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 0x18d69079face9985f33806818845c8d7b3f52c1b7470e30644e5e2e9e95ca012. 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/b3fce0c3-4dc1-4b83-8b30-17cff05b95b2.json and https://artists.proofprofile.net/proofs/artist/b3fce0c3-4dc1-4b83-8b30-17cff05b95b2.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 0x1a7beae33665584795b676106a17777a53d7fb53df4a78c101ea5209fc693744. 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/QM2PV1893448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974bce6c9965473a1a3f422cdafed9b932c225b3174c05edd5fb403e28f045e5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:05:33Z), 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/QZES81938883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6583f7e59270e4782d3ea31a8c831396166880d2387932edfab17b003aa0c24d. 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/QZFYZ2097930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc0fc97fd73e8bbc1d1c73461cd10fd28226dab7a6e2f1f7b3595dcdf897ad0. 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/QZNWU2044793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1669ad20318ec6b2db4659a23aedbfad96d273df28afbbb489c0db7899568c1e. 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/QZDA62171079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01613d7b0ed3105659dd5d926d4a45426db526e8a1d9d269e70ff48d1eaf625b. 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/QZDA62171080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6fa28b5adf23eab0579289993794759e517ca4fed37a512493815825bb2482. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:01:48Z), 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/QZK6J2101645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23689a126cac60391c668ce2869d6a8546951c3c7bded0d4c136688e9849268. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:54:39Z), 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/QZDA42286031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf55dcebac458d6552dc176e4ae932ca90f54384db40ebb5ff4e8e1a31704495. 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/QZES92215209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8777108ec8dfdf2e7aa30ee38f3f9ab3d3b177510f1241beb09cca99a757e7d. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZES92215210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2b191f40d257580e81181f3a120767fd4de8513dedf1d8e03dcd10bf7b125d. 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/QZES92215211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11349599447e1f09d5f9ac7c5188618bfd2c1846281bdb351e268a451fe16dd9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:34Z), 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/QZES92215212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4217a35b0a0abe8c8cf96636e20bbafe6da2518319c8cccd45a1f2401f61d4b3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:24:44Z), 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/QZTB42343070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a509420de28641ff2a35152a191f325f25caed663091a9a00f4c4fa5da8dfa. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB42343066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3a9064a32c309cf4e57d7a40d87394d1cd29f4ff1f1d29f9ff453c34c77b5d. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:29:13Z), 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/QZNWT2316955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b005beb1dc4ac7d8593a90bf02aeeba50932d9db71ba8a6dd3c8bc905989540. 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/QZTAY2399399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16a0cb8070aebe0923755cedbfb23cc88a99e779504c0c5e429a74c707c7ebe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USYFZ2408316.