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 0x83628a1ab89c5f8c31ed7a4cd2df215f51fe2402c60abdcf4e4749a76cec7d5e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d925e862-2e4f-418c-9e5e-df14d5566816.json and https://artists.proofprofile.net/proofs/artist/d925e862-2e4f-418c-9e5e-df14d5566816.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 0x7690157cc34d31e11309673e3d38a0dae2ac42efc06d4c64e21ed9b112362f4c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RSA221813621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe76f1f9d09445c02c6da670145ba648aa5de0681535de1ff029cf4bf590d333. 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/RSA221813623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a999ac0839d4183360612710c7c9bfbae3af7e5b6791c915baaee01fa161d2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RSA221813624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00180953dec598f159bdec75f7861547a9c91781f9334c4ecaf860e44d09557d. 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/RSA221814388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4feb03cb67d54a81d9548b370dc986b6bc42e1647619a0ff7b1d6b6747e52b9. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:43:28Z), 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/RSA221814393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82ef1bf18631fcff22e3cdf79471f93eaac976dd2c8d94119c0358621499b28. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEKB72533165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce66975414a5dbd880e5aa1b8103f6fe99f3cacdadac1e346d3a4cfdbeaa545. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/DEKB72533159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad49f7b142e22ed0eefcc112ec2337f878359151ee948f0c5518d65fb847c67. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEKB72533160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96ea1d98262bf8479c09ea832816d4e02628664fd43ddb42207857d37e02466. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEKB72533163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444f90869097fac2c9560799f4267a3b66ec4c80ea45b87fb8b6f1ba93107788. 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/DEKB72533157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79869862d9afb95dd118d235ad73a055879826ec4373c3bdf4a0417ff55d318e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEKB72557141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7f26fd8c762ed95ec0ced2e72916930c6096b04dfc0dec132738ee6d22e126. 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/DEKB72557140.