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 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 0x4058186093d85f981f4c1d052d69d04c3934f716cc1518f1cc03eef49d2ab263. 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/517c5de7-4153-42f8-be77-66e1d4e7f895.json and https://artists.proofprofile.net/proofs/artist/517c5de7-4153-42f8-be77-66e1d4e7f895.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 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 0x072c28fa7fbb7b0c88dc8d1e703ac123217fc3568210f0e0d65f57c550a3a73e. 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/BRYID1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19fd668605363d3e4c2cc09c54c62fd2555d437031e1c43d9a8a72944ba96cb. 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/BRYID1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694801d214012f3a9123cec572f3bbbfaa365436bf3e7e0fc4b2bf394f6ce1f0. 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/BRYID1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9464312aa66d23b8a0abc2d70ed4aac1cfef86530e99f0cd7292f492f4820ee. 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/BRYID1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279d2b958e70e88c1f0719ab34e6258591139f3b8f722afc8dcb8456b7bcb087. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BKU822400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140546c2435095ee6ae0d446a30fe3fb49aace112d4a8c390cc54545a25f715b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/BKU822400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf95972d6cefa45267483b5f6177acc5a3ba331a16b399b6673cb2e629663f57. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/BKU822400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5f2dcb52c9204f4ec0721cef8efeba8bdcca1a69f9eae565271bf432c5220e. 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/BKU822400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24a523bf00d96d2a352e83a32f2a720dc94e42e0ab3cd263b20ab9eeb1dff8e. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZW9L2474043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba41346e40ba7688069626d29d8d417b38f458be86ab3ad9109a424d647d4eef. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/BKU822400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4840239aed988271c048e714c36983422ee1e5f7888ca18a14333cc5cf36077. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/BKU822400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fcb175c1e51db8a6d4037b5c3d5e71c70eac900d70acec9b49ba9fdaa5c03b. 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/BKU822400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f32835db2a1a4f2587d7a9aefbf0c0eac7ec6a1a39dbc13b3c9cd3e3ad8d20. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BKU822400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a41a4f1409fb471b5c826845a100b81c2a64bd4d22aacfa18f33da76f4f54cd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/BKU822400044.