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 0xe90ba9db1ef634da1a4800ceb18c1592b44f5a79f0c8ac4321723cd8fd9ce211. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1553ee62-1bcf-43bc-8a43-0189923e9b9c.json and https://artists.proofprofile.net/proofs/artist/1553ee62-1bcf-43bc-8a43-0189923e9b9c.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 0xf6c62084d9c914592d887b61fb6c550809c59ee91618d95e7745463e7193500a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ2J21506832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0cd4d046abf1c29627482809c96dfe0df82176ea7da70986060e397e0c3f93. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ2J21506833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0de22310fb84bdc83074f1b6cb38a3661f63aaa788b668fc75f4c4d860f371c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ2J21505954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c8252a6b4c734f4e14142d2757ef282bf639cafe9ffd0817e7ccd585bcdbfc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ2J21505683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344db839eed81803eaf3826895bc06f3b85e76d788a7b764d998be9a01f82e00. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ2J21506430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905cbb0cc3a567a15d823b8a4daff3adebf868ef46f38777790e2d6db710025e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ2J21506272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94731c868d857bf50f26076cec17f4bbf1128f7e78b4419afdfc9cc8f19a45d3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ2J21506622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf3e21c25aa72a7ae577f2ce24ed6c9927114bf45ebe24f22f3ea669053eaf6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ32279383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d9eaed7fc597c016b2f30b31a49f8de12bb16b0ae3a6becbb70940e8f82939. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ32279384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8aac2b60290d79879b5202be6773fc2e20405ad36a86c4f23b052808e40dfd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ32279385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e9cdcb9963b62e9e144641c7b77ad01d0cf33d18cafa7cb5b9e0cf3d229dc5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFZ32279388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803e78e8e5729cafde8224f992d8b7e7e2eb2b72ba4c0fe15f360470ec0cb0fe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ32279389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e91b7f3bebe7dd7bdbefcbff5eda7db15e0e1df002607aee569c652d5415d0d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZFZ32279387.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f23a2bb58437e64b7a28e7f22553aaac26a6157a320ed7fb2482172ac11a37. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN52116735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a7e2fd3cdebc0e011d381774ff29d6c9496eadab043b637a9aa4accab65be4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA62148816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4225185ee6155864923d7c38c22352442f1134467e6924b6844a1218f518a1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN52116738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768b0a378254bf57142beca536b5b05bfb1242103b635a35700f74a3a3f89955. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN52116743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356c11014cf0f0a1973d9b2c54d234fbef472811aaca4294bf52abe76e201692. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN52116748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc422cdffb6018bebbb403ab213c64b4f1c4afd277bb1d3751a1c8e4c52afe817. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN52116750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522b727979fdeb94d65eac8c3851f0114df2beea86bd6611dca5f7309323da57. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZHN52116741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb74abe01475046a1484c58a4f9786468849d608afe4e87021f99ab42d42bd63. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPLS2287812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8cb876889431b015eebf3ae9c88079358c130c15f886ad804151883477059b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZMEM2258782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6a2fc75ad85841d563c6168e42406c4a02b50a1c7b1b544dfe0c207790b498. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZPLS2287816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d3608578a9dde79dcdd84b957ffd76a7bca45df5fac41c57a26ae1deedabd4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEM2394345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec6e01cbc2e211b2b31ae0fc92f33386736676cb145472ba188c3facb46680e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN52100795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4832f4eb9be98844c26c7d5db989790838885799a92af997216abdb2ab8add0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZES62145262.