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 0x19e5eef977dba641dd3c4ed81361a3627fb36b4251f88fce39b0493ac99105b5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48ad19c5-2790-4bfc-8c9a-a1b8741e57d4.json and https://artists.proofprofile.net/proofs/artist/48ad19c5-2790-4bfc-8c9a-a1b8741e57d4.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 0x8ec588888225690f917724e21c378af1f73fe4a71695edd185310b3c6c784241. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZTBA2389503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dee118b7d941644bf4bc40f0fde8acb3ff23972b8015c7a9cd53131f95f6cc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTBA2389492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865cc8016f7a4ac44e3307cbffd378882af5fd6cc8c85cccfcfacd7636c64776. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTBA2389501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d84823863fb56924f34da0e8587a50f8d1d8f5331137da3899581c88575b017. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZTBA2389491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12a8b73ef94f7d03de133f495b72915d808518835b5d9665a647a70d1ec2684. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:03:48Z), 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/QZTBA2389497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88912c07df0d59e4b632a40abb2a2054c9be0fd9dd0a79b48e39424b2414b7e4. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBA2389494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d61a03625f6acebc7c78912f1f8b4f2a0d07d5842e026aaab8d2a345cc7ba6. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:25:04Z), 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/QZTBA2389500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19bdaeddc825d0bfb493a70f639a5fa34c0acac2bb10e0068cb481e068366d3. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBA2389502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fe5f4a52d5aba77b6c353dc9985ea99b4fde97b975558d37a59fd1b05caafd. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBA2389499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d83c940ccfc8d50505186ab512bf82e50b643785cf08d63a0a55cbdd3a21c2. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:25:26Z), 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/QZTBA2389496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f0183b6878b537892c0beef25fb36e3fd58646324ed0b1d77132f41060542a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTBA2389498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832be0755ec2455b23aa53f30bc62303d645440897986865858b3c1048e756dd. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB62443384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62a956fe65f47e8ed0c46dc59c001cd7fba3ab7c15e6452ad86b7f9908748b2. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZTB62443360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8473b2f087e4151bbaab1a259a64109784c7068e1e58f63b19072381ed6af28c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB62444630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af3292817115e3fcf360daa297c7f5438b5b28252ee3c3702faf623ad384d65. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB62444629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec950873184e1929be275f8fa132390b4a1c90e81b6d51c87b35297f65ceb7b7. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB62477095.