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 0x94d13a308d2c8b721ff4fd2fb3130ce9c820bfcbae74d144670970d9020f986d. 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/8130bb41-6bd4-47f1-adfc-cc8196968470.json and https://artists.proofprofile.net/proofs/artist/8130bb41-6bd4-47f1-adfc-cc8196968470.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 0x5420fac5015e78bf06cbb6f45c23d970a0c2c934a8367a81e4ad0d611853a81c. 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/CAUM82100236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8f50d48944779e8099c48a04372aa02016a325c66969931b0c7c06de97cac0. 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/CAUG12300042.
Last Thought (feat. MKLA) - Cassian Remix
Last Thought (feat. MKLA) [Cassian Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e85b48a4ea0a81a29d6ad3b880ed30941fb3569dd65d1c594c6f315dd023f20. 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/ZZOPM2220548.
Last Thought (feat. MKLA) - Jodie Harsh Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c462888eff4a9cc910b408e3639e9c628888c40ebbae3cf5edb549ca92a908. 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/ZZOPM2119579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f2e06051a18dba7caa0e625e225449e7ac801481bc1102d522d4c499b7f8e5. 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/ZZOPM2108682.
Last Thought (feat. MKLA) [Jodie Harsh Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f2e06051a18dba7caa0e625e225449e7ac801481bc1102d522d4c499b7f8e5. 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/ZZOPM2108682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd527614b5e17259acac96cac0f78014eb63a4afdc2994a5a249a39f0f3645975. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CAV162100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fbcab9aec25e99e384529224d5a415ae593ede78192fa520eec1497c0365e7. 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/NLZ542201019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff455664e4a5fee41a98f45479289dd085038a0728f3251aa310c74b885d395. 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/QZUCN2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5368f6b8b176f9f8c407d6de9e63fa38ad41f1501bb0a95b676df7912056d599. 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/QZUCN2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fc5df6b0f203aab642994ed10ae0b7d41bba3c1fea030ed72b8276425ca16d. 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/CAUM82200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971871e9bf72e6f882967671f3baf45a4f770c608615080ffb2d969d8cdaaf16. 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/CAUM82100471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8edd1d23b197e0508c68dd8688db0186c9cdab5980c43057c6a3c36608be30. 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/CAUM82100476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29b7bed5424a3374cdef5d2236de6f8cde2ee9c79e3428d9f54107c8459d8d4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CAUM82100477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96280849c372cec9717f8e77b6d76a9499c6b30888b26862a83ed42e055702a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CAUM82100478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae77ff320645b52297362770147c145f8b91235558ab6448374a1c3e71b5572. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CAUM82100479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac15de15baf96556248ce49bea404e4b80693e96644d5e5faabb9fa645522c36. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CAUM82100480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77325767384e34d7ac9a2423dfcff386597fedfa1b13824fd01734eef6200f4c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CAUM82100481.