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 0x9d31310d2ee7de112d4f449b3e43a12195cfffd8cf6094134bd164c7a09feaf0. 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/2b97e4dc-a07d-4b87-83fa-09c007cae9d6.json and https://artists.proofprofile.net/proofs/artist/2b97e4dc-a07d-4b87-83fa-09c007cae9d6.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 0xf482eb10903ef83fb8da5d129247784d84818b577b7b543e0f29b6f9e6701321. 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/QZRP52481831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a345b030d027c669480474d1af005c079be29d5066e63595f74c1eb20bf30f. 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/QZMER2487947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e13a260aa372b6a60f341db5f2befb444d8dada27332cdfca8ab2c23b45ab5. 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/QZMER2487948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23574263b130247bff17db376aaefba3ec28a72b6df327c7be4b31c86cdc3f3. 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/QZHNA2450288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3848ac185c0884ccad30f09a57defa5f3f4a92fd9863f3ca85684c283507fb15. 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/QZDA82421582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5428f8486599dbc563430bfda45683916d7f5a6367340a32f95648d638f83d6e. 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/QZFYZ2443071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e5237e7f74524903eb78d8bc4f4196c014251f376d1b97ba97cefc06161f68. 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/QZWFR2338099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e4c3b3fd41912a2a3685ef6418d905cd7d13737288332fadee8cfa407a73c5. 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/QZWFF2334908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfec296c2154e26711d08fc86e1b1ae53e3e8c386d4829995e039c59ba7a67a. 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/QZTAU2344356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021713320974bcd8d9ddda520a63b2211af5622064a4a3b79d572e319787de56. 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/QZPLS2374362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96570282868ae1603d0b8e2cf9b7822870f0b4c002da5da6a8071d3d3a96762. 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/QZNWW2346729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe0ee9e23cc8039b0979a5698d3fbbbec28b94ad79923e118fd79cd37650fe3. 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/QZNWR2328828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006b6e9e2efb805e234347b0a8b501982f1550568651cc9ff20ca0983a2c8e30. 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/QZK6H2389235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d61b35e101a6f20bb405795ed35b960c91bc72d7937edf3b31ceec0a75592ec. 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/QZK6N2310944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603225c4a52a2dced904f97d2e9afdf2edc9790259c2a07872249f3a06b1930f. 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/QZHN92390863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85ad18abfc60117a679f72cb9358250b26251189a87cd7aa0f2844ff1559110. 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/QZHN72302125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c764f7ac119af7bc3c305637884c88583466fba70893fb7e4ad920a87c3c61. 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/QZHN52310537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4567cdf678583e258c21bf8ef4bb88dea41232ea6c63cfd351040fdec0e505. 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/QZFYZ2440190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971ee35fb1484b221c8dac39cfd5546e3cfcff0169797a1a17f9fc955fe56dc6. 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/QZZ7T2495334.