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 0xe22ceeaad9d5283762e3a22b4bec3929b05b0d753c22b015c080d5e908cbf55b. 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/f6f0657f-3609-4ed4-bbab-d2da6c5edfaa.json and https://artists.proofprofile.net/proofs/artist/f6f0657f-3609-4ed4-bbab-d2da6c5edfaa.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 0x52fc8dfc70e5685deead2268179622224cddb980cd8e43a3370ed670f8f81cda. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBC2344165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee534a82da57b95d20658dd76fa83963ed654a8ab576b07a065b19249a81c073. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZTBC2344166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cba2a88a24721bae425441b26e30462e21ba16983b3f19e08d6098933d3f4be. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBC2344167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae93ffddc93f1fa2dbd03e873880f85d58f8a8ab6a3223d86c11e5c7aae043. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:25:32Z), 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/QZTBC2344168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3020d6a1ac3dfd0f731e3a6f2466524cbfd06bc7553a3fdf85bcf8f9115781. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBC2344169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105ee5c8da39702d746381b0764434b67893c8902b55a44dbe1f46578687f2f0. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTBC2344170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f711c388b4e2a7706a4169b9fb121ca2e24c79a43647f577d1db2b4f69b929. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTBC2344171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4fe8833a3623bbf76dbdbd8958ae5fee7c323fb4cfce0f6ec9a2bdbda59ec1. 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/QZTBC2344172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe2dce1a3f813e83dda1109ebfc7bae07683e67f30c5c5fcf6502b1cca72c03. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBC2344173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208d9de57f259450e2b1006acc712b55bce5d16e0393ef875ccdffbcf1b82998. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTBC2344175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49878c628480b8d50cbf591c991f31a1320cf78e822dc82db11c751953d39038. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T11:05:45Z), 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/QZTBC2344176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc105cdc4fdf908b496d1d4ab1e2d248094075aed194af78367cc4bb8a2dbd6c. 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/QZTBC2344177.