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 0x4425970160a56f28bd3080fb86ef897c8df442e760bd5932e6b42b1076451859. 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/bd6cb235-84cd-49fe-9cc6-e66f46284a44.json and https://artists.proofprofile.net/proofs/artist/bd6cb235-84cd-49fe-9cc6-e66f46284a44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xe192ea5b88c49383ce3a8cd00826d8e6328f5c3d35325645b0990287978561fb. 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/GB6LT2200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb1ce46d75c7f9f166981fda7a39a74283ee5909a260626e8bf97b13cbb15a8. 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/GB6LT2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b587abd67fa7d7bd5de8431933caf613dfe5c0f4ca5b14d0d4ec54f486bf25d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GB6LT2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d3a30ec549d06d1d2b88206cd5b8d62e34afdbffb2ba21c1a1e20e3d27e915. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GB6LT2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c0b977d38406120dddb143c9c0974fdbc04f78ece455da6e855e8d02c47236. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GB6LT2304092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8823b511db56346da242d2045599a774f95c5a3caaf6d0597959154093a6135b. 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/GB6LT2307089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3b1ab4622c4dbfb30d5fc4482b84aebebb88c34f53be14850c6b54d633a933. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GB6LT2400473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1172dfd72cc4cd5387dedfac4d543bebc12a8d73b84aa2692d59186ed3874ab8. 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/GB6LT2400649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf7dfeeac30e9553cc9ab80bfc1d95d23e80f93d8c7d5e49fb251efc26bbc3d. 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/GB6LT2400661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347212a3b1009e8bbe8d2376a5372ea0b51e5758419a4d4985878b46fbdac055. 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/GB6LT2400770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbf9872eb43ab67b4c7cec30598101ab67c0f0b4d14bba302dc71fdf10ffd71. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB6LT2400843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03b765f4b75a29a5afbd0824cb3f43a8e242368f3e249108fd3c415bfc49030. 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/GB6LT2400863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d96f6fabcc2ede85355f53e0080f7ecd60ab80b181fe22e638834db0a979e86. 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/GB6LT2400868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954d7d0be33acabd94ba7bbafdc45d8f17d5a4df1ebb3a47ee2f5cf5ccf70ac8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GB6LT2400932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbed2d2d749409a7d87d285ea2ac38d1cd6c14dcfeda7a6a3259031f122e3d37. 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/GB6LT2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11078677bceb8e5cd9ed9741854ef64ead2308f7b342aff0df11836a3803f28f. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GB6LT2500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494af979857f9a1d50fd1895358b598ea813d237c6619b5efe576729dd652c2f. 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/GB6LT2500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02676c5826938211bb6468694704cf2cdcf157801032d831b152b3cf2934a81b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GB6LT2500333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19872b371ba7da158f3cb585cd36b1b52aa987a934bbb006a9ab215850df8036. 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/GB6LT2500388.