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 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 0x1eb4d89a86cec0a47bee1515fc49ca0dfa37b628c65e7d681526a09875f5402b. 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/5e858a2b-1ff4-4d9c-b936-13211300c9d6.json and https://artists.proofprofile.net/proofs/artist/5e858a2b-1ff4-4d9c-b936-13211300c9d6.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 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 0x7b4632d3680501d375e250fbf617fbc256770d566a7bab9aa3fb9bdd465f2565. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBLV62016567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd315eb6fc8323482f7722b15b3a4e40234147645d2f533a69f8a26abc0e8dd57. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLV62016568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c027f6fe51d1d82f0d1c699af05aa46e3f12a3c113199e4f791dbbc60c8beb4. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBLV62016571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2cda6871bcb281aac2a98b6be35ca4def93f4e849684fd5ea4e696e0da5b1b. 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/GBLV62016573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f820939e997337c2fd7760982df092620f5e702dfa3d78a4c371d8c0451224. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLV62016575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1358175b5b290376a27296c0a3b8a6bfc81481310833651e51f4c7a474dd32c. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/US83Z2113053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffb90528df66a669479fe1ce4afca0086a084d561b5f6b6f09679fff4119422. 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/US83Z2106816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d67b4dfbc3b94c0fd69f2bd83b75b5d8cb9cd0a17b140347f8b4c7488e2662. 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/GBKQU2059896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ee701886f7ffb7c886803a0231107cbfc66526b89fe1bc5abeaea2bd0c09a4. 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/GBKQU2059897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89eb261564035afdf65b3dec47de8cf7f8e291f6fcc8a7449bb8dd8f489aa71. 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/GBKQU2059898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51e23a2aa1575cea0bcabe6ba2df37233f7816b442402e9fffd4d9f8946991f. 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/ITBGD1900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0eb3ba8750354b4824abf50ef278a02afb87d27061def3cbfd2b36da73e4a0. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ITBGD1900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8e04cb8e47f8f6b9bd1603b8297cb025c321a2d8b1fbcb24d9c95284ed0d3b. 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/GBKQU2055593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd2caab8edca2796fab524c434459b72f5c02b88f4411115e0474e236707189. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/GBKQU2055594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4571cc7a71a7add0908870ca3b1d5d19a0c96795ac978c4fcb5da4f50125a045. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBKQU2055596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e41176a8d9905858f42f3fe946a61dceac01e1636a2c738db160ac4eb3b8420. 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/GBKQU2055601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea02987bf4ef138521ab75c7e73d1025f5b8a7994d61f916833c39203705b28. 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/GBKQU2055603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fe316bf94d5894772e40f3b52b6a664aca1b5a03408d9f52dfd15c5f9675c8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBKQU2055606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb843fe2ae1f77aefb211fb70d8f53ff6d1761de1d8539633d9286114663287. 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/US83Z2114300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf4a0e3b94a25034d6ba155ac5950e5a636d3c157e4dbab57c77202ebcbfcfe. 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/US83Z2112640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0696ef803e052ec300b2dd7c3998588a16b3c2f339d2dad1743531487e0c5ef9. 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/DEY472271137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34011e4dc4ada02ffeccfc606843e88308169e0cf176188a5b27d8bebad0bfa. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/DEY472271139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5209856b35c6c06230d0473412439144a4e670d81e4964ad7286cdadb065cc. 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/DEY472271142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4012bb1c52ac303f3b5185be3859265b822967a65d0f4c34cbe5490bb928b4be. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEY472271143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c29f507b900ce696f8f8a53c2d456f769fa1f148832451e746d8cd720b2e1c. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ITBGD2000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472c930bf9aba1d930e2902ef601e001c33cb8ee0ada77876704eee05d548955. 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/US83Z2133323.