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 0x2d93be359ceca37bfe006f6181c65e6ebc3c7f65acc372b33718f175e28e1346. 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/ee85fbf5-9a82-4ef7-94d7-419e965e2b2b.json and https://artists.proofprofile.net/proofs/artist/ee85fbf5-9a82-4ef7-94d7-419e965e2b2b.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 0xda4d6c863f04b1374c2f263cd8b22b74ccbe5c0f4345bf6892f6cd361a59c760. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB42502232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076db25d30a5a04439b516729fa908c27df5d30d3dbca4e6c0a4d87b5f93a6c3. 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/QZTB42502233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4320099e893f2c80a319927ebb5c4ec65bc802649ea5558bb650c1ff69a84714. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB42502235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46acd140eb7303f764b8689b0d47630b7f28216daa7d873ae1f4f71ac8d82bcf. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZTB42502240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81df2fb6b447580cc0d26d3c5ccc7f8d5ede37819539e8b97ad1dc1be8bb0104. 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/QZTB42502241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8744decdf66414ff48ba2b1cf4d4fc166a7c85833795075caf71c327e610514. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZTB42502242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cde3a8c9e5e3f3dcb1a302354c8f3cb13ccc13757f2e0a839099f5a789fdc0. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTB42531822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2c3006a943e5b8a0f73160a38aed25c87762b161a3f64866fb2128e95f88e3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:06Z), 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/QZTB42531813.