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 0xbd396405f40e20f920d63a879bf2d9c97981ef5ed96cebc25a7d489a3fb90b14. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8b96b10-8007-401b-9a53-c6214cfb3654.json and https://artists.proofprofile.net/proofs/artist/a8b96b10-8007-401b-9a53-c6214cfb3654.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 0x2dcb8dd2a6e3bb9220ad653648502fb5ca4fb7703dee93e3b75509497f2737b8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BXK9T2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff88c5c8a4da30a421f03a771145cc442228b9c8c27966f84ca335275972242. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US7VG2491092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1981ff63689a309ba4638b94475ff09d9871b00f890000bb56c6fdb36fd3877. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US7VG2491093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117ada96dc51d87eb956a2f1818b2ba43524eb6a2f3e7718e714df0586eaf8c1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/US7VG2491094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a01cd610c52c924077d0624b398e1e9e2f1502e71a9665267ca33b41cd2189. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US7VG2491095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221a761d27dca6d3ad2a30d76fe715510b53eda96d71b48580046f5e647d1627. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:10:18Z), 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/US7VG2491096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbc71b9ae9d64ce0ae970a08b4a405dbf86f244360c6326d552d23bb3f4631a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US7VG2539252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a34c91c2009ab4947b518d24bbeb7214717c81c1a1ad4297429057b9e037c4. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:09Z), 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/US7VG2539253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5792cecd192f2a7dd846c5ddfd748fc46ba1c7321181371e0c7052826e965a69. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US7VG2539254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fbf99e55c9dc5a35863f201ed9ef9a068c31f98ba5ef2f82f872119512c555. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US7VG2539255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae006c132c6aaa6a55131fc6677760995482bcab08b34855653896962856377. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US7VG2539256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f86330d682175c46ab25876997b3571000419d30f55241098fb2a1901466c6. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/US7VG2539257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d58b00a19a6fd70092993f848f48c587eeb24b84c9aad581d8e6293d5f66513. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US7VG2539258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69773ff1154703c8de7b1c5c83eee5a0681e81fada5cfe83d480cd221485c4d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/US7VG2539259.