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 0xe49922a1220e974b0cb2b8de507ca0e56675b4e47c29d378241ba57545d71b70. 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/8d950835-730b-4a1a-b435-9a0e1c761a80.json and https://artists.proofprofile.net/proofs/artist/8d950835-730b-4a1a-b435-9a0e1c761a80.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 0x09b1c31373706805c6b20fb0f1c25dd3db9e95771ddd2d82abc573bff4bbd167. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHNA2060331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8ba4228b95929557ad66d47da6b12283a384639e41d3375ea8c1be2cb5e6b5. 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/QZHN82282161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b5e0afa79d957a16a73c9ff04462adda0d497869d35cb86ca7da6920c42b65. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:30:09Z), 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/QZHN82282163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff859a752c00d7e8ae93d97b83414dfa5800e36702c14154c353070b48464e3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN82282165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df2420759f17c75e628b7f425364a10a627f64fa2e24c8f0f1753fd337a43d0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHN82282175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c50e045418b90562e372bb16bd6ff5be31252cf2ce52be20d4100cc186f2181. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:55Z), 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/QMFME2329009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8e058cc31cabe97b852628ad776cc9dbedcdc3205cf2fc51c73bd8f0e9e73b. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QMFME2329010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cc0181956fb447745d87bdae0fdf7a0f752dfebcc4be4dc4cbb0b9c37ffc44. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMFME2329011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc89c8a6d1d6598c21ed75feaf2f114bcd6ff53d4c9850db2ff08d2f28d2e75d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMFME2329012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c93d0a4af57ae416627417ddf9f06c93190f8556d8940b44a36ecfb2689c92. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QMFME2329013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde592c91853db2efbea89727fda37ddc4d42452d7294485de3eb734e964232c5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFME2329015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cdc0a2c13e16233256bd422aff2c0c95ac5f00384da7395611d5c0956f31e1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMFME2329016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef36165f44024575cba9547adef70f8d83debd8f6c1c74a95ddba2485d2ccf7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMDA72344981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3251b0ed70b4323ed8626c95ad01006d1e4cda50c2d255e3a3125900981652bf. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:31:01Z), 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/QMFME2329019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f412fa9c777bb03edb36dfeff0e4c4380e94496bbe53342ffd54a39326b163e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QMBZ92348337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4e9ada89a46d33b61d93fba55b157621959b2a6325dbf84d1e76be4ff93d9f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:21:18Z), 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/QMFME2329021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1e1e5eadb4faeab369e3d2a22787832e2611bfca4069c97359b7652d1ea6ed. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:27Z), 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/QMFME2329022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a0b9c4a229e5cabcc472f8517fbf3eb5f903a44ffa7613248a4c663c672cb3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFME2329023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cf8d7d96534fcde7f097ed1bf5eb0af76521e6a79c46e6bae030b83e591184. 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/QMFME2329025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43983d5a01eabe7a31a27b5cc11728472d65534b89773e306826971ad75ad673. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:06:03Z), 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/QZZ772497970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1131352feb905f3beb1213e7756a12aaa2f326d073719bebef584c0ae4834dc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ792425718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43983d5a01eabe7a31a27b5cc11728472d65534b89773e306826971ad75ad673. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZZ772497970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ed9845f1734763ddfdc5c6938770d6ad7e8205fa4c328e0b73ee9636384170. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:39:10Z), 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/QZZ792425719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5c0335a2a6e4266f3a156adb0b9ab32abf6fd754d6a1601fa3a4ebdb37eff6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZ792425720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2bff6f1224bb2189ff795410b15ab2d97fa79e0e64d1a0df1f99a07758b413. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ792425721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bec50780aae62e5b34c9e8eb0e2feb0feb20a887eec8a75008fd9e7031376e8. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:39Z), 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/QZNWU2543672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf947deaa1fe101a80fd07d3e3c3a8aab2636bd03a64417be06df7e117b3f515f. 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/QM4TX2426713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226650584931d51a69fded8a122dccdb3dc37b21812cd7fdfc63c0ce4812e746. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZMEP2260671.
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 0x8b4dfc1141942f7680b745542efbc308dd2d738ca08473514a7f4a4748af6786. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZHZ52218779.