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 0xe8a86dc72601860509964a76bb4a8c936efae6f63f78e3bd9a7c75b981ea238a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96a63da9-b8de-4bc6-b7f0-ffb99bc1f635.json and https://artists.proofprofile.net/proofs/artist/96a63da9-b8de-4bc6-b7f0-ffb99bc1f635.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 0x70f892ce715affc820c80b297ea101ba910e48dab5a5f220644cb9f0d423f170. 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/QZK6F2041389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672f9fb841dc6f2412a3f6154a02ff2b56f4c55ba34bf943cfad1d530f414593. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6F2041390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ea0d08409ceb99d5ec3eb19e2c3c0f16d2ec62ed6d3beee8a4a68c0c508d5d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6F2041391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dad2ad61dd9c3c38cb4927a50596f8631e2fbc98feffe79e694755be6284ff. 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/QZK6F2041392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2362bd39299790c7ef2153be48992702605500dc5f7ad5a662ff9ffafbc09041. 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/QZK6F2041394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c0cce68eaa7f04826df1e0340e739f77d808b1e3ae06dcf807d303563d046e. 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/QZK6F2041395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38713181133792d9528c93ebcce20f5bb3a3cab977bbfe7920227c6f72423d9e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZK6F2041396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9808407b4a8987376d6913d803e6285ef7fed25ff0ab7ebac15583988ff62a. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZK6F2041388.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8857953f433c1fb3ab8911153ffb2cb4b081e7dc0a8c0c45aa719d3c11a774c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZK6F2041393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8a1349562e88882e20b2cab877637638e14c2601516fd2730afa874eb5a1d2. 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/QZHN72203748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01411d126d06fac652854f7b3f1645094ab0e758bb34e58fc78f42be1856034. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6M2306601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0776b9e6950ec456bfbaa443f13dae2b56d20112ce0372dbdac5767b017f9dc2. 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/QZFZ72058504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf794ab21ab7b3b0bd53f3e776afadf776a548b3d4ad14c5be9eb4443ecb2e36c. 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/DEZC62361534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaced42ed86c15d1614615402ae50b53bc484690129dba4a83be7fd05424afa1. 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/TCAFM2119082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd635c00fff8743031524df54d026b154e30ce6bf964341975005be71273a0808. 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/QZHN62302229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba05dfcff2e00e402a55ead6735d07302df04911fb6f0ea8318d40e3616e8334. 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/US6680916840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d9486b5cefe066b8cc0d920bfd14ef3894840706d97ebcf308a585ed0f69b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:54:35Z), 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/TCAFM2133276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649b195c7923144a0bab456a597da3789ba40ee2e1bde73a8d3b4edf3484e026. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZK6M1931823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406a7c252a26643576880c8d91cc288574e6594a9fc8fa93271f3c872c6a6beb. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USHM91923353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6355bcc7ed947732727be8f77065f5e86b6af50deeff65f68c522a3d2309e78a. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/QZES52364290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001f72a58aed1706a057243bfa290942bcd6efce71f3a03b32f972177c18127f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USUYG1367577.