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 0xa841428cbf6e8937058ef4abbbbc7708d31036cdc0304726fa26a7902c1a7517. 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/e05f4e0a-f1e5-479f-9cd9-7ea6fd5559d6.json and https://artists.proofprofile.net/proofs/artist/e05f4e0a-f1e5-479f-9cd9-7ea6fd5559d6.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 0x0eb00b90be9cb300756ae1ab59e00eb12501d353498a395c8bcf4a4ae1b4ffe8. 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/PEDJ19900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc410fc59e1ca285bd77cf2b0ede85ef051d877499d12b1a9ba19e4862cd714. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PEDJ19900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dc22fbd68c8d906738acb1ea828464527f2544641e3bca8e482fa9ce3d5937. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PEDJ19900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dba3b2cccb2f85692f41c25bfb9734a217505f93dbb9ff5a7d6a2dfd0b93a3e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/PEDJ19900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36339dd5ccc4ab1e3b90a084d31211c24eebcf377bc97ae6012a663f6faf9b34. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/PEDJ19900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb857ff2f149f27913476ab33127843381e99e29bee33e859ddb158a5c11c1ecf. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/PEDJ19900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fed34f9b24981193c2506186dce94872b38c5859f270752cac0b94c8a15ab78. 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/PEDJ10104102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15842048862dbb3ce599af489cb822bcef6a514a50636a008815e158e7bbe37. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PEDJ10104103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794c9638a5888c9c65b8c8386e50cd6476f5612d27188d5c448a7f46c20768fa. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PEDJ10104107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabfa010d7d8ddb9b04eb6c8b880d86dbb7161eeb3f1ac80af8ddcd359c6cc00. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PEDJ10104113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed054b93bbb21eb2f89ca2f0fe87140c7f99ffcd2ebaef38e48c83b5e8c99098. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/PEDJ10515303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bb55ea59573a6ae923103b18e4548b19c184bfaa7f764314ca9c5862660f01. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PEDJ10515304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd506f5aadb3c4264a26c4e841d3025cbbcc93228b0a75cfbbd053cd983d6fe9. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PEDJ10515305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7ce303fcbc75efc93c4f091210b66703bf8d1cd996f47e7ea7ea7f6f554fa1. 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/PEDJ10515306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaece1fdc23c6448a22360018c4454c4c987d13f25d3df7f826f3065b534f6099. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/PEDJ10515308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e7ce549f9dc6414d6514f8f7d2dbf154d6ef4f58c6ea4b793f09dae7892e1a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PEDJ10515309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb43deebda5b7a3a988952885e97dc8b7f05e84ea16e5fd74052c0a5c0a1885. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/PEDJ10515312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9fd78bad6336dbebec2b9bfc8eeee218973a8bb84df162c1200185686738e4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PEDJ10515313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe7e9985220789239f7da3820918fce2bb12b15928b56b07458f4e3facb7c33. 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/PEDJ10515311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bf47f3d03dde2bf1a4d8ef7a193a2a577c4ee0a9941e61cc5c5c1a34e21791. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZNJW2148709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b514dcda0223aecbe0478fe55c76f5348c275daf807c0877e74acf1916122f. 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/QZNJV2473469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2811b6d016d566141851ca0a7995de0a3ce47a3245f1e84293c97b452ae979a3. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZZEC2436761.