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 0x2d8e75abdd714aa6af8c86acb31e9ff8c79dc0111c3c6767de5ed9c167774a19. 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/0ae457e6-9a4f-429c-8a97-b8aef4fb754c.json and https://artists.proofprofile.net/proofs/artist/0ae457e6-9a4f-429c-8a97-b8aef4fb754c.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 0x4376520baa0cf23fb3a7efe0424a27a8023878b9734a49e209a4a1a7eea4d092. 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/QZZ662403518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc321ca21beab8b8eeeaad592081bce0c7e67ff56d915dfb5860eb6f6597d9d31. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:32:50Z), 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/QZZ662403520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94974b3fe3d58d4045fb24a0522ecc03b45172a5b15436c74ca14095262c47c3. 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/QZZ662403521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e77de6c00db24e1f6582c216e298d8f0bb29e0be6c3f28864f5d668e8db6cd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:38Z), 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/QZZ662403522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802a837540430e463d2b4bd0960c7957a368f072437d871f9c5fc997e5a6645c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ662403523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa404d10af8b075af0ee78d6810ea29f71553f295d8c276a2b4f68a2cae8b7710. 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/QZZ662403524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9cdac9bade1fc22d21b6ef91a7d39f339c5b1bf578e9020dc4357d75f9fd5a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:03:37Z), 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/QZZ662403525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d83c6d979b176061acf12fd09f66911e7e87db215accb0c50cff3cf226f92e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZZ662403526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32d0930161650070cf57e31b43f76d3a9ae02c1a13b93972c2f9f881c562de2. 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/QZZ662403529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef21a8ed75b2b1ff67e0fa5b01606267a749ec01e9a963fbdccbaf8b9d9e0f5. 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/QZZ662404079.