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 0x396bd1513628d79fcfb8cbf86268f3a355e3a5d58f30f1964cd272b717330c37. 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/55788736-f6ea-4459-94b1-8edeebb393e9.json and https://artists.proofprofile.net/proofs/artist/55788736-f6ea-4459-94b1-8edeebb393e9.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 0x194372b59a0173655841c914ebcc6d9b147f6b34fcdba912d706791286963cf7. 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/QZNWV2426992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe62f0ec62de65f7158b8cf3e47ffa321edea35bbf45744df2bf91b54d44b16. 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/QZNWV2426993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2ee3327799ee00028e3311c1fcc1e65f3312d1814aa0be4f60c96a72873772. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZK6H2444625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8745c29d9a0e214b4b0b74febed666c0a8df7513a350a66e624792c5f029897d. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZES52499677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cd50a023901c5efbe9d7234409c1f6ee3cc09d3b363ebffdc08152a8a7c44d. 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/QZNWV2426994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8271a67fb0f86bb9ccc483f42d4e6d4012990a89c14be599bbf94ca287b99967. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZNWV2426995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2ee3327799ee00028e3311c1fcc1e65f3312d1814aa0be4f60c96a72873772. 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/QZK6H2444625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11360e3f69b856074c13054c7b10e6c29e9d53d15a855d87c799d4a876772b2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHNA2444738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8745c29d9a0e214b4b0b74febed666c0a8df7513a350a66e624792c5f029897d. 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/QZES52499677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0809ecf112244c0f62f2cb0654410a8028fdbd14ba8a94430f1ffdcd9b885764. 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/QZHN72312492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4f1df3c806c666ff9e06329b23f96a271259bc6b417008549db2e21783cf9e. 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/QZDA42370742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d1a6406e6eac611d8d35a8072602e435ba4dbb05282d17f99a7a4f0a78d901. 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/QZNWT2252251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd6d189459e24917bed8e38d24bfc6ce66127de64b7e37201bf132d8f7afcc5. 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/QZK6K2236213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03fdb7d5cae6ebd54c8b542cfcfc74e648388f20f528bb9eb56a13255dcb983. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZFZ62238984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2792ee31ca835b4484eb8fd9551894ebe18433b51caacc196c9cf9a0f03bdda1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNWY2163224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464ea627200087d5b48282fc0fe74c4e342efdd9a0aefa637b1aa6acb7edc5f8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZNWY2163225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438c185f2d52ee4a5643f6bd87b1882e1ddee18887768a666d9f462770561820. 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/QZNWY2163226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851007d97397d229ca0ced9ae7237484e67247f4231996f6e2211df593c67a93. 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/QZNWY2163227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb62563d4fe056d94baaf1c7e6234f53d212aee2accc26e63e4e14ac7f90c44. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZDA72171020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb507f39b7ee4c93c215564ccc33bfccc64d3f9ff2671e47f87f7f71ddbf2a883. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZDA42170818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa715a49aea5aca8bcf505a41026977aa4e99569857dc0808448615deec384696. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWU2083958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a2a54d4efbd2e2e0c83ac59e50d152b4a37eca0ff6f0e38c50f63a7c58249b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZK6N2035769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e0f0fe0bf6f23df66419d23c462c517e24f9a0d6439371d512c8ddd3236089. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBLFP2010895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73830a2b0c218bcf972094364d37e4c41bc4be459afbf162d51034f733a5ffe. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZFZ42026781.