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 0xfe57111260c59b6a3e3d1c7af6d8559c67e235fb6dffa0832d957527a1a6abf9. 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/5c42ee0f-4382-4a1b-b9d2-c1ae9cefc936.json and https://artists.proofprofile.net/proofs/artist/5c42ee0f-4382-4a1b-b9d2-c1ae9cefc936.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 0xbee98e1ea733e177c6d03a735fd384c57a8edade19bfa60d8f2d42a7fad861aa. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/LBA0H1901117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfff09dd286c72b6052572eeff3cdb841c7102733238479b7a9a74e0c80d8a10. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:23Z), 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/LBA0H2000760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d648a3547e9fe6600df262446f08004a9ab1a163fc74b5e5e1c655c684d4a51. 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/LBA0H2001135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6ac3bc860dc67ae993385f5b7f565b4c345d215beced31ba56ace96113dba0. 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/LBA0H2001236.
Mawal Hawalet / Qalby Wma Sabo / Tathakar Taht El Areesha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7a15e0f3e07de0be2332ca3a906d73887491fbe6a10494a34095400b84829b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/LBA0H2001280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf639feb543926b55c42c0207a679856522b176508b37beb2073134cf0f1df321. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/LBA0H2001885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff1583d624a63f4772ba2282ff857ac4a974f24a6ebcd683362f1bf8b2bf46e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/LBA0H2002201.
Walah Ma Somak Ramadan / Kenti Seghayora / Oumi Lanedbok Welda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b52b5fd79ce8e04042e593ae7ae8c3a4e341900b8ef40857ec9a4daaa6b944e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/LBA0H2002370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198c2623f21acd10c3f269d244c61d9a8f4c15b5dc3c6b12114181a132cea7c5. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/LBA0H2003101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8683327c2f93d026d9ba20ff435663eab5ad0cdee092fd083963c075083ab7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/LBA0H2003681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd1f9ef714a302237416f7aa534ad5008c64451657d9625d7402bd452d78d7e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/LBA0H2007674.