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 0x9a01814d18ed4c48dd1ba31f36865fe77a93155b846d7815699ea474813feb4d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ba20760-8ee1-42e6-9c3a-ecad5efc6e68.json and https://artists.proofprofile.net/proofs/artist/8ba20760-8ee1-42e6-9c3a-ecad5efc6e68.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 0xbb68971e921bad97f3c5a3e435d64dd861f0e1a599fbf3e069f719b55aa3c04b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWV2094531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99809f5a327d1aa4876cebe0cdfa29eb739601a8aec1fcc5141535f28d0583d7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:49:20Z), 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/QZK6P2161147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a9cab4b35e8e00eeb93d74525dd219f337672987a7cb66340761de9f39b9c9. Chain 2 (Bitcoin): anchored in block 957961 (2026-07-14T05:58:47Z), 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/QZNWX2144488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbe4ada1f0130012e4b1634ca046e7039c5acd16eb7e92feb44b13b39a658c6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:36:00Z), 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/QZRP52179185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5cd9be376be82d69a06c98e5d1c9eecde81c2ff00eddd0fd83e9a9035b3817. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ62265591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b0caaecef7f8ec6ce4585b6a8fae6de8adc570393797ffd09a8a3bd494e577. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFZ62265595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac6294552b80dcfbe0f8cd095ee5148a3cd277661813cbfc1011ed295995545. 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/QZFZ62265597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546ca1b0191627e1a855f875a5b5aa061f79a96537aab6fc6d2666751a08016f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:48Z), 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/QZNJY2395511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4410c393755a47a349ad85abb02b7cdd14353a61f3f4bd901a81aa4bd69d3aea. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZGLS2450024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebf13eef913f5348de4a360b627757a107669e2fe876447a7b052d15215bb76. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:05:00Z), 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/QZNJZ2415325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dc60de9817807eb413b95f093d7f185fe71b4a1aa6784193d1d1d3bdd9bb33. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJZ2404447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7a887fc55a93c4e40d9455ca52e152e862ea2d641c8caa18dbb41c9ceb836a. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZNJZ2417015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fc1266988d8ebf09db6f2ec2b3600acffaa715f4e8352c6c1562e75fea34b2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNJZ2417016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7e9a593ebad4fcb6cf924f286b40e09272f56b1c1ed34fe28a597f37d5bc76. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNJZ2417017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417201b076e00e75543cca6a4002c6869f83fa29216d47449836f9b8a34003b8. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZNJZ2404445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf464f89254adb932ace1335a85cac380b650aeaef47c3c4bfead46f1e72c83f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJZ2417021.