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 0x15782b2dac686350107558042e3b72a18eea91fe9479f88d9be67ac480cf48c5. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcefaf80-7406-4add-af7e-7463fd39ec8b.json and https://artists.proofprofile.net/proofs/artist/bcefaf80-7406-4add-af7e-7463fd39ec8b.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 0x952cc77c1f09c3ae10f27dbca6df651e690fd9dee1debf819d2d691ea31399d7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCABK1204206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fcd7e7b3bbd1d3516ba295abf9f8133477b692c138a35281bef4d00fca478f. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:23:16Z), 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/TCABK1204208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8aeb1b9112851f8584ab8e2750a9fe32323ac71621c401ee5be57fbc7d36cc. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/TCABK1204210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693edf904594aa5d1186dff5a1ed64f7ac3d81acbfb4d62d676543657668d374. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:45:38Z), 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/TCABK1204211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953fa488bea36d92215adbfb53580bdae94358f92c2517688e4625217adf9458. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/TCABK1204213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c6e663ead0efd7453df74c976dfbc57cfd84275ec78076d946626a219e3e39. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/TCABK1204214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641c6620cd0d4c36a5a6553227242d114892c572a991941ca4a077e5d5a7da49. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCABK1204215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0dd7dc302358976ccae2b566e774c2375db7736308d919182d787565f6099e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCABU1490079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6547e63a4bda555a09442ceb483156b1f09e266db3c77b867560e7d7bbc53f. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/TCABU1490082.