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 0x7cee4093df969c0c4b7dfdc81d42e1bf310439ea0e072ff8bc6fa3dbd33465cf. 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/69faa5aa-1fde-410c-8f0e-42796ba339ae.json and https://artists.proofprofile.net/proofs/artist/69faa5aa-1fde-410c-8f0e-42796ba339ae.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 0x81b9682d433d4e2cb88e6636f6aca6e8d495b683e8c78d13d429a633bf86e065. 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/USUM72200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fcf867a0329611fe03f008a8beef4a1e9486426f8aa5dbab2ce1174bf2c57b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:07Z), 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/QZNJX2366608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7a2f2e813a1005c001934001438e808c6c7431b8f8e1e1e2af4e164a1d2f26. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZ5FN2517378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848dab1565fa6d293caedcb9121c4138bc8e0a1de7cd541e0162f078a08b1656. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BK4DA2538544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8872f405ee2db19b5f8f9a11471533a573f8ee0e28cb712187cbec09e7542dc. 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/BK4DA2538545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fef30f25e298d97198d7df6ac7717c13ac4695477cbc6382ced367eed219d3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BK4DA2538546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d28def28d82150ad97dc89dddad7160edaaacebad8ab5ca02649b21eff5671. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:31:07Z), 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/BK4DA2538547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b093dcfa7e73a3c2bd46de7786b92018e70d12aaf11770a10c163cad27a48f2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:03:39Z), 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/QZMWW2576552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232451e06d0d0d1bc30f947c582cc1b4dcc50916d02ad2207c2a98c6f19c59b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLM2378384.