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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 0x79e05875137426c41c7ce47e853c755aa5c19d7b53ccb45e8e434dafd7b50970. 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/1b6b1f0a-7e39-4583-a3a6-d302bb8db880.json and https://artists.proofprofile.net/proofs/artist/1b6b1f0a-7e39-4583-a3a6-d302bb8db880.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 0x5a3c435c7fda3203cf1bdbccabc72e5e76964acf51ed2aaeea1ad74b67ec0be1. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USTC90969107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847c157df51209937fa8966917da511effa5dff26506920392c181d56691a9cc. 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/USTC90969114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8dbc908ce287970e4059794d02e69e671388a65eb7769d03d560921098c539. 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/USTC90969356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdd845fa3983e1a6df367a2d55afd6bc9e7271243ff20993bf0706b0d922e15. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USTC90969365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9258dca4f3bb8996bef0b03f44950fa367e3e4f862b2191825be65a85c45ba. 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/USTC90969415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100176feb8fb76ab7d2a762fa232dcdd509ea7d28d359c26b40715afdad004b9. 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/USTC90969442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595b29e906bc9381c0a3eaa56dc1bd3c428d5a36de4d9931bff10d80ad326550. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USTC90969461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226e972195ba663f7e88268b928c9fcf656ce4af95cba1a58e3ad4c25d0c9c9b. 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/USTC90969896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b51e7b350a7af3bf5a58cebf0a2b2f6e7a63f61e6f3bf26b757ce27d638a611. 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/USTC90970084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3084bd0cad111076e14b0e2bcddb0e81fe58c049bee3d83b3edfa965df569b4b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USTC90970100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6526f36d1e7e569ba7c7c2a7c4b8bcc851fc94edfc8d5ebc487d4903dd8e00c0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USTC90970167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc4a6bc1e7750d5d395a8b1abde12719861414a7877abb0d57cf6d2c3fde92f. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USTC90970224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91cb42683dd6b809dbf7b3803898da851fd558237ba5de18f06c79fa2b4fe2b. 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/USTC90970733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5eebd2e5d1df57c473231d7e6821b23879747508e448a6d32b5783c6440ad3. 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/USTC90970738.
Hear Nothing/ Ain't No Feeble Bastard (Discharge)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8128b1112a303dad682e1990a6b0a7edab82bbcf66276becfa314e9780b7cb0. 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/USTC90970762.
The Punk Terrorist Anthology Vol. 2: 1986-1988
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7951ff2049ee380918a0ae844a548ae0801f5bef95a7f88be566178765ffe24. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USTCC1056215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f1c66dc120f8e3ffb98649217363e56e99bb08fbdffe97aacb180452f454a8. 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/USTCC1056216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6517ce26220a35e2e0b7cb6738c5b1ac584703d74ea27c1c44e5f924e5276a. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USTCC1056218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefddc45f32ee2edeca545e0473ef974d695ad217219a45b11f12e9fa3e96d620. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USTCC1056219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f64f0e0371e4b95acec490ae87a1148bababdaa62069c116f708035562b8467. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/USTCC1056220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb744b107056901c4d019c6c6e9e28d866fa3bcd779450e3ee7e60f749a51dac6. 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/USTCC1056229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c2c8f98ea9d9812cc2b67ade14385d83a64d6bb06e6507b3acf69c9c6ed086. 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/USTCC1056236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419ed645e102999b2b88ad6964ef7b559e2a25a9d83570945ff77722329e28ea. 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/FI7S52400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44e13c2315d20bdb6dededc27b99f23209f152bc38839dd05eef259ac54954a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FI7S52400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bc22a295b772a230aad6a5b58a1b9c0f9dfeeb6e34abc23c5ec1c1d81b6175. 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/FI7S52400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a10bbf6b20d60ca22b4eb650044151ef8dff9e8d06c925fb5d2da4206d42cb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/FI7S52400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289bb4b8e9a7d812b7dc3a8fb4d7fb5cb04f4f94105d6e73e827d73abe52d773. 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/FI7S52400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854be10690c054adbbf8e99c2fe825b97b7d66eae21e52180831b30e36a18c94. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/FI7S52400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7fec56dc051a28c88b298f651322d1a90089d7fd317bcbec38bbdc88c0c638. 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/FI7S52400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8219a9defd50973cd6d63b226bf26a62769a78e99b290b43490b11fdfc91c085. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FI7S52400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2800e7ddd622f6909c15f589cf1c6ad0fed0bf44a9115d7df83df4cb6d499a8. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/FI7S52400138.