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 0x7f3ef904b8ec35187b41e20d1f292872bfdd0ece04a4e32d033453f392dc5003. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75369637-354f-4518-b152-49c58de1505b.json and https://artists.proofprofile.net/proofs/artist/75369637-354f-4518-b152-49c58de1505b.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 0x279013f5d27766eb8af0b7ee977a34504c43c05a28f800a4d394bf4c7a040287. 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/US92U1904455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8784e9d75388fce27e151ee2bf7478852932823c7be1315973334f08d59dffcc. 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/USY871500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18f177865c41a7588315feae160486eb275440d480076ab09b184f683eed051. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6L2336659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e78432272225e3fa489b1eb584c0f6f07bec5785079511cce6a35282da9eaf. 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/USDY41560290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b3402954510342fbfee67bad21455822f022b4a1bc07636a2ed09d70d19869. 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/USDY41560292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36427a115bcfc41ea1dd4d4904087505db21df147d4b80575be8230eae829b28. 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/USDY41560294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95bb99447e0eae05f717064c06799c97240fddb129136eed1f0fd8c527f2006. 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/USDY41560295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5854ee78717b74def7bf101a69b70a51cddb2b1f0c943b13b06fbbd3011ecd. 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/USDY41560296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4487d612cebbd49b29c4f5855598c77fdcc7bfeabad15f68f99e138b05ad145. 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/USDY41560297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61737716c3a026f71df0709e9419ca61d2169f0c2e83a586d47f858c753afca. 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/USY871200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f56fd8048808bb91ef9c8204a695d73b76c56ace17016897c697663c6d3c34. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USY871200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1cc5767ccf330bb0314f53b9ce4cdd213a98192483bffbc9b9bbba46b2fe2d. 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/USY871200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae26f72ee2b0fd330d1bb588a4aacd3727f8729234cf6655af955682eee3bae. 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/USY871200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9da040da715b58db891abc101423ba358813292fb92823527d18676fbef7ee. 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/USY871200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca5e97c06b02d17d38c1d84dbbf19f7b50ad25e7c739627b7d9b6387b255d15. 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/QZSYP2311471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca5e97c06b02d17d38c1d84dbbf19f7b50ad25e7c739627b7d9b6387b255d15. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZSYP2311471.