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 0xf31828d9b4b719e59a1d77854d204833bddeaf6c20eeebd0c72749ad89984d44. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76a747e6-03ef-4412-96d6-677ba7ef6047.json and https://artists.proofprofile.net/proofs/artist/76a747e6-03ef-4412-96d6-677ba7ef6047.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 0x35d93403153e02387df63a3c2ef9b73fa9ac53fca7c5d1be69674221e014eb44. 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/QT3FB2598915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057810d8d9389129cfdb8e5706fd9091e63f6fe3844c12480e5984837cecd658. 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/QT3FB2598914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aec7b2d81bb4347adfbed127b4a2725efdfcf5fb7b888317fad19c0d04381c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT3FB2598913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a7efae53305844def8aeab258528dcd864a2f5b5f9e475bb97b571ee28c9d8. 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/QT3FF2501397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395dfe7d836a1b0904c2ee4f202334f9b6c3dd3a102a75b7ccaa68ba77f71752. 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/QT3FF2501399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5c51e098f609b1573390ca10731859438e20de97ef932fdbb70d4abffd5377. 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/QT3FE2597669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5752b25a9f9e56cde153afe83d2773cee2e0172920ad68c6e27f267cd7116d. 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/QT6E52536779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3fc989daeb6c18d6c184eaa70099c0fc03cae49d3ef8ca1ee00f86956de227. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT6E62548627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceef6ad3a361323ffae98a693236af5a64d7fd76be431a68e7326e1f26677041. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QT6E72563575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf893df7dacdb64a17ff500351c427556d89ed8175b60a5f1a09891b0e91d9064. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:00:18Z), 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/QT6E72565950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9095ad847583f434b8301091bba0eda2e2d65a4784dd813137fac527c15408. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:32:19Z), 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/QT6E92516018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d72acbda86fd37b470025ab891b5bea8fc5d206cd723e979a986cd9fe02f94. 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/QT6E92517965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbd7df1facee089258b63db370dc8f3e3800b6fb9f2934f1d010809f27af133. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT6E92517966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc881c626a14db9a37deae0a86c4775910a70d303edaf58438977a40e042715b3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:10:41Z), 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/QT6EA2544057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5cd988364379a3166ace0619f8893ae7899ba5e83eeed8878f17ececdeb966. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:15Z), 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/QT6EC2598799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44ea06a7ad420f5d3f20d8fbd41adfba7be05ea1925b28226a382ed68bc6b3f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT6ED2500959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf852ddcd7e0baf7340d24dbcc9a04f004f07a3fd6c2c63f7796b892cb7fcfac0. 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/QT6EE2594777.