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 0x489842943bb1e6dbfcec8d7434a8fbf144e96cbc4228e15481bb269adbcf6d97. 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/4808f79e-7927-4e5f-ac6a-c6eb0ad0d6e6.json and https://artists.proofprofile.net/proofs/artist/4808f79e-7927-4e5f-ac6a-c6eb0ad0d6e6.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 0xfcb24c322a073e57727ebbd4d11bd68fb89f690d00c663dab71e723a7531ed31. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:03:42Z), 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/HKG732374060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd653759e4c91ba0c826013480ddf0f2a7bb3c88a407876fa0f69c9606e2962fd. 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/KSA012278366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88469a64588fd083edc4634dc29ba67858949beca2d3ef60dd7b595f46594891. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/HKG731682731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf641d5e96656e3945dd846b08a4dc235ad03c34afdf61add4ad8b136d3cd36. 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/HKG732405477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21554a78dab17c3bda7dc256c68e8646b7d1a2c2f4cd7f186d5a91660c964dd9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HKG732467185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a9169c9b75730da1574a355a7fbe8540e5f588382c4ee40c2792a935bf1bff. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HKG732493587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbddb711b55e974994ddeae7862549eba10715f8e9cad0c970b8ca0fc0774e5f. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/HKG732498950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2eb798c439f39ba54aeb7ae2a7859d7befdea6380f2e9775fb7e46d9fabb52. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HKG732556684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17dc74877141abdec670312e0e02c4b61422ad350696c3b8e9a1910591bc225. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:13:22Z), 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/HKE672501054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90815eb6c7e07797520c9104ab5f45d02533aed058e6d9244a2ab2915c04264. 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/KSA012280181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a5b2cea88ef301000e701a3ad3b65d287d64296b1b7188253b9f784b3ad240. 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/KSA012280176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe77d5f06f2b3d35116fc20e14402e30a2de38ebd8e31648338da5b2c0d1f7cc. 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/KSA012280178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7934fcdf6da3eadbe6a0f8d4164087b9673d45c086ef84bd4fd29266594d7d9. 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/HKG731684588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc670b1d0e4bcff853f3f61a0f62e965ea5ed4338f34d1817f8a1af71f913d1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/KSA012278358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f74ad3bb62a6d0c55deb4cc68f561ee0da1539669d3441cf79898a4e9dd7c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KSA012280184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd09e964d93afdf60087e166f54eb4e920b3056eaa18dadbe20168a148894b19. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/KSA012280173.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a5e29b5b471b790e62e3378e0d670c67018343751e33f2b15dcf8688e96643. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/KSA012280174.