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 0xda435b75d663c7e0811e99193a05edefa1a455dcd32247eafc14706c2dfa8bf1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98775163-8df5-4ba6-a531-e98acc1861f5.json and https://artists.proofprofile.net/proofs/artist/98775163-8df5-4ba6-a531-e98acc1861f5.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 0xb445c3b2d512c8155a07ffb938ace6b67b7ba7fd431dcb12c56e807e1860ac83. 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/QZHN61996638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42adacb08e7206a600269cfabd74b85711ae9d82f6b37579693e0c3a9e08dfc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN61996639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0448d30569cd4d8a87061a5f2349dd0d29d3dec6399e9ceff69d928a613beed2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN61996640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e896f1010d833d41c9d31519ba12851cfa607f8f84bef8e4657724ade658a4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN61996641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0743303f2d15f03ce27f59224f50eab10aa827bfdd5359c97c01173986a3cf. 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/QZHN61996642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ee1a2ba166d934ab738b9ff8b13db670fb1dc2b8dd286c616aa160744ce08e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN61996643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767f7136f4fc9e3c4e5883425567e45709d7e88c9e65c3311de48ca25154cac4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN61996644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47398457c12eb0bb0b649479ce2346e609cf23784b38b42bd9e352caa487b43b. 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/QZHN61996645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a08084d19f5b20ee8265ea4d7d18a358fd46b1aaf8b9354794cdbf1b0c5d87. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN61996646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4869cfe954a8d9fe9edef6217fd6bbe18fb29ad33b36379775124de9de428dbb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHN61996647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ca5dcac27b38aabdd7310882da6f0bedc8b06e0078d18e97dc8ef6c96b5a7b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYX2043346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe377fbe755a406feb3b1df1043872637c598ee27242e2169a8ee4e8a65712665. 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/QZHNA2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0391d916d5fdb207ee0516119c5fa6de624fe148ecf2bd9c92574217f4b03a30. 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/QZMEQ2000395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22695e2428beff5e6de772ba0c14dfb9fbd1a0c0b1609a58b7a2132c76723f9a. 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/QZDA42174161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda84817950cf345a672fdbd09c01641c45f7eeebb1cfc2a0d8094b1d716532e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZHN62192504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669990643fa1c643360fa482c9ab14e3c39a887d62de01247ae68c4c3fcb9553. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7X2554769.