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 0x6018ed29e48797381e2fcd1cc24d79a95ba0a945b7f56f4c164c13a025a48775. 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/35602ab9-02c1-439c-89f9-736ce974e033.json and https://artists.proofprofile.net/proofs/artist/35602ab9-02c1-439c-89f9-736ce974e033.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 0x5511f5feaa42e4f78e3a63419cb456f2861f5524b9f35767711df9658e76fd5d. 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/QZWDD2455375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a25d8159b221d5b4f9404a47223f83bde8e5fdf14c8c9fde5660b2884d74d5c. 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/QZTRX2363554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b292d39e56a02d25b1613cd5c0400ea63fa20f243f80deeddd6f139d453c7cf. 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/GBWUL2306012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe412cbeb0ac4be934a3c380468490d82e5d73a911e743090c7d02cc880ae273e. 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/GBWUL2340593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4c1e4e9468e18ae2f70e69ae89e327f48495bfe9ad9e34d346df7b5aa29a19. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USLZJ2307084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad572fbf2b8f3ceec96199b037bd465d4884df0acd1f128b29f6f4af6ea1950. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2502048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccf65955d8903c84ab6c58be44cd6829c2d680a0d9d3d266a193ef8d8877532. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2501994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3c1d2f6546bb3b4005bb1b85e3a65fe0341e8508dd23de467c68dbdf10aa7a. 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/UKZGC2501686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05adf8b1e8aeb737b24c7b3e0caaaefb315dffe2beaf3fad94c9cefd343a5072. 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/UKZGC2501647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3aa66a62010995adaab479e175d5b6b3fdf3743852bd795e37eaa7a578a0fa. 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/QM4TW2599448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c78ffbfca9e012d29affacbd4354eb03f8f6f653c590430bea3aaa28867c69f. 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/QZFZ32523153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe493a7a6c72c355dd2b2b970ac3decc257c0c61015e1ba514ea7b453f03d1f33. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2583828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542fb93e049e604c8d97fe909b3ec6a499842d938ceef782665a3ed13ef0db52. 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/UKZGC2500845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb133781a5bd75504b10be0244d06da4e4e2899282a55e073279f700e6b8b85. 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/UKZGC2500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4ceda754e2d5b00bbf9540aab6ca2985f510e4fc66d0215d2f7a32ee6b0e52. 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/UKZGC2500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb757ac522128f46b169e69d4584dd242f39309d78c9ca30f36f483a76c483d3b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUGBT2437864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1632506724fc2463a61e2906494537a041a6f467b6ae8d029ff775d3f7fa22. 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/AUGBT2437862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ead76efc602b0ba057ade78f3112286570ba33a0ebbe93d58cd2f25ff7bd8e0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUGBT2437873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaee9ddefa31568dc700a3dddb8b565c79bb4a54cc385266a6dfbd53c1a46523. 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/AUMEV2466384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38639957f8c0e382a3bbfc057142fa2efb440807615f1117fcbe28729c10b259. 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/QZMEQ2473118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969677e6f1f44f2cd3056a98da1f01c3bc51d0bf834b6d187112573a19603344. 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/QZMEQ2473121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02217e4ccacb73512750b8f547443de42773c2fa64625ea86a73f76a0ece3b51. 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/GX8LE2493092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe163922d52638f710322782f8fcc16eb48d2a8715fefb32b949d3176950b8fa3. 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/QZPEW2437644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ebc65448deb412b86d6d557a0371a9e53e22ad1d4b4cd3482fa576896ca98b. 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/AUMEV2427811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55c2d89d178cb00f7eadb746c6b206fe4605d8910cc1a557dfa761e7a3bfb7a. 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/QZES52472063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb405ffffe425d6b8de8dee3014b1e302fd749de43ab58600e8c7f80df9f1b1b7. 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/UKZGC2504688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c86bad6dc107af87a60c70d7968e6a7dc81bf76748214b2b7d297c6ac500576. 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/UKZGC2503772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49a10eefd725a3c2467d1b80affd25c057aa580f96d6ca3c1556a28b1f9afa5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2503768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73ac5f72e8177619df3fe5b92e8a57407117ed1793779d681f427f408c326db. 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/NOA9C2505030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a78f453600d5614c57ce2ed32e136048903f02c29a0182afe0203835b0419c5. 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/MGQ002015652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834aa29115584dd75e6a9baa583371625f0c7a7f880686ec0ba853fb66398956. 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/UKZGC2501710.