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 0x7a7b4e9d2a4509a6b6d21bbdab504a4a34be67e80baab8aca37a6961858ed79f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4d1e441-9959-4798-80ea-c064786d119d.json and https://artists.proofprofile.net/proofs/artist/f4d1e441-9959-4798-80ea-c064786d119d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
K**wologia (feat. Jamajka, Fazi, DJ Gondek)
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 0x998fdf3ea5632687a3ce57b9c1af7da61aab3ce211d969e6484d48428596c6a1. 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/PLF241704094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa97436d5818756bf29cab6109b5a5d815a14acfe27df483bee9b4345e544e5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLF241704489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88902c4c79a2a0024f75d798bc3af16df5586f7d247a7ded17ea609c53851e3. 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/PLF241704491.
Patoprzewodnik (feat. Małpka, Pęku, Sbs, Maz-faz, Nnzs, Rudy Kot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2359d452847f4d0956b9857c4f46db4a8dc2036be3287185bdc227c310d06b1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:22:56Z), 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/PLF241704492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a9a714b3fe6de6433a1492db5bf679605bcd38eb17cb341418c87c1316f329. 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/PLF241704321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee109e0b8922924c987b75eacd13b2fed699d4d99c8fe599911fb8de8dc040d1. 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/PLF241704493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda33e5f7efd6761bb7a4f8947d920f6f6ec83bd09cd14e07999107bbe09c6eb. 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/PLF241704494.