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 0x436d2947dece91e2ee58f64c14d272777dc0ba55e1e9bfab18e1c1835b0b1bdf. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcfe9232-fec9-4801-b115-4e57215a4cd9.json and https://artists.proofprofile.net/proofs/artist/bcfe9232-fec9-4801-b115-4e57215a4cd9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Long and Winding Road (Live at Milano Jazz Club)
Étoile Filante (Live at Milano Jazz Club)
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 0xeceebc0c7104e17100256f1d6ea250166108ba05a87612561d6410d3b999fea6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES6102300533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1015fdb71eee1755be761b98ace4379e1bdd980cbbaa3ab176ad883617f92a75. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES6102400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d48e987b0f0d89551b887008ca4da7fe5f40cfebc0e5e13acb69ba9eacd5a4d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:34:14Z), 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/ES6102400452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1c127e0b2a036d28f1c9757c1547814351c4702f1f419bb4962fb535761579. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES6102400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8869aae6993ead5b0a13811ceabfef227195c3ac46055ced9285767499d49633. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ES6102400454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef361f26464b2b6320bd67a9583078defd427bbd0bec72f438936acb0f366ce1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:42:45Z), 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/ES6102401243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55464231d359427e86b8c0a4c6b25a0ae0ee2277de7ac9e967711f99023b908. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:25:08Z), 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/ES6102500146.
Three Little Birds / What a Wonderful World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30316e2cefa7429f7f194d825ba78abbbc966eaddc4f6bfb790a42550f7fa0da. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ES6102500589.