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 0x77ad4bfd5b4fc6b5f509a522ef78f2cf673a33b3a330b6885a40835cee281732. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd46c02f-9f80-4a48-b8e0-31c15cb1a530.json and https://artists.proofprofile.net/proofs/artist/fd46c02f-9f80-4a48-b8e0-31c15cb1a530.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 0x4c393db48503a6064e825e50b1fe9dc34db56dfa49fb477626519c85567f51f1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ792465105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f7acf4bb1770fcb0adc976350893919a69537a1b5747acc321bf1d73868dbd. 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/QZDA82574033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dca36dc25230921b0d515b746690e6eb2cf36510bdc934378360011b7ca507. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZES72514739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49976a5f1d3137c08da6e63160d35d21728463fb28be4a83fc60d85289a226c3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:54Z), 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/QZES72520928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf7cb794407b8be71a533a64aa21a6af042efdf5599ef13055e7329695d296b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN62564005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbf4692365d780c25c1352dec9b37dbf1282f904e42ddcf1c7db6c59843278f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:55Z), 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/QZMEQ2506198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeba873f819156ce41985d162fd7b6a4d7ef7beab50fa8972e0fc63ed83d659. 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/QZNWU2583320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96957a472bc430dbf6e3f596ccaa27747e3db27d5b94075564a5147d32075071. 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/QZTB22543688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc087ece35903ee3d4e4a119e344b53f8225fe7402f350aab37c826b6d7f1b7d1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:40:06Z), 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/QZTB52564687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a23e3f64999f047abb59ef02651e03a750f1d33a7b747acfea5c97e7db2ff6f. 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/QZZ772594528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9709d85d2ccf887e60194039145ac372935e258c52f7c0559614d75d9755b98c. 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/QT3FA2568794.