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 0x3121c84076e0cd1a8c9cc956ded58d0ed9b03462795acad35b639f59d651787b. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1961a03c-0d58-4fe5-86f6-68a30fcc5251.json and https://artists.proofprofile.net/proofs/artist/1961a03c-0d58-4fe5-86f6-68a30fcc5251.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 0xbd553829ecf40fa60c1d9c01eeb216d48da6438be819424c317f914ad104bbc5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYY2133431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2168c66142824bdca3ba975014f8367203c9e7564399c7d08c088c955d3a6903. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA72145174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bec3908ed8f84a2056413bdb16833f179126f6663637474dce45ac0519ba5a4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN72179239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9882e433d02f15037f8e4ee380e3cafbe9fa72b3448013230f93fee383a9a1b0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPLS2163356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7b85ca8055b7db228faa9d5a91c57b4dee441650f415f44431c032258ee7ef. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZK6H2205270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b7857ace334db1e0be95858665a547d074e2281106977a2c66fec9826be007. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6H2205273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12386916eaa8f4428b850db59b5068c87db30000f480ce9c07015567b8c1477. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:39:53Z), 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/QZFZ62389202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9206dda40c0368e6dd123a2637ad16c5a0d793d0e7170e9c81e8e517e101b906. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEP2350912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a5844a023b8518df23514cde41b5d6f2bf033960d4b8e7686496e3f2434db2. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:16Z), 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/QZTB72312833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa250a7f1b431ac00b964741665f3bf2444873b04e12bda3b853ea271de33045d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB72312834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae8d9c2991427187341e40a7d86c1dd07cc45506a3dad7f0e4750a740d6b8ed. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB72312835.