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 0x54b5f9710d0a0030ab30ebfacf4830b6b3da5ec9f0ce17317db742c8bb45c651. 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/f8f854b8-c24f-4076-a902-5ec18c424f89.json and https://artists.proofprofile.net/proofs/artist/f8f854b8-c24f-4076-a902-5ec18c424f89.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 0x82adba0823b69b85f5fd8bfc386c8ffc3411823fd46bd2c61c8bd555a10b6c56. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPLS2465800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac7df2b392da965385acffb86dc299f20e19db7548255c56d60ccd2002ef5d8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:54:51Z), 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/QZPLS2465801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63424307c2ef543444b0accc382f1d0d30b7a6722f8e004e9b50389fe2631d81. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZPLS2465802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc466b27d37d2986bf58c971ca11a33c345ed9ff5daf483233f3cc284e03bab. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPLS2465803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7295898c3b657a887a1788ef3ce328790265c8338bf5243603f67af8f8e46cf. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZPLS2465806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdd6a5f9aeff23a9079e0a6bea754291fdbeb3d5df885e0536464fb6ba7482f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:45:04Z), 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/QZPLS2465811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1643e2f5c5179826eceeea483cafda7561908aee7b38db18b6ab842f9af37c47. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QZZ7X2555110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed52933fd99d215bbbb43f9754248afa04217b130c97aaf4950e63c84aa78bd1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7X2555111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bed726509e89a19bb51bfc8ce3e5f38585e8dec23f09d4ad144f21ef07ebee0. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZZ7X2555112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76838e347749ffef46aaf53c866679902054a380bed4c9724e169e60137255fe. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7X2555113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b43c278277be9476a820d31e61d175e9fcef9966b6686f1a7116f986b1ab5d. 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/QZZ7X2555114.