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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 0x6020019da2cd7423539f0ca9e5652a0ee84d919633f69a9b02ca5210f1f99474. 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/70c2aca4-82f6-4f3d-a757-277312f1e52a.json and https://artists.proofprofile.net/proofs/artist/70c2aca4-82f6-4f3d-a757-277312f1e52a.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 0x9e476958b54881d789fd0d03425e94d3f3082207cfc21353157a436b499c1c03. 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/QM4TX2219117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34de263887c28e6eca120ed1a7c4785e2f09bb9166a5a1e1933a2a23f90b9cc9. 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/QM4TX2243326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee5dde5a5cd99a1053f6a154ad79c78ae60e79cde06cd80735deaae403902af. 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/QM4TX2243328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fe74f75d850681abff0a171ed0fe8ba08b260b5f5858df0e331826e4617c38. 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/QM4TX2243329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ceebca361f922d6483e6ede5a1863d4143b9f69553ca2a00de85881df33073. 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/QM4TX2243330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e80ea89dae9a170f66f75f71756f1fe060eed5e8b5b460bb162308c95b7ba9. 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/QM4TX2243331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2354b6120b071bf00ec838d24c6e9c1ee3b1e1a39a11016b1d3b05a084c22d. 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/QM4TX2243332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6690f3013982d79b56af6bdb5902451851943665bba051abf2cd5f1fafbc822. 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/QM4TX2243333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddd9eeaf38f7814d291e1ee9824b657497f2350768a47133d18424c4164bd27. 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/QM4TX2243346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb483b958b24a53e27762c6ab047f7bfc8995372d4fa7c32cb3cd299a764cb3c. 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/QM4TX2243347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53470019ecc7e71132a31d02a321b4437dfa23de73c82267ca0fa2aad71459ba. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QM4TX2243348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27696e9af4d23c3d4ac77e7bad68e190f6ff3e5c41a5a27190292c0ab705572a. 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/QM4TX2235632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5941f6ba55cfecf4a22e4847b3b7152633b9ca3cff5a8c9638941e1dabd13a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM4TX2243350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9093c6b9b51043a4a3eac2e85184be82fdd409df3f7216d18a38fedd05384573. 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/QM4TX2243351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb476369471c48ff78112f5bc4330aad68dac41d417af4fd90f342f0c11c4fad. 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/QM4TX2243352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296821c173eb30f35e7f3c44ebcec9a44b2cbe781e407ebcdd843f5b58438dd8. 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/QM4TX2243353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20057be19d1e2ac701c41d30950516e669daa0c6bd6b18c074e3bb3878e3235b. 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/QM4TX2243354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6ae87d394832c6a3a9f7bf990beb910805e53b90a61e2352eaabec122f6cd6. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QM4TX2243355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75fc9509c81d5da87ad1e6d350f76489b8ca2fab94b7674933afe867bdcd4ae. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM4TX2243356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeddb532cef874ab6f268d78905bc29fd4659474fd83e7bd4bf9796c345389cc. 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/QM4TX2243357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430b07589ef59c45e1c55dbe60d18e4b3e47904ea19b488c59af4c9deeaf7227. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM4TX2243358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13601d673a83b95f1aff0f6908ffd56dfb3a75e8dfc4c202fe1108a7d1cf1eb8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM4TX2243359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fdab4db58bd6c6a16ebb7032b17f6fc5c495881f56df505b3671d1d286cbf1. 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/QM6P42444821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36a97cddc9a81f0d79e162a930c4f9bf50642de12dfd660709b675855f36add. 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/QM6P42416290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747c1a0efa2208856aaac5ef07ffea7313a6a672b95765ce1fce80ee108df442. 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/QM6N22445796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca441b865cfaad865bd09a410311366bbc7a4a3f45250ad7f4c5266dda444ec8. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM4TX2447367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b27d8e8b7382d2867c3599f91844880fb8e1110ace87677f3e5ed453ec268d. 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/QM4TW2455863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54c0e243af72ca55795d36b4978e1ac1239cdf787d098b840e8cd045465a988. 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/QMFMF2324881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eabcc0a146013b57fc06e7fd6b3577255a2b74bac1b50d351f29c78b5456f52. 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/QMFMF2324879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212612deedf264c583a640a6bab1e567bf37ef2d8c2526dcabd39935fac57ffb. 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/QMFMF2324857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3c0ddfa5aee059afae59421766db6a7c49e2aa796fdab0e5c7f4a9490b6294. 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/QMBZ92343912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92df2591fdb0b4e9864a6c9a6012013a146af33d472a8a736160690ad26d6dd8. 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/QM7282355241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71af080021fdbb679ca00c400b9bf55706ccdc1ee838374bbe41fae93fff6d3. 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/QM6P42309201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92df2591fdb0b4e9864a6c9a6012013a146af33d472a8a736160690ad26d6dd8. 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/QM7282355241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71af080021fdbb679ca00c400b9bf55706ccdc1ee838374bbe41fae93fff6d3. 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/QM6P42309201.