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 0x075a051e241287bfbfd90cfc0c1576fc12a014960213804398f9f9c723bcf0fb. 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/52422938-5a01-4574-8444-06dbfaa2b76a.json and https://artists.proofprofile.net/proofs/artist/52422938-5a01-4574-8444-06dbfaa2b76a.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 0x214934e4e0f76900ac449761eb7c32234082a34da433e00d00076b4f37b641ec. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7V2431534.
ถ้าเธอรักใครคนหนึ่ง (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc022be3b6ed8948ee6207cb819aef7a5c69597a35d9f499f2ade9357f977f3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZFZ42536748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a2c1cd17153c1aeb4eb77d4b798af480e95efd8f2873bd804b7245f569a6e6. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:55Z), 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/QZFZ42536749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80834badd77f7d201241d5fc251102f8cea36cee1d4a61d7a638d42c6da3e1ac. 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/QZFZ42536750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee7c030a24568211b6713eb241e636f03fe10693a8b4cfe928ab44514a846fb. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZFZ42536751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc142e0252a3dca19cd72965f41d269d4e2e2af11b26d33d00848b3fb68b303be. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ42536752.
Comptine d'un autre été: l'Après-midi - Amélie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc98cdf891c7e5be124a2ace3a933a5cae985c2313d9185309f2e0287cc11a2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:10Z), 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/QZDA42552146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43c5c763ba333d380b71b63b090a24ba695eb591195ec18e8a759fb84b28ae3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:40Z), 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/QZDA42552147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1c36645db78dfe0d24e3481bc4a342fbaf5136781ee03ef4df3849af2f534f. 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/QZDA42552148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85b40937478d516b3970bfc5167760c3c8cee8f1a4470847c3b98f37f4a3433. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:55:27Z), 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/QZDA42552149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f48dc610747398014beadb5f776f391eff1b69f50c40ac558f87a0666b9ad9. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZDA42552150.