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 0x0f77af82e3a662983a6ec928fe1f1da960d57e2e0cde93e19e1be31a3da65e9d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e303723-3538-4c99-8ff6-b636b3429740.json and https://artists.proofprofile.net/proofs/artist/8e303723-3538-4c99-8ff6-b636b3429740.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 0x17fa71e9d8e0789fffce974fe08bd88b9af982e0d88d40612f7987e8b9c2c2f5. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/QMDA72338757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afcdfb76d0485d0614b4b1fd46342d48356b3680f558d902cdd8b3e62506f14. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:03:04Z), 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/QM4TW2443189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa384636853419c7ed606d065706f6d1539aa87d42d51a205a422ac907a330be2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM4TW2491276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f1f309563208fedce1d9e8ac829bf3795234d519cce69897cf65bc1b6f2e68. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:32:02Z), 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/QM4TX2433186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde235504ad85578bb2c99bf487a820bfd21100d636ff034988373d1a5fb512d2. 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/QM6MZ2509137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5487e000de49327ccebe97fe2194ce27cbd0e5dacbb9810a8d7292a2cc73236b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6P42539582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7a423a10a968eb689f72f08b7e59526d9858ee83a9749e89a8e7ae8127f82d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMFME2556760.