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 0x23918d3ace7d93b954072296b036d78a92bc99094f600fee1a53eeb6e4603fc4. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0076bbf-8fe1-429d-9ec9-e282dce9f414.json and https://artists.proofprofile.net/proofs/artist/b0076bbf-8fe1-429d-9ec9-e282dce9f414.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 0x04433166bd575a6283b0ce6346b53b7e8d4420a8b0813ce8842d641713677601. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6H2373246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffefb628c50f857b6f6f713c76b9cf938852e7b65fb16498fd79bcc5288f1fe2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZK6K2383812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48270ad28affd3f4f2283ae32a1603c2bed071f877534cace01c4f240abdb8fc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES71960768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286b12c7a6666c5edec16a9f76b25ff567407e4ae9d0bc89ff1e34017d040d9c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1826391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361de0255a998977ba6a5bdcf42ecb3802b02e8d74defcf181de624904050936. 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/USDHM1826392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17a865c199a2c3264ed21feef4a6f8ffc335967f5477e286c10b32cfb21d154. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDHM1826394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ce7460058e7efb7ede984734f66329f98f942ece7a1f0e1f8c0841d5622cf7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1826396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325a42d8ac594ed8d46ad61c09e844b9ad57e496719b8007d65454530bde7342. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDHM1826397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf076b5f7f62696a45deff4c8b7e34b0640d78e7c41903d14a4963359413800f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USDHM1826402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b633f029a18bd728181ff1eca267e643859244279deec6ee23a3ae51ae3e5d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDHM1826404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5241953122093c7d43d1a088c1bdbffb4e5f0a6baf5e4718e6a225c130a729a6. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USDHM1826401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3137a9c426d1d71714150cdc98c539feb486e48b3b9f798ad379531076ab47. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USDHM1826406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c8ec55c00ef46b65b8236c531dd32117ef0f7a6ff308dfb6ab389deeae5ede. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNC2069941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82a7fc126d8d888eb902a080e8b76cb783587e287548640962b0574addb26e4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES92530074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc765a287c49b87c219948cfbe882977e3c3ac99da8af8a9f5f086a1855dd318b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ7W2463065.