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 0x96077b25987618f9e013eb5053cb976d78d9fd85fe15fba25af4266da1b51ea2. 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/54262d74-49c7-4659-b278-76708fa34c86.json and https://artists.proofprofile.net/proofs/artist/54262d74-49c7-4659-b278-76708fa34c86.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 0x935258bcb1e0c95fce0f471b993139aed514ca660dcb1af8b48134655e5c2ad9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZFZ22208034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124d9c8e60e482b70aafddfe19738a2a1f100ec9d019c0b99869d2d1a55bd93b. 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/QZFZ32244912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092186daa06757c10d11d3552b84b522faf981f2daa6e2868b138ae9c6c7669d. 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/QZNWY2162912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3944968066b0496a118486c8df7091b453b4f7bcb0fdbd5b54e6223a83288e79. 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/QZK6L2082367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d6ec8e74f6dacccfde4859ec12f67f7fc1f6d7c66219d981965edc8007ab71. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN82498098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee781f574fb1d7e6760d13cf99730047f5e0a94fa52dbb75caba3305c734c503. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN82498099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dceb593b1e1d5673c4637a362c844543fbba158dcd1d768fec6edef8c1b0405. 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/QZHN82498101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4f87818b4c30de26ecf8d7bf208b04a7d1acead4ad67475ab526594a2e3aa1. 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/QZHN82498104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0594666f218ffc26df4aad79029e01ab2657bf29fff5cfef568b5e0cade3da. 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/QZHN82498105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bad7d7ce9eaa1e354e737381f21fab46022c3a0c0cde40fbc826465a885b4e. 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/QZHN82498106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102f6851363af94267daa0d16a088b47de657ee521c27fc237c6930fb29ac6fe. 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/QZK6Q2212218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521fae8fc926fef97d11cb2809ca2c6c39f54914eca7bb4288b5de706685313c. 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/QZK6Q2212219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7463d12c228d91a19a5d5a9e5558af870d82d0d036cb523173b1fd1c03114e8b. 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/QZK6Q2212220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378d35b60fe4c873b304f9ac47a7b96f6a41b25e2960ff34674fdbf72e745db2. 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/QZK6Q2212221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04e24474810b44af9bd07434c8a7d140e0e314938743d195b49b9a74e2d0b5d. 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/QZK6Q2212222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaef28469e7b2110eb6a12b510484856722029536d0242416d8b37a468de0405. 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/QZK6Q2212225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0124f0af222317c9a89794159e281bc44f1aad347e16340e4caabe7135f2f7d5. 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/QZNWZ2429097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fbb0cc336d0c1c4b87c6dea9e28ce7ade5a280ce4355b358ef39d454fa40c2. 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/QZNWZ2429098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af3a2258688741adcbfdaca83d88a568f36c28bf633a09d47798e63ac4ded3f. 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/QZDA62457570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493b500d70676456cd0edc8abbc9a04878f3c4c95ecffe23d76a28208fabe928. 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/QZTBD2337440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad7bdf356ca01bb6039a39db64eb7c4bc63106fba2ad6ab95636f3f649209fb. 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/QZNWY2365381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5393e5baa5120f17fcffc5c88fe7168ed2292d3c584373c814a8449a18487c. 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/QZMEN2348968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24de3c349ffdf9c51a22e0014b04163b5560dc51e68eef4385c25f4cba0c836b. 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/QZES72335412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3aebf4cbfe7fa73acfa9d2e546e551e36fc69834ecbf415121eac53b7558a3. 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/QZPLR2139388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89738321553f5688f569a1fe220c7cead6665be650a2fae000ff30d2c2069ac7. 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/QZNWW2134841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bd17ac42538c010c03a4cbb7a3d780532fb5f0c2a6945d589d7d70ed9efed4. 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/QZNWT2183990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1798562de0a36c19b41af87f2b7345c2b7b233ac70ec4dd474d69a475b0d708. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES82149489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fefd2fb341659ad7494ccfa23ca5078baffd22216b90f05553fd1fa1d21834. 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/QZFYY2188842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f654709809bca34e8ea9db58bb3ef025a8602cf0594c7b85f638488cc6e70e. 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/QZK6N2095592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390d44428936f1711f821e56f349efa68398e0ccd98a4170d3ca66262235f7fc. 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/QZHN32023888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413e241269e60cfe7d40bc24ed1757faa0313ef8f9922b059530173f9806737f. 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/QZFZ62026645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a379ab60216e5f6aa870e4f880d7bd06812fdcfd634c61f35e00d7e2207f509. 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/QZFZ32039409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c16f2a7ec47ed64a2a52eb9bac265e5753d665a9188e94ac24261b9b672d4f4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYZ2064321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327327ff88319c42b0a8962bf084a716d8c2c92bf47326c6242fe6515c459d29. 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/QZHZ31951826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e915c18853f7cd264bc78aa22db5e02380fcb7d48c55e736b8972700bf386df. 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/TCAEG1977114.