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 0x9445b24c7c819b06b6e2ece951640e41bc1469e22a26ae21f26aa94453833d71. 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/26f67797-ae63-463d-ac5d-18f9a667afda.json and https://artists.proofprofile.net/proofs/artist/26f67797-ae63-463d-ac5d-18f9a667afda.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 0x167ad84987821c49b9ff1b02e12138e1cbf6bdd14029bfcd3ac76368b82f9ab1. 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/TCAEG1962589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb341a2246e61d8541ec1d6a0a80fb6b9d8fdc8e650d0c69e25682522322d6d. 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/QZHNB1957195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2411675d00027aea24c3c9a29529a710307ee4435dd25692ef24f51f6c6ef90. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:32Z), 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/QZHN42025309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd217b82b04ef0cdadd39a02e5219fc015ab723f6accb88405183c2f65cc165ba. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:31:30Z), 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/QZMEN2044575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3a45e37216f4420bf3cb5b63675685390ea36c4dc035afaa3122e2f15f543f. 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/QZES52050020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde494bca8bfcfb6bd626d42f144398f18bc5162060d2ed439ad671d1e1be1365. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEH1981359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab74e8f7674e589917c71a09644fe16f1af44988cd2a8e70d400bfbc8b144d24. 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/QZTAS2153838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d1cdaf8c27e37d58ea1b30e2cb1d9bcbbbcc24b8f7cd4c74dbacb4e2e58f0b. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QMEZE1948745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa766441fb6b2d00c703962f5618ee01b35d57c471b3537d7f5db6521208897c7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWS2185713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c7cf839b9bbab7e45fd0e5653197d30d51cbbbd5aa08e548657bb6683d206b. 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/QZDA72388717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bc03657244745aa87fa4d54078a7a133437d4139321073a42868479069091b. 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/QZK6H2396521.