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 0xbe4531ae23b44b0cf73300578927a6372b0be8b1cae4a1553e61c16b61a4fb8a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c56c83f5-dbd2-4208-95e5-8f096873f481.json and https://artists.proofprofile.net/proofs/artist/c56c83f5-dbd2-4208-95e5-8f096873f481.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 0x80ccecdcb9f990001d5f65dad6d0b1b2245cd347e0b67ce151c651ca2507451a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZK6L2141764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd637119c9aec8607671b1f57f08795ac89b7554d7c8e91ea1039f6144b47723f. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:26:22Z), 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/QZK6L2141765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2136fd89a4722213c94e5e0829bb5a29651cf636614d1a8a9e25fdeae56a8270. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ62226239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2aeba383019eaa54936858cf810ab02a48a77579482c138fed5aeba0c2f357. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZK6N2221102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5c9b5fffa5d3660912e98ffdf9c564a383d099fc63250747d8e92f05dc4c14. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZK6N2221105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8903512f2c9ae90b1d107e1714c463446775914805fbc2de50f3eb4b83b070fb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZPLS2234142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c63d41675025da66ae53bafd13a08d7c4ae435d95667c78211de9e660ed1a5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:54Z), 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/QZPLS2234144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221c5a3a75cca02e03aff12a87329a6b8d65c83aec1b232c2466e04552e9320a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZPLS2234145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05579ab7315064ea0533950db441322b4f56d4b7462451266784af4867642d8. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:01:17Z), 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/QZPLS2234146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb6b6460c0284b0a302dca437bee4c39554b0975a6db1572c85e265d1a5b740. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/QZPLS2234148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d865f311cfe05995667b1d1f8a315094bed53435e861cee1d471ace5a58cfd. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZK6F2198101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb96654d89000b5a70394584b52ef1d47d7d0067609210993ce102897a83194. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZPLS2234149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1010f524cfc2268ee78d14aa190d52e707e253e3e11fd45e85910372984525. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZK6K2527345.