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 0x4113fa289ba9b126c978c515da422fd27eebddd82e53068518735d28ae214afe. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cf6916c-9228-4914-9ae0-020460c5afcf.json and https://artists.proofprofile.net/proofs/artist/9cf6916c-9228-4914-9ae0-020460c5afcf.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 0xc9eddfd80ccdc0e4dd2d3562e8f6d5fec63bf0d0e82924b1ee7a80dbec20d878. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:42:57Z), 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/QZZ7K2447013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f41e010642037311ef6155e6b747920cb34de518e22419adce7de8b539a3c33. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:03Z), 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/QZZ7K2447007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b42f4e353043f437d50e199c2bf622a162d1c7fb02b23427636a0a5fee04b6. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZZ7K2447002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9dd51eaa789ed70284606c018782d1b3a5a08919f07c5315f2758cc9aa0c46. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZZ7K2447009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38c5e33e6517e603c4b5706cfefd8a0312314c4dd788e6a5efa8b71bbdbb55d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7R2420328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a46d6bedf7d5bc30dfaacf2e738ed9913b4cb6f32c954da64d02ca6a00a93c7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7R2417247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341b32efbccd57fa4497d9e583fc3e53932d3223bb97cbe16bf9c00e1e97615d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3F42461459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c01f326f2447ab23cbebac6868384e2f8f0e603416c554cb364383cfce92cb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA42581834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8441863463fe40e24783d3455515ef2d0a3dd33056391b332fe0db1ea02ec776. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:32:42Z), 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/QZDA42581836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70c53ed65e1a23a4b9ae879e388fc85a63cf29f7c75f360e0277de435cde943. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:13Z), 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/QZDA42579111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa012ca7a6707ab4206cac6cde8a429a4fbe404419cbf3b78c6652e020d511634. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA42579888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5e51b244f3b2a01eafe07c854f09eb6d5d25d078be84190b325c6d9918e639. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:06:51Z), 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/QZDA42517879.