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 0x1da35bd65a47038efa2fae9b42423ee135a650124627d514f1a16fc3c1b5af7b. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b34f9bec-3982-45ff-9173-90ea6d84a9c6.json and https://artists.proofprofile.net/proofs/artist/b34f9bec-3982-45ff-9173-90ea6d84a9c6.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 0x71522f92842f0afe0d00171b99ec179639a7359f55849845e5a311133d7c1660. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZNJX2435525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24ef32051c1b039e463b6e2a1fc7bf331fc626060dcad6cf7759b46e04d9427. 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/QZMJX2435526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908dbcbfab08766a397136559fadd934ba82e340de8bdbcb11ae857b2262e8cf. 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/NL4CP2422797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d24c21966bf202003b9b2f0833f9073e70be5f5e6a76d7be2ac4e9e190d986. 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/AEA3A2378423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf2791ee5ea1b47c10569afe524dcf39a4c2f726752f92fba8a1ed1e29633a4. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/AEA3A2386109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeb39bad58994866c85fe87166f68a19af1faccaf4fa48e878d8de9a57ab2b6. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/AEA3A2366165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663ba3c6e175d7130f97cb77152d7a31d7d3acb08604e40b3cccebd209343b78. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXD7G2227339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b099b6d5cf917b0e817269a3d8a19c08decfb9e2ea1224c8aaa019774a2a67. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXD7G2263221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740c379619564914d474397e72f8ddd4d215d891815cad4e5bf787e810abe97d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GXD7G2217064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadaf7da421eeaf1cc41c86d85ece2bb9dcefcbcb342f064a27154d39ae78edb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GXD7G2222662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0eb3e9976cfb415d06139d9cc7cf3873992d89141cd1ff81510c5aa70d95f2. 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/GXBAV2569411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c47d596f39ce3e85918322cfe7694a5c3af364b087086b1196dfa80730aa37d. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/GXBAV2525556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2446b67bf9b733bd66b1deca1d919c71be81063b2160506601b6f3c786447990. 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/GXBAV2101590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908dbcbfab08766a397136559fadd934ba82e340de8bdbcb11ae857b2262e8cf. 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/NL4CP2422797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639c4f019e59700f3831a520ac07b9193aae430f004fa945553daa0ec4e6226e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GXBAV2173661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71522f92842f0afe0d00171b99ec179639a7359f55849845e5a311133d7c1660. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNJX2435525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c47d596f39ce3e85918322cfe7694a5c3af364b087086b1196dfa80730aa37d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GXBAV2525556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396b62571cb64c3263bd5fa3f8b85ca5bffa2207056e30aabd6b68ac57970f28. 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/GXBAV2194952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d2b020c2fdf693538b50beec68e0f048450a4b3638ff034619ed6c37defded. 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/GXBAV2117590.