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 0xbd28e716c81626a010d04ff046acbd2132f55b832a3e2202f86d2becaac757f5. 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/ca7ebca0-75b8-48de-a750-fa577daff723.json and https://artists.proofprofile.net/proofs/artist/ca7ebca0-75b8-48de-a750-fa577daff723.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 0x422794a856d57ee44c4ac31077eecab62237114b5d0a41d3285807119516d095. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/UKXN22368078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37060b1a24b1ab708a57d2e117e88f45093ab3d9d3e70354ff6e3baa110f2c66. 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/UKXN22368079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7301534c03b8a172c5da8b9274206a40c0c2c826220f98d251b07f62dabfdf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKXN22368080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aa95211053d5c35735f813433f7429ab33ea6ea0c4bcdd00b54d76630c9830. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKXN22368081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9b0828a43305f9b996866e59b53dcd1144a8136e1b827c7d2b737d66c6900b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UKXN22368082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb262094551e79a67c65f2b513a2aa97e99934455387909589edb03fe9eb93377. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UKXN22368083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b18e68328a8b6a53319a036b4859d2ac8e7b81242a2b3f2dafe5bb24282bc10. 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/UKXN22368084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c83d6e769bfe2138ebffac583e9d32b6723752eb606cd7aee74ea68c60107e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBMA22306509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e226365ea63404f9ed709af57cac0c79502f8a04ea5ec33070a43db693d30d. 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/GBLFP2481423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7be26f5a554cd0deba2a2c08207c11f6a62344d3a49a6904620ae37bbbf6be4. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/GBLFP2481424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd873546e591b825f9615fd0ea91135a7c82363a60db8ec61d95fc192ed017e. 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/GBLFP2481425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc223ad3e03dd2e388eb5fc95fe85fced91ed600a2faa82aae45f2234daff9d1e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBMA22443543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a02295c9af165b05816b6f976b5e55340d482d436d0cdd4137be375385e93a9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBMA22443544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8726dac6363e71dbffa7f285ebd57dc119b71e2c79b46325adbd933cbb16fe93. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBMA22443545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd891a5f40dfe7049ece6476cbc826a128e5000f78d61bc9ac601fad2f41cda. 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/GBMA22443546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a54d21358ea46e62e1f4e73ea2db2480aa915630b79d070ffbeabe26c39b6b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBMA22443547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7286225996feab8e9e5da988e6e3751fa4c4b34475d5bfd741a906948efe855d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX53U2351691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeaa248184ed303f4890026c0dda2213a34d8c1600efda57e45017d768e0739. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/GX53U2351693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b395a24f067ee98bbca599a95ee434801b2371b9da764ad37506f0aca1896ba. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/UKXN22576842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba53f1bb61574e7bf5deb06c06b5fc3c364d6fb62cee67b3bc716bf6b793d46. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GX3Q92515540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9e5b9c43c84122b0858c8218951833f01fc79211eed21e16cace0285c71fc9. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GX3Q92515541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f2a9e554e5fc3865da520f3c71ee0ce7bee5715865b35fce002462f226be84. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GX3Q92515544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b63b13bd436ab9aa1bc7be0697590eb091e4e05084de2ec26ce4b97e913e40a. 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/GBMA22470783.