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 0xb9dbafde21045481f63f0a17631e4013389a0eab9fcf0bd4622c8b868a863e08. 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/7eff8e58-3436-425f-abcf-8c5de02726bd.json and https://artists.proofprofile.net/proofs/artist/7eff8e58-3436-425f-abcf-8c5de02726bd.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 0xbecc0f93214deac5d563fd00a99fe714f57514caf232f91abe0c666867d41ce5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZES72222093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d7999cba35a24055c6b930053dfe24df9de9a1630bad48ac20fcd8d347016e. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:22:33Z), 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/QZNWT2253152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da8b71bd69670866ebe32e9529390aaa6719203c1ba8bdf0505ca33b82a1405. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZRP42279009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ad97685fbb1606bcd2d97f467a1c7c4bb609d25e15a4e6cf17982619eb0d90. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB42293910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf101909c01cfb80319f4faba28104a43b2b80d22734ae53202c9c20532d31507. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYX2351409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351751338b3e2965e9b2aaef18dcf88cd692639244e208e5bfce47917629a293. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZPLS2356984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41362c3866f1646ffece87fdac2a060a4ed270d29cf8186d4eb060fcc38ab3cb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZPLS2356986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f0bbbff3417707495f54817ee9d3e3b53a5a1d746da9417fe1722655f89c23. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPLS2356988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d7999cba35a24055c6b930053dfe24df9de9a1630bad48ac20fcd8d347016e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWT2253152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf101909c01cfb80319f4faba28104a43b2b80d22734ae53202c9c20532d31507. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFYX2351409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4188b28374bba36d9bb045b9ec3ffebd4c94838cf08446a4918dfd04590fb1. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZPLS2356995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee94d43f64665f7fef955a24e2a7a89f912517fe4c437b51414c41d20546389. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB72590101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69f8ecab3789b96dbbdee08f4b6a6bfd2520471101cd7628ec0efd61f0df1c0. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZZ782427224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8175387941ab2e3bff2f18d70bc27bf83dc67b4df01eb4092580d86c7c298b8. 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/USZ4V2500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd65a67c6682deebae2cdabeffb1b5f5af026fdf39930a50b12ca43f3baf0d7c. 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/USZ4V2400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8175387941ab2e3bff2f18d70bc27bf83dc67b4df01eb4092580d86c7c298b8. 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/USZ4V2500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd65a67c6682deebae2cdabeffb1b5f5af026fdf39930a50b12ca43f3baf0d7c. 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/USZ4V2400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd65a67c6682deebae2cdabeffb1b5f5af026fdf39930a50b12ca43f3baf0d7c. 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/USZ4V2400351.