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 0x790dee3caa9c03128c124089e772cc4a16764ea45dfc118aa56e87645c1ff643. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/894e04bf-eafd-42b3-a85a-07f0e100baf9.json and https://artists.proofprofile.net/proofs/artist/894e04bf-eafd-42b3-a85a-07f0e100baf9.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 0x987e10e40174251b448dd15171be88d03fe526e448af01533661ae0d0606a71d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZZ7N2453539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c7e434de179b1a0f66e5a0ed691cae22bb7b23c15702f6f6ad28509b602b4c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZZ7R2480125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20840b74a7beff9c80ed0dee5a023a4f36b9ef4c618c6ed93cd60fbd4f0f076e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:58:50Z), 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/QZDA82529560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e616fe2fad868460312cec73a656e3a30e5a374117d326a91e1ddd3ae9e5c05. 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/QZES92575583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced4876f3b43960e79eeb8dd72bc08f46374c60e2b6b235c1f0471268d62e72f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:45Z), 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/QZES92575586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad754e654245444bebfabcb82b24066a86665da3ccf9e12ce15341742fc0211. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNA2553801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8109c7bf5cf33396a4a9bdb066110d2bfb0163f76bf8e8abb4d92d910e959750. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6P2515998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6540dfb1642cb95e1cdc08fac8bdeccdff4c3462487d0df07d2b13d7e8ac5d1. 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/QZK6K2564843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc14f7b60ec3137a773dee78b23d118ca0892124070574aa74be1771cecae1a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWY2534940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde83928b839c89d0858e08f1ea2e24930e087e5373ff22f94a48599dd9513e7. 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/QZTB22558273.