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 0xb4b048af24cdd3e3d63a0308a3eb5e9808117faecc7dcc0c5d01327b40ad25b2. 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/2e0eb553-46b8-4e4f-928a-0663190c8376.json and https://artists.proofprofile.net/proofs/artist/2e0eb553-46b8-4e4f-928a-0663190c8376.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 0xaed2e063d834addc71d9fed5531c07e53fe56993dae87c3c86ffa22279cf18cc. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBB2573233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6841bd00b402828018876cdae78fe25fefe4469ce10d0849e099e0dae78e7ecd. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBB2573234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168d42b0adbcce28094867f209f23f37f9612294a6055c21503743830c88b898. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTBB2573237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666448d2b3f3ae191db89f7397b0564a86f61aad36880442e9b15f062111d0f0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBB2573238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7713a587375e0f8ba082d308e97325813440e7ec0b5f0bdd9818812a99e2f769. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:59:33Z), 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/QZTBB2573239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d49970c17b414a863d1a279be117786e2eff4d03753e7bb215d89f902085794. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFP2540963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847d4b0b10ba222a6865b6addd12e95c8c205e81d24f6fbb637769202d27f10e. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZWFP2540964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcf42283fcac0a0718784f288f36d981b22b60ae930f7e4cbeaf4ef0eae8249. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFP2540965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1657832fde323f9212d352e6b77f9ceabead9a3e5046827f60b73ceb9206f7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:36:31Z), 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/QZWFP2540966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99924a59661a20c4d187c477d0b6afb70e7326dcaa5173a955d5db5cf11360a4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFP2540967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15531bb5e97fefac5c8d684c820b5aff8b33bf4360fad679dab2a3ebbaf9e80e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFP2540968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79725cc8cacf56ca5bda6607233a7a94211805d020f10c9f50b24b084f727b05. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZWFP2540969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a9c6d31563b34d9141061f35dc3cc3a281cd864e481544d20ca821753d27f6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFP2540970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c4488ef4cc608da6e6b0ec7073c1d56030b9ad9a617e774645f4c189d010af. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:24:41Z), 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/QZWFP2540971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5146337455598f3e6165eed7f41ff590d961f6e05f293d1d31c9cceb2164005. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFP2540972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaece657988f92abb4ed94bdb396fcad5128eb19c6505011654456356a9476e67. 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/QZWFP2540973.