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 0x8845fe72ae9d0d5262f6e6ca9417fb5b798733fd9956a2acdb8b0d1242ed1893. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0d72727-9024-48ef-8940-133dead0077a.json and https://artists.proofprofile.net/proofs/artist/e0d72727-9024-48ef-8940-133dead0077a.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 0x8aee6b4d26eee8686f9bd397c39deb69bc8d2a48e8fab99c14e6a56fd095dfeb. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/PEIK11717001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b773278964f7bad568f1dc2b36b842a4aaa5a41c576a314111a02bca3034d4. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/PEIK11717002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3e1bc7e9ec20adba7453cfc937a308379fcc5b9fefe92090d1f0467615227e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/PEIK11717003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c717f6155cc84078810b0650dac10b80625f7ebb838de82fa024ae87376c9b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PEIK11717004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09b0cd3649e87396a346a34efb7a63ee4a4e1e16b5f7acf819f7aa0375b4041. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/PEIK11717006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4212a749af02ceb55db28ae68ffbb0321e9860a3e1986d294b76cdf80f25aaa. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:05Z), 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/PEIK11717007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8384a805da000be497ffc8d5c135bb49477328ee9e86f81c8fed7567289f26d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PEIK11717008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137e851c4e893690677469a9bbdbf3ff1a039415e755be2ccf33454e3e40b907. 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/PEIK11717012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61711e86d3c9fdef616e13b9d99bab5dac9e6dd976b952f8f98a7ae7d38bcc8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:04:48Z), 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/PEIK12001152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daec331200c12dbfb7d4c6c3b368e3de80a80c97e21fbb28e3e9f0979410840. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:42:15Z), 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/PEIK12001156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142c2b8ac6fd00162e7a01fd8009f925509bc73f61cb4bb82e565cfe74ace17b. 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/PEIK12001158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4524d6033bb19a52a6c2bcb5ed4c9f079ef7f74a1c08271a9a180c277ecf6d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZW9L2430498.