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 0x63660f0ac26b119f1bbd1ec87cd45e9df36c0c88e4b4d0096a46c927e5c3a53b. 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/5f2ec6ea-0554-4f7b-bb92-54b0ef379e28.json and https://artists.proofprofile.net/proofs/artist/5f2ec6ea-0554-4f7b-bb92-54b0ef379e28.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 0xb447b5b2b332288c33a568ee04f436f3e157b9c50d9ad68202830a47125bca75. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEW2029802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f478e6b6f341fd542ab58a0636f2924294d8a21da2256f192af932ea86effa1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:52:54Z), 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/TCAFG2054832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce4dd4f51f52ba05eb5cfcc87aeafe26a9025be8e5ba6e2a066f307d9e810ff. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:52Z), 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/TCAFW2102307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b4b10fa8bf9aa871e22cf35accb7bcfed67b6d598f8bae421aae87211df017. 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/TCAGH2251605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26440eff086c2ce5c3fdc46a347ab04ac36f808ac0789c379758485e3c7afdf4. 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/DEVY82300411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ad07d4915b9fa081c6a5c9f6aef87ac9e65556b9f6151f17d6a1285621ce64. 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/DEVY82400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e3c97e25629934cd3a2ff28517ec95b4b6f4fd189f1078d1377da769dc31ea. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEVY82400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9c3ba8fea72821e91364e743fe546ed9cd04c49ac21f587f17ed32ebeb9f6a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEVY82400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee699114c621c694fd26e0164a190ee120efde72ab94794650c75a1d69dcadb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEVY82400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1cbf5020b937ead785412d92fd9e22bfe98ccb28ebb9e2440096de4e0f64ca. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEVY82400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ad07d4915b9fa081c6a5c9f6aef87ac9e65556b9f6151f17d6a1285621ce64. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEVY82400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3b1bc3e6344f88da1d5e3115abce5335ef4b2bee5a5c49c4690803dc538415. 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/DEVY82400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da136a4e754b9a81f35d43696432e8b4cb858598aebecc1f1e1ae9568891701. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEVY82400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bb2a190b9f2508ed60a5060695d894e1fba6c3d91d029e91891384a6bb5b3b. 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/QZWFG2358904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dec209b4a05f27b1bf79e892c925ee264ba9779b3d6679bf9e1e7b4f66bf7d9. 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/DEVY82400031.