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 0x3bbc710eb52452dae15c7786ac4bc593a73367bf4122845e4ed0133ad346d323. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ec5c5bb-9d1e-4397-9653-c4accb37962f.json and https://artists.proofprofile.net/proofs/artist/5ec5c5bb-9d1e-4397-9653-c4accb37962f.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 0x60c2db5caced9e8e4a44f72f65922a0d0e5cf8e3b8ec6adfc594bc5d87171de6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZNWT2130000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa447ae1a61cf44e4c022b318e7183e410d933c310a5a040971580ee3e04f1365. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/QZNWY2138895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d27a7381d9661c7163cdeafe0aaf862b6cc11025c27b19c5cc288a540c38c2. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:25Z), 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/QM4TX2255025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b78a30508ab17a8407fd33b6b4729dd0b08cbd06a842af7860af3bd8916d71. 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/QMBZ92260898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef90a3b024b761c4b985da90112f503c2b2f6fde2433b77127b7ece3d71ce668. 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/QMDA62242076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7519b0a1f6993f04a6e8c8e6caae0643f686b9220c0eff8b60498de42db1b639. 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/QMDA72257231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5969e1a0929d91b7fb2f6cbd3b9183ddb86e4e130dc5d3e462ef8905981e399c. 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/QM4TW2341447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdf29fe7f6e001a550705d378790738b87b594f96bf5d095eaa18af7d14b898. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:46Z), 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/QM4TX2311227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba9aedacace98b20e9da0f30192f74024e3c4791f807a879987bb0fd55907f3. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/ES31E2303440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86cc73f87f3e4a22d94b2ca2f37a1ba961a5ded99a559d626473de29dcf60bf. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/ES31E2305405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f810404d4a9aad9d9e0c06e53c64a006af652d6d0e58dbacedb0a85f051005. 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/QM6N22437587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc364a1e25ab5d52131846acd9371b7b80c05d07675752d6a43a97efadfa6a5. 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/QM6N22437816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc364a1e25ab5d52131846acd9371b7b80c05d07675752d6a43a97efadfa6a5. 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/QM6N22437816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c2ae40b27d4ae09d5f3ea225a529a3e0e5bf8eb21f9f9144488312d037620d. 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/QM4TW2561815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b8fbd81e55f6ded8829f7d49f6e857d337a5d788ef81de25db9fc41879890f. 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/QM4TW2318657.