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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca9452d087f0aec0087038277dd59ffdadcbb5146a4c2519932963bb1e7de9a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acddd529-2f40-4a0f-a765-92175ab3ba4f.json and https://artists.proofprofile.net/proofs/artist/acddd529-2f40-4a0f-a765-92175ab3ba4f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad462799c3c37e05bf7229f4524127ca1284a21d637b8089d280ee6a11db37d9. 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/ARQIW2503606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16eb7b1bef6d326a0586899e6ae008e09f0dedf4e8b9883a91dd937195361e73. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/ARQIW2503614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7506e8489ffd5791cc7705852be07811083c0d06615e4901630877c93d1ea7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ARQIW2503610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d351c0bf34b342505f6f0c9b5ca1a16e6bb32bcf895f11fede22487650ddee. 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/ARQIW2503616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fc03b6fae37d8e41eef5e0456a9773f31d4e996b41cea22d761b946cccdd59. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:16Z), 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/ARQIW2503612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947208d346be9ab928c015d9ea0495f361771df5ef710f4ebf068d4d63ac196e. 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/ARQIW2503609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab7b4a346c009ae5d469914d390342345c7089ebe01999741cc10d836f8fde9. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:56:39Z), 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/ARQIW2503603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1cac48f0bf77a0d903e81e8c97976a74e4c63520142a5605e5ca340193a964. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:05:00Z), 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/ARQIW2503615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77643760c651af3886379f687ad4c186a1aa3ccc1dbbec3e95c616358420889. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:32:32Z), 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/ARQIW2503621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca313dfc808fbaf08b1f5f0956ab995d0c89dc0dae92f7b6738064dd14eec80. 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/ARQIW2503605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3130658cb848249e843e83e7319c7292e0b8d2eb42cb188efcf4841c28e0ce. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:59:32Z), 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/ARQIW2503618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9ef5a3a8409d29965f276e4eae300a2c1abf7d2221ded6885ffbff6d4b0411. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/ARQIW2503617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e05a36664ad0fecf0c9c1171c8e644eeed62bf1186c19e4154647857d57a7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ARQIW2503613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68e334896eee522b292230b51699fbd4d77da628cd58167ce64c16ae1ae1eb2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ARQIW2503604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205d179ac1364fbdf1dec42f3a3ceaf86f2a4be7149e3390e4fc83a49aeab820. 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/ARQIW2503620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20059fa86dd8a64261c96d99c4e7ce36b8d70c89aa180648bc34bedac82c9ada. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:08:51Z), 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/ARQIW2503608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a50c74d91849bd927435740a0224cb9305791002bcdbbeea6de001702ccd1f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:53:27Z), 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/ARQIW2503644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775afcbd2544c808a7ae637d544502b48bcd3ea10ef3caa671cec5d4d13ad17e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ARQIW2503602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3718ebc7caba227e1274f262c2db5f467b949f74f1330ab49fd11769644d6c61. 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/ARQIW2503622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d61ee7d0b034725e6492f4c290d8ba18eddbc11ca7f0aa1c7e88642dbe9f74. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ARQIW2503607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403ecfa3bd2368324aa973b4eaef30514be3f0d8097e77240ab34e0d8aa5bd17. 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/ARQIW2503619.