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 0x9a7326b4101a0d8a2e703d238376827ec5ce4098399cd647a4b7e1208d742ccf. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f072b74d-69e3-4f63-81ec-5b839623d05f.json and https://artists.proofprofile.net/proofs/artist/f072b74d-69e3-4f63-81ec-5b839623d05f.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 0xf0e05ef5ea786bab5d45bdc4b01ded9f8a8f236e87634105caf56118eb31f957. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/FRX872129078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6eb40b6aebfdf6e76770244373798199d9e4f0d7a745c5697e0a66d43f192e. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FRX872129079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f13b98ab497966f64865ff5e1fb336433a9ed2e5217e6d152e585d6066b3c2. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/FR96X2307972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b460274ed034f6d59473a77feb4aa8e2acb0f231d01ec59c5f707db6966bca. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:45:59Z), 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/TCAIG2402128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf11eadd6756ca5cd936b9f28c9485d3a02347464f10c948a84d17278ca68a2. 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/TCAIO2416893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b829c12d7e3b8d92aa69de3f4914ab4ec97d24744273c1cde252cdb88df6b53. 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/FR96X2490109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe917ddef4e952a034a263b4ec413c187279aeae6deca95cf7c08009b340bc922. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMFME2438586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb3af63b2575ac821979bd86eff5e09397fdce1603afbb7266cc44804ed280b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAJC2479595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4f312a538f62c34abd3e1ccbf2fabf42d3b17c66a75573452a01896910db11. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM7282592196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e6f273e229fdad42b15f459629bd0e5dd9d632c4937921f305ae4caf696255. 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/QMFMF2541080.