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 0x956f59cdd3a552ddb8c013a04e3a2ada148504da95e96b7e2213d72fed7b9a99. 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/10e22cff-62c4-4522-8064-3542663037d6.json and https://artists.proofprofile.net/proofs/artist/10e22cff-62c4-4522-8064-3542663037d6.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 0xd32ef6ded3ad2630be89eec6e54f988ecdd647f977b9f90dcc86c3a685932916. 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/GBMJG1614652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bae86bf80f4f120a5fc7f0f10f25e6921afce62a95725a016750971fcca7b2. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GBMJG1614655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8c8a6a8b5cd68e1578c2ccbad63f6c76d16f7f5c56c9e03b86b6eda701f012. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBMJG1614657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502a4db1bb0556c54aae73b612ed8e3c9a22f62f0093594aad71f69bdb27338d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GBMJG1614659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc27c90c1dfcf5b7ea711ceb7608af5cc13f7286cf73b8fbaf4b00a8d48e3abe. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBMJG1614661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddd4a0e8d0b1c83400fd908d699d02f93e26ee9d3b417b972f113dbc71cb596. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBKPL1941814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0165c2534849d66c9842fe89f477b43b95350b60ecd2659852fdd140a01a2de7. 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/GBKPL2164793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51c31fe30f129dd74109228a1cceddfc96a13d491143b8fe60d501ac9deeb00. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBKPL2289447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cce8d68b187259a1d2066d92eb65cca73d61a8d5930cbc9b85edcfe5848190d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBKPL2285381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273acca27445df0378658ce82171294595be4ad673e87a00a7793dd65f91b606. 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/GBKPL2289448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3824c2f8dbb8833c384bc96807b2c5ee7be8e4948caf74de7c3cfb3c8d70e1. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/GBKPL2289449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed12c33b81d64e050ef8e354f5afcd6d559439a66393023c8dada873a06ec49. 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/GBKPL2289451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c4fef5c7524990972b6f85edf33466792f616446c70e4caff9137036ca8b38. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/UKW3Z2401276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4260addbaef4299807ed788adb9fcf53f68cdf069f03db10b3059d5dd9f819. 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/UKW3Z2401630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b96b6776871f5c4a0329c7d3e5164f2e43da7918076a8402cbc7ed4731dfd78. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKW3Z2402582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17522226940f935b49ca80764a187c53df3fb6871991b0fa9d7902c93847b15. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/UKW3Z2403192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8468ae7577efb73030a3fc9dedfcf695814cfab6ff8b6c843590af772328f3e6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/UKW3Z2405047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdaa4f2dfef3aee8bc721a80fe1f109c9bf40a2e7f95db98f485e9b63a595c2. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/UKW3Z2404416.
Familiarise Yourself with Your Closest Exit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a6c62b5350084dd67fb9c4bf6915da24767e5b629f2348e2315bde5e45b1c3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL2168859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a6c62b5350084dd67fb9c4bf6915da24767e5b629f2348e2315bde5e45b1c3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKPL2168859.