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 0x3a9b973a9a9cb36bc70597a1127526ce8ce5e36458b85acf9cef3078fba913c0. 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/c3b8dd10-f146-4ff4-b0aa-1220c22c2b0c.json and https://artists.proofprofile.net/proofs/artist/c3b8dd10-f146-4ff4-b0aa-1220c22c2b0c.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 0xdccf824b01581abacfb48793425c9768889a8f3eb534ae41fa9e877c14f6c4eb. 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/QZHN82106358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a536a01446605bab88b9e60d2ea7ec5246c91aed6d3f099f16e72fa7b6f97d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYX2225052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7857cf6daaa1557c13ffa3326622b80b57ea3b7c9bfc722bec6aa71cb2ad6a2d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2228025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b55015451957a0525776d05edeb969c06aada2d334e3f2ed8e52b6bd8652f2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2228054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5078b13375d819889280cbf0fe97c2d7316357224167269bbfbb2c212fdbf00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW2228074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eed9143fc88d566ce403694f1cda444e6859564fbf8ba3afd78c00ba680d629. 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/QZW9L2366140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38e5d88f4393409be8e9cfd5e027771b51cbc604c1e0250297fa89c20644cf5. 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/QZW9L2366143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054ab3db942dd8619c55346bfb54aa0d7abcf40493e83539814fe81932c08141. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:34:14Z), 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/QZTAY2572458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b5b8701d42cf91e87813c972521273f4b848d173e7ef6ec60c313ddd80e665. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZZ772578558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5460c77cd1f9be9c5035e69e8e44d754b43492331854969f4515dd19f7a22f86. 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/QZZ7M2592580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae7ffb5d292cb7e4e5d05e712a1408bd15c5d5479cecbd6f84eda17f2e0d84a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7M2592241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c93457eb5287445c98e851764637f3874c2241b04c7a0e8590764bc89c9fa41. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7P2547036.