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 0xb53bb7d1cd923ddfa3dc06a11f9a9ee2338d3fc76f528912cfa94707812ef9f4. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc148dfa-261f-4cff-8146-6d8369a69852.json and https://artists.proofprofile.net/proofs/artist/bc148dfa-261f-4cff-8146-6d8369a69852.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 0xf1f41817bfba87fbea7fe22c8bb5fdf98029d7e06d81963b0d4d4b3cab67c12f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS672108619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e42a4eaa1491f281f35bdc16f991b30ca545bd23202a409926e86cda80d6716. 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/QZS642101630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe834d30eabfbcedbc44b5f011abfa8077d4c409a982d05a843938efc0c4f76e0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEPI82109985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe045ce64a83b791927e08ddf9a8913cd9ea11db6ee47b15bacafe6aab2078234. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLD682104670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e86db57868e720ae3ba414a64c49c3221724832f8afc93ab71e02f416acdd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLD682104672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a7ed4573f3b4637f2e7389c1ee5ef177f1a9fe9925fbfbaeda7a2249d0836b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLD682104674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd07b8d4e21dafed17a52b9f68f66ecc868054709c1724b30c762ac624a472a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLD682104677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c2f541063c2bf34b4560b9f2fd01d852083e611019d0afca4b493ea8cc1ca7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLD682104679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b40e3a6d8f08e1f4f2fb4cda88da849f2bd7ec36b85f9a6bb727aa699310cae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLD682104680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419056d49b058b39a58a6cfd68c3c2828e14af743fd3fc1966bddac37b75f991. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLD682104682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c00a507c030f22afc7da6eec8edc807ebfb48bd33345983b11f51c9061d8e4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLD682104683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df8b1bfa76c7e37980252b9e83cf6735306e5e47887f012ffd456caffa9209c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLD682104684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941df0d280a251d693cc9fb3efb1bbad4e6f5438f6f79e18528715d9e73c0024. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLD682104685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afcec38a119d078f04618e3fba3e2e31484d5660f11edfb789514d92c03f261. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLD682104692.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9028ba010a11d02f4889df183d9f861d8b5887db11a6b0f793e01ff43ede0a1b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2306938.