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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 0xff5a46ab7852e5f2c60ac388c2cd94ace78f94aa9a7dd2ee6bafdb8df4ff11b0. 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/b3a5896b-1094-4c39-bb4b-811d4636b739.json and https://artists.proofprofile.net/proofs/artist/b3a5896b-1094-4c39-bb4b-811d4636b739.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 0xb91367e0bcd3bba2e2dc937248a0fbfcae5f581da7f8746a69fc7d92c03d5e27. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USHM81624395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531c6fb93e348e5b1d7b5964aa6edbbc40f5a56c2088fb2f6ba275b8824bc4d9. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USHM81624399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36829032f929d88ccd4e88ab6536a5201ee1ae9e6aace710f076168f25232c75. 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/USCGJ1876226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8f733526eaa5df73ddabd8f32ce93ed28a3f32040441d2c56992fe46fda035. 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/USANG2023198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c23d270ce8139ff9bd0a0d4f1e134c6861726ebdecc71836f5027c1eab4186. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/USANG2079098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6d79afb97072685da2e269579b1bda006ce877a4e2a23482da133a5c8bc661. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/US3DF2049785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e76cc68418699efa90f59ae6d64d0a6a90e6ede07661a89cc6cad27d86e025. 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/US3DF2049786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c40c8de99ffb9ce42fcf350bf792f4fc6dea130eee2a718f64f0deeeb25cbe3. 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/US3DF2049789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a77418d59360decc770dd7ca2b2464b39ca6f38b1c2d5c160be5ac66ab73efb. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/US3DF2049790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed8febe949735c903e26b6c3c3d060873c7396e9995e0f954d7f7159b8d8068. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/US3DF2049791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0edd7c1c6148d631cd45d8b9b965fa8feb3634a7481a1b05cc5907ec528aad. 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/USANG2189658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6d9629f0e848d867ec20fafb05e415915f701d8487cc69d53c97427b5f2718. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USANG2194757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0edd7c1c6148d631cd45d8b9b965fa8feb3634a7481a1b05cc5907ec528aad. 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/USANG2189658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa062546b24bfdc67cafd87198949e46b86e0b58d4301ba500c2697c4b162b47c. 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/DEQ022116174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e14a735cba8c62f4f939ab1804e5612d008215f6a95f92dcbc46c519bff582. 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/TCAFW2163274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1959f16f789b63886a50b4f2a58e7d6e7a7db095525bc32e39aa88b916b71acb. 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/US3DF2214306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262553ad94a0c2bcc5bb3de8831b2507504034d18adbebc827c3f987df2ff29d. 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/QM3DF2197651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37514ffbf3b78c81e3745072eb94b7f5388f59e2b38ac09905259b1d218fd39. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/US3DF2286206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f32336fbc7dea4e59043b241f2d379add8baec36d21b7b985ff724efdd114bd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USANG2237567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99372b0290f30d689ce7ce05bd52857ccfaf0879c077a4fc1ae31cb449bb1355. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USANG2237570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b78bea6339e6851e6e95bcdc0bd277ed1bd384d866882af8328dcbbcc462997. 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/USANG2232514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bbc0e0ff8aeb948b98e52577c989d3c9a24ca8ba118739b9f57ff64d5768e1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USANG2237583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb6ee5c58309b090ba632ac672073e36eaf17297a1bfa60174df5680bdd26d3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USANG2214307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cda0d7d9d539bf95cdeaed12419ed78e30d778282f7a4879772096d71e6e2f6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM3DF2220144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e16b10c98abbede4b6d07ffdfb80058718dca08f3b3644700b1852378cfefc. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/US3DF2410943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f6cbb92e125e5d47db1117ad36cb9a58b53a144becc2e6f4682a36d82e84cd. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/QM3DF2422876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d11d6827ea8f2a5265434bf318dcfeaf695e46f64dbd464725b4bb082f91214. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QM3DF2422882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293e4998a73bf4a2814a60611c4c113338fd6441946ac9aa103301dc2e703a96. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QM3DF2422888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7b5ff420e42deb64f074241767df17a906c16af953922fa663da4a8f1ad9ac. 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/US3DF2522816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e4032f81b8b87239889c389c5bafff65d74f9a1145e7c61ced648600cfc5fb. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/US3DF2556240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710cc696f2d7f5284809cd9244768211ebccb4e1fcb0538720b8b618626ac852. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US3DF2556242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa422dbcd3649cf1455a67bce71737cbb01f076d16cae9519fa50b999c5d4843f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/US3DF2556243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab20d40380beada474f2a3784219e8a6ba4a504478fb70d0292e0e5bf60906b5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USANG2521494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecf27f692d615549fae16643082dcd883e8158f20852e663d9f287c153eacb4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3DF2486004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4510711db7f89d2736b7a85d7c2144c85d4e1c7f9314e752acdcdaafd584ac06. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USUG12103219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f15b7ee7bc3a5706da7859364202da3abf7079b4a0d93ef6c382f7ae479a42d. 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/DEQ022105879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccecbb1504c29bad8c43c9a607a701ce082cb23bc8fb4afac8970a3d3e6246a4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USANG2214319.