765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441e15ca103c1872613b65d1d27b3c0fcca65850caf490a34d3b37302f0bd533. 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/BCMXV2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c854af64e179b8daa0a893b83cf9015d38ccd2e9e75657804c5c164be777b40. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:14Z), 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/BCMXV2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aae4e52effb54d66ccd2ca87e6482b99b063fb0a7d1c6c165bb538718f5e825. 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/BCMXV2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8f509ada2b104480c210b1d4708a8589bc785e3b3b02cc5e86829fc5692c55. 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/BCMXV2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8707cd8f59f642829a5c2ba718c4996b17db818b497d5e10bddab44ae11b4a08. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BCMXV2500001.