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 0x2bc62859070c67178f942f7fc2f934793b72f04f4f5ba5d50c1bdcc08e9e8860. 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/818a6a5a-4966-48cb-9114-8fb36a9a70c7.json and https://artists.proofprofile.net/proofs/artist/818a6a5a-4966-48cb-9114-8fb36a9a70c7.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 0x1b3a73f08c74cd53e93b5df47c3784e61ffb396d919f9767ba140c7c3cc6e0be. 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/QZHZ52240053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ac770458ba00b5c30aacc7c2d8adc1795b16feed1dad400061ccb122b7f618. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:46:32Z), 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/QZNJV2292506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7d6ccc87020b3c64db8649a86af2dd9c2dd02246f4c5dfb34d19b509c7c31a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZNJW2288796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57276a78c1d146d7fa0a362dd098fabfbde74c03f7c048e76bba8985bab23df7. 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/QZW9K2446507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d875f2bf6f553321d9d9efa35e5b811749a6d0afb1d670a428720ba515ef359. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:44:10Z), 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/QZGLM2529518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b7fa5cfe22c18c9ff1b4804b080dc60b66ea5caf4288f8693481def1942921. 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/QZGLM2529519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cceaf8967ce56269fdd30a6cd6c6b1cbf3f38ec688b3199cf821f21bb161bb2. 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/QZGLM2529525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3e641da5caddf7ad4795382d0308fc2430cc18c66f160d268ac3555b03765b. 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/QZGLM2529528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0b94f14922eb8d22e13896ffbe6fdd134c2075b5e52dd056feb99299f3b005. 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/QZMZ92516701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72fe9686ccc3cef20677993bd6ecc0a79ca2b6747b9e5931e458ced68b0d0e5. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNJW2578719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21f8c1282ff4a038d2880f8358f42335980d3910dff52346a5bd069040eb21. 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/QZNJX2581435.