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 0x29e3e181fccdedfdbf0971c7851dee187938355f79eecfd5689ae24756312bc1. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5cefcb8-8fba-48e6-9f31-bb745c7145ce.json and https://artists.proofprofile.net/proofs/artist/d5cefcb8-8fba-48e6-9f31-bb745c7145ce.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 0x51c56be06ef65621ba113937340b2bfb6ee24fe7b81ba219d65813c494f927ea. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB32304433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7d5672c2140c45566943e1b191efa86cbf36019fd9548dadee792ea9953494. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFH2339993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc748e26e9644b4a13a1c2c78d33e345591167e70ed56a68d1b8580a1811e483. 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/QZK6K2463464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2708ebb89d749a843dfa702c6551f7f02428353cd2d03e184653e297c21fa8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZS7J2463185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b9dac9f19548f3c5dedbe025ce6d6d98e9a7c153aee2cd1e70c9ce2e1a251a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:05:39Z), 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/QZS7J2412962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b8f6e3efb7267a794fd10cc7ad1d758e01f8605764fb1c3dc77df4e67697ca. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZS7J2487667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f49c5854a46de461cb75e40ae1ae2fd75772092659a8112dfd4398f55cc27ee. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZS7J2468600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242d132e176dbceafe68597dbd4c6d77004df2c305cc3b1e20953a7234e61204. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:23:06Z), 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/QZS7J2420260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23384e3379cdbeef9d0cae65f50cfb59601f5e4d115127990f78f2ddde96c6eb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZS7J2435203.