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 0x4b1b20323319a5ec3650b6e745702536d6da305b7f1751ba5e754d0301145e2d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/145f147b-8739-464c-a5ff-944488c872fc.json and https://artists.proofprofile.net/proofs/artist/145f147b-8739-464c-a5ff-944488c872fc.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 0x73d3f7e38a70bf31ad2127829772b3535ec5c396b387479169ce2062ffde1a10. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TLREW2227405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcea1883fca23c24826b7e075ac3ac1c22a3cef09d2d812cf0aaabd4388a0ade. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TLREW2227406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbab2284ea9c12c498ea83d5c05bc7ea36ec3b99fc407b0d930fdaa2c57782c. 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/TLREW2227407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61c236f29a7a1651f9d0de57788973d563c37aa50ad00609ab58719cb74273e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TLREW2227408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037b667a4ed531828f60dcff830f92f7782d9fac9bd7b8abde377e70c92d73e3. 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/TLREW2223760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c297f9a06433cd459ac564d1882d2fd0bde1dafeac09b24d5a0204de77229b0. 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/TLREW2227409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc495179287c89af88ec2777a9e2534b405d0aaf520d754f63ebc63813258d4a4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TLREW2227410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6f122b2b2dfc48cda91f233730f8dd7de2bf9ad3909faa2db2ab28a859815e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TLREW2227411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08b6cb8641abd462d51db1fb845e4a9ff1f7ecd7dc470e458a8fcf3b35356fb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TLREW2227412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabfd9c57a05cdc4b2c4709b8bc98e556c2219dd45cd0ab5484baf42ccd53292. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TLREW2223759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e52726c635b2d4a5a95310180e8cac65ac8168fe1990519c521c9b996f85fe5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TLREW2227413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7073e3d58198750f03db5f3bcba640dfcbd89cf8dafe2cfc4af3aca637d9d43c. 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/TLREW2227414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053eb4b41d3d61675679d9df6be65e95b96bff01721d3df6b6e1fe8b4e113a90. 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/QZHN62455621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042d4a5d9dbd4b9703c1eb50c6dc0f1d8d99fbdea88907b733ca714e3a0ff3ad. 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/QZHN72248300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd41b15a5bcecd9dc06864ddd7fbb98bb77348e2ec18799573a1caa33bd48f7. 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/US6YF2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9fb2433ee155918b4a60a45206ff87fd965d92f8b09a57d015a2f897ee7410. 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/DEQ022390700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ee1e6250bf686925a65fd51a16430346a83f2eb899e7061a9b7b859aa8847c. 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/DEQ022390706.