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 0x01a6509d743298c4ee3aa4162bb61f03de331969f6ddc23cdfc576e2e88c87ff. 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/358e2cce-90e2-4d3a-9da0-a8fdddd80947.json and https://artists.proofprofile.net/proofs/artist/358e2cce-90e2-4d3a-9da0-a8fdddd80947.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 0x37e92a6b5687263133f06f7658b7de187469d016ac7868cabc35a8add0a0c440. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFYW2128389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863ddf42b3e546953a5dedd04856fae13892b6d4dde0b3876dc952e14e51783d. 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/QZFYW2128390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd78105ce5b17ce1f3e3f95ce57d8d05e02857f16f8323192918e8cbb89cd8bc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYW2128391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc644cf3c627e96db9a8c89af461b7372a70bc4c268675f9ee2cd1c0cf4b7f444. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZFYW2128393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c36caf5af0efbfeb43a9a6a3b9695a530e3ed2b7cdccb3fe22e46c3b534dc00. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZFYW2128396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f72bec8dd9365957f1bc7f3bc9ef90ada32113b82fc719a390a72792cca12a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHN72170852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38667761cf56dd8b0af3243584ff550b1f8ec4a1096953cc339755b8d60c5c3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN72170854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8aad3defefc75decbca18dc111febf9dc61f8e7a1a78f661eb48d0649f9cc2e. 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/QZHN72170856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567dece7dc028a1d89502a154859738ba4f407dc3e2a383e3491d5d85d41ce18. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZK6N2231959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba99fa233f87f8a844b5b0901a101b0098a86a0921f69d7a9e70eba6dd38fc12. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZK6N2231960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c16620cac591a2a1f288d14b14511c2f0cd12e4b78b12fed8c8b05e7bbdd64. 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/QZK6N2231962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd441fb86b7c7b40791f5d562d385b84f43f43ec1ae5946a178128770cda1cd8e. 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/QZK6N2231963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8269e656a72fef07ee6b428c32472315b6af8de5a9229a4069fca9bcf52857. 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/QZK6N2231964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9ab7fa899ccc5fa23bfb59ca96983264a59cb23ccfb17e66808191d95d9bfd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZK6N2231965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4f7ad699ab0b39f481c31a611ed3513a4488819650ef83556a985c126f4d98. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZK6N2231966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5090f45714df5511251bd731e73f9aa3a4fe269b04cf20a09f13085c53deee. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6N2231967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e20d2f9c523a586acb973d8e6d6b1bb20ee228ab30d416176dd5080d6396e70. 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/QZK6N2231968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b31ca9e96653d452c7f41ff75704992a5190efce826b6a0d4d22c7d42729aaa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6N2231969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0d6129c65f53bdfa093f848f1444a992fd165fae26f28075eff37492d5f4ac. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZK6N2231970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b4be1ad1ba24c6df0c8d41dfe3e298c8b8de80822860861e5383eae2dbab07. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAS2205380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b92470b93182d2aa2af308f730eadc17cc62623c10ed14d3a54b30108ecf47. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZTAS2205382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aca7a0679a6114ce9ef83ce0eac65553575e3a415341310404debbf631030b2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAS2205383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f0bcf4faea866f1e5cc0776a4e38d579f588ea0be35270d52fbc27fa8882a4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZFZ72382460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7781176baea5b038fbdb0500061fb4b8dc0e975bb76ed9e78b8a9a98873530b8. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNWZ2305126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ea218cd0dd54083185698b42bbee15734d3e4348ad6d7839dc6a339aca0b54. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWZ2305128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26330621fa48e8691b3498c6d51679d69b2b37168bf965706ef4d28382eb1911. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZNWZ2305129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62157390db7008ac2277f4cab36e4ab9e6453c9142f03965555f8a5360167531. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZFYX2490828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1425f5e5f09b9b4d71e2f27f22557450c78688efe3aac46c77d30a676807ecf5. 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/QZFYX2490829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f368d1c3d843f74b0b5b268cc553ee3a8f0335c0a66aff90adc55ec4374c8d8. 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/QZFYX2490830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005f66ea9ecd357955a9b9f7e49f93caba11477dd4ac603519d4cbdd14dc570b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZRP42468724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b22b86186aa889384801aa72a46239e00b45f6bc6fa57ff38724611f738c029. 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/QZGWX2116396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c28b9263c48ca19a14936f46bc46e2e5a71477bd33d197a3219eb194eb474b1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZGWX2116395.