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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaccc32324706f3457c7e1b867df764f87915faa08fb379995eb0b01f3a5ed63. 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/9df0ba9c-ad6f-4bb0-a3d2-52b0ee26b7a7.json and https://artists.proofprofile.net/proofs/artist/9df0ba9c-ad6f-4bb0-a3d2-52b0ee26b7a7.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb484e7b0082cd925c33ccf0ff009bfd17f3d690df8aba06df45278e6a8488f. 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/QZJRC1970153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fe8217d81ded658d4367aeb509e82906de1599f213666ad3cf37c26abc42ec. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZJRC1970146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dc1b26b3db72f954a575067805640ace8d2566bbf3b7ad05336acb9da7be03. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZF8N2077610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1b6a4f70d44472548baeca58ebd4c19573d57975793078a7fd649b00266a9e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLFP2125646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7ed40428474eacc01c1981efa785d22866a1e53c48d9f40f035259991d9b29. 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/GBMA22147608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bb3ea500808bcea182d3557b6780041f98865be12abbcb0e46573cf123b422. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UKXN22059076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6db2bf9bf9d49f7fa8694c567419aa1eeb4c98bcee5f2f3a59e6f380b70469. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX3Q92319312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6857ccf9bfd761337520d6830163430de66f5572717943a2a5c2b8154722c434. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX3Q92353478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc80b57876cd44de110089ec13b542f1caa62ad53fbbf3aaea27c87be2f2404. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLFP2330400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14542e2c3e8dbf7753ef26a9490a68f560f1f6ca00da80cc3e5cbadea7cd16d0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/UKXN22340615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323f9ccbb2296accd8f44e7e7315e318e5122330d868ac8dee5377c0d539f79d. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/GBMA22364549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a4d62e3b69c5b7e949970ab30a0e3a35415eb1ae7de434e71dde004cb65ff4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GBLFP2530362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe461cea4ae0eb42dc3df625dd1fa61c3e6b0f5ffa28e9de2ebc98d9030a3c92a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GXH2J2587096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41802794a4287033bbebefda9e3f7e1a47bbbf478513071c22e9c7490e18409. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GXHND2574099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3d0510b1b3c56ff3469154d1d55c8329b775061f9f188fd7c83074153c0d8b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/AUGBT2572484.