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 0x379e10cccb4de7f69a779330a53f457e6670622a0c01eb3c36cafaf3d0c4f9c5. 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/809caa6f-f8b2-442b-8455-5e69ae331cbe.json and https://artists.proofprofile.net/proofs/artist/809caa6f-f8b2-442b-8455-5e69ae331cbe.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 0xc28572445b29f7c5b1f959721ebceb441be2639ab8c9fbfda971fe24c418a9d0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZMEV2414211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b658237832af31a240993af66def373b24fddc46937d7b4a082ee020f4b9956. 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/ZA56E2305890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f9a80290ae8ac64652b6bc1e9c5d8e8bb609f162c878fccff636583fd455c5. 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/ZA56E2305891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe48471b393cdd91009034d728bc612cb2ea0f34fe77d72360457809491abb7f. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ZA56E2305895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28572445b29f7c5b1f959721ebceb441be2639ab8c9fbfda971fe24c418a9d0. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:16:37Z), 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/QZMEV2414211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b77a9ee0ddf2ebe1c2f7efcd91fa5af676f57b83c3e7ab51ff3198e715ebfe. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZWFE2320308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525b348199b4203e58aedb33874634935e0d279c03b8fa876dcfa1358f126fe1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NGB242401436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a63f19ae77447ffa1152a4062ff6bc4f7fdbb69483e53f889edd3067a76722f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:44:19Z), 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/QZTAZ2504907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065b005a58c980ba781a1e099449f23c9b9017f9b95f58c69b02ff3d541b526a. 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/TCAEJ1979859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5685fb27ab4d6ea2380d13f6a64bc0b0cc96c3e42a4be647580ced6973d8c717. 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/USUYG1296301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7196ccf9109e40ce50ceb8fce0c2ab7a7be4e5d41efb1042392b3d89fe34d18f. 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/TCAEB1925480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065b005a58c980ba781a1e099449f23c9b9017f9b95f58c69b02ff3d541b526a. 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/TCAEJ1979859.