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 0x2f9b38d15d321fa0e62c4287aa81b9be37a61dac194cad808772a70c955e456e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f07f59ef-01e6-4968-9c9d-a8d1454cdcfa.json and https://artists.proofprofile.net/proofs/artist/f07f59ef-01e6-4968-9c9d-a8d1454cdcfa.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 0x8e4c62ab25b48ee074808d544d1794120c8538d815690992c42ae1bad43dfcf7. 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/FR10S1453543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd3ce79a8234a4474c72ffe58513c31191c510eee49e913bd31eb94a0411e09. 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/FR10S1479242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d333ccb78382bcb2150161204942a181c5ebadae3b003ac7a5b9ab0f40e688. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR10S1479243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffc3fda946c0505f478adff6f319fad287883826e6c4bdbb693cc5bef81128b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:53Z), 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/FR10S1479249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7efe9f9a939f4b08bf14e81f0db24f1f7c167d8ffc8d93354b3213f7428ccb. 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/DETX51600345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120b897eecb4cfdb43727d7fc3c95157a807f47352e8961a55611bee88417a1d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DETX51600346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad0dadf2f805e089007d0259d2e03250507df07b69134e93ebf58d83b4db26e. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:56:10Z), 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/DETX51600347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bd50fe4bdb2340698f8225f20de5a246bf2957b9d705ab10171bbab135494b. 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/DETX51800513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680b3183218f1cb8cb5910598cb05420588c18c2c81468d0e5a79f30d51e3060. 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/DETX51800518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9254daee104c92c5854b76b4eb589bfd8cac9221c02829f5e085b898c57c6aa. 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/DETX51800519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911decaa4c2813142002f064d743e1b9e407d1b6c36d862fcb5ff73f2427dba4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:34:44Z), 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/DGA072286305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af0e1ce7a27d5abaa37d2afc29a42871fc88051cd6c37570b3ea8ee3f8b7c4c. 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/DETX52300231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1d4d4dc8cb433d54234e4d1bf5343be8a9b097320363c415e7aeb75e97a876. 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/DETX52300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018902041e4b6304315712a8f6dabfa443480ac82e9ed6183671369c719f5f3a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DETX52300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f288756af9e7b215d0bfb242c0d885a5acdd020c9032a4fe06829d8a37fc7f4. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/DGA0R2458832.