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 0xd781a9f2fcc0e8a3dd33605109ac69a173510bc73944e05c78f436dd44b4defd. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/389a7a9c-c7bb-4280-9c7f-aca0235d8dc7.json and https://artists.proofprofile.net/proofs/artist/389a7a9c-c7bb-4280-9c7f-aca0235d8dc7.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 0xc5d9bc482ad27b44c70fd5d52c77b3f123536e60a7aa8df1290b609260db198e. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GBMA22417472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764db3ee6909e93913e3ade0dcda2676197faf9cf48740a308303b6d295972d2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBMA22417474.
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 0x3a62d58b62f25c5ecacb126e7c0fc4d63593f56a51a8bf37905ad9afe1b3febe. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBMA22417494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b8c59c3a5c791baffe988a96388510b1ec43ca2854031a390b608159f2ba6a. 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/SE5IB2322375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dac52ba99ec9e185e5c7328517c1f0f24b195b14333d24cf88183808b531e7d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE5IB2265873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1865cef17237b8f0e8b037cd1a3f31d958f54e8ed2a46dc63bfb98a31b3723cd. 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/SE5IB2263969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd925f73db935a576786bf1d29acbb99b6480fc9d0408ecfa61f78fd6b900788d. 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/AUKDT2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74a5ea980c03bc4306723fe9662f67bbbec0ed77e1a44969f0a76c1db06f9d7. 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/SE5IB2287457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea99dddc8031fcbd753617914fb1b638ebf37983807dcc93fbe096cbb9af23f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5IB2100863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540c38570e973d3819619ec416fa7a26bfc71480ac8b06a77b469ee51909b854. 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/SE5IB2301169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a51d252c348b9afa74466e9b583fc8ef0a13ac35cdfc28750867350eb35908. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5IB2332283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd779069af2fa38951e7f1501433dbf661800e84e28896437d8c45ee9fa767dca. 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/SE5IB2297995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbb07400b9005c5bc4d6f7ff439355a37e7ffe624782b61f05a84dd945e987f. 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/SE5IB2310611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0181a3903412f89fce7850cac25adc6b2b9f389d6a50b66517229d14fc4cfa0c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5IB2332583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc218d48550873ee4be8f4691649fffce4173af3b581998e3ae9561743e887247. 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/SE5IB2310671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa564785471ce2fe54284ee7b708d04ee2e614904558ade7beaa12eb2448d74b9. 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/SE5IB2310603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112456f24194192362fc0f213683e281d83ea386e572d81043c5a97e5335eabc. 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/SE5IB2309590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc671cca95fdb42b10c8bed068ac1bf86bb1deda1977a9d387ddacf954832dd97. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5IB2327119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8774a8b261e279a194a1e0ce2bfddec9f26e12f9281ad40df1a8a7446f2c39cd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5IB2337991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad575719b795b8ae9478a9e8b1db3d3853479fd726594737346fba7a8f12f3b4. 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/SE5IB2329495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56df9223e88c75ff7c6d476b02460ab8c2b1bd659969ea592b0f2ca4548a594c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5IB2277169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06c662f77d2b80952867702a31c5d70f3ae4f726b89ab1af81af1c4c71131f1. 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/AUKDT2300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6d404ab8fa25dc6d7123f8b7e5ad3464313bf125e3c93d46140d9beea5da0b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5IB2321939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8540807d080a677fd47d3521f431fcf13a4fe578d762b62ade9880fc31628bdc. 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/SE5IB2257265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601236caee1e425d11c4d8c3bdc4aed926e8c356029923dcda7ba357366a32ab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5IB2294761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aac87952740811fc25069500b81fb8e3cd480b02f971ad091383a54a4e0e4da. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUKDT2300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c248e3f192303e5f038f42021af95214cdd85370e2f7c373283c7e12c931ea. 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/SE5IB2228495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a88aebd3670cdac549cd82edcb4cbc5934cf3b24dc0489f1738aa8466b5c2a5. 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/AUKDT2300003.