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 0x23ad6e86016c4192b261a6d57a80f7e889e9197c5ea5d30b06a50d53932437ba. 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/e62a6e9e-ac4f-41c1-ad8f-731e61ba983b.json and https://artists.proofprofile.net/proofs/artist/e62a6e9e-ac4f-41c1-ad8f-731e61ba983b.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 0x021a681592fffd4f0f25578e90d139ea77926869d600f09cf2ed94699c270482. 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/SEYOK1863043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4955361d80861c978ca3b23bf5f674b768d69192d04e7e05d4190b1b687825c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SEYOK1863045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faba632d8ad5e31ca34f5c633e60d0808229c910109e2c71643a22eae912eb9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SEYOK1863050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a02c8bf7684fd965449ba9a0ed91bb4c6fb416221630c590073be8515cd62a2. 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/SEYOK1863051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a2f890f1f4d9dc1b09a781cdd5a818eaf428e79c26b8a58bbc2c9ee81d7dba. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEYOK1863052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c7409f6191f0d3cc1092fb1ba75cb9a5a7b6fc198ee7b711a76b715df7d489. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/SEYOK1863053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03249d5a83b43d827a408063b100bc0eb123e2783e839853c39ac5295c87dc2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SEYOK1773140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd507be7dd6ae21d542a7545d69f3bbb20b12e4738a86b67441389277cff5584f. 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/SEYOK1773143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bde80ea54c76e18f15857914005e1c598a6bdd92566b6b86aebc9acdafb8d7. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/SEYOK1773144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa369465bf87a7178c9493136dcf2be7cb1722027ca8eaede35cb0a5822ab8138. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SEYOK1773147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f1ba7521d65c29623df3ea91070ea2d46f1f005070c3c86b7382efca128b82. 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/SEYOK1773148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f9e3fe68b6be08e62fe4ed85af21c585c3b4e52db4d3a3e6a482c2766bd659. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/SEYOK1773149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4076c16f1d489b6d4c0158e655411f6ed54d5ffda0cb1b8db590afcdfee7233. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SEYOK1773151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3435267f4fd27033cecad558f77f2cc0a1fd279463f9d3614b6add4b8e379c2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SEYOK1773152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e0ad1e622e4cde646e3123c295b05b61749da9ab0a1927b00bef325b06e995. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SEYOK1773153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b16ab69ae58034ecb4af1d8c03561f7c4cbbebb5c90ecbb693c6019acb9f915. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SEYOK1773154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf7c6006fa30c4f96258ea48ee2499d534bdfe63e13b2d74627f44131e99948. 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/SEYOK1773118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05defc388563d12429cfdec7e278b6675261a30fcf6e21c9418f2b850635b17e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SEYOK1773126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbede21514ad3acb5992d80a60d173a6511da0281035e1a075cfefe8cfcbe87. 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/SEYOK1773129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ed14669fc79c0500fb2b56fe18c9c53c35144afb565e4f94094e81d64dc1ee. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZDA52249531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce5ede33f9933fe1e2789f605839193b50e6e1057422e684ad6d93deb3246a8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6P2100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce5ede33f9933fe1e2789f605839193b50e6e1057422e684ad6d93deb3246a8. 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/QZK6P2100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6325b4f552dac43486d43d48c26f3133e4161f4a54f4af412aff05c9f20a5f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZDA52283039.