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 0x25cdc2bfb2fabf40ff09b57fccda0e729a908e64253967cb9145c9021ad5d07c. 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/225fdfc0-886b-4f41-bb2a-7ac95fbd1b3d.json and https://artists.proofprofile.net/proofs/artist/225fdfc0-886b-4f41-bb2a-7ac95fbd1b3d.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 0xe63c12bdc5b48959ba3fec19e94dc68f432c2a3327a5ddf1d4ad49962f3b3ea4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZWFE2360255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133287541657e38b9d2e4e050b1eb9fc341addc85b841c50dafdc476e575d2d8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:01:24Z), 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/QZWFK2343722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e09aa945a06d412536a1fbde159596a54fa2c04161e2a5535b7e739dbb57d2. 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/US3DF2402306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5507f0836aac49085a209bbdb21826ee1f36dea7e07524e14f77d63005e37452. 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/QZHN72411833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb774b1397abaf003239c976d72fa367d558d527bfd4407218a03e10b54f123ed. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHNC2445746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9519177bae002762358fcf1a30ae7277ba1c94a5243df54152ff4ef73e2c6416. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3DF2473296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf983483a4509bded743a0491f938d25bf94f21121070da8764342c05ab23e8. 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/US3DF2473299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39337cc8f7c56ae561161ef483ffcf99709fda2621459a2242084673d98cbb85. 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/US3DF2473303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f38308291c3ed846500ac96d67653b442d1b269d120292a6e509b28b66bd6ac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2473318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a0ef063745ab46c334e71da90f2da70375f62419f2931b3777a7563149ef23. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USANG2429094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f238252cfb7ae48d858af43c238e987d8edc992a5e1ec200036342c4dcf565. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:44Z), 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/QZZ7R2480480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdfcaca5817327b3cfd4731304ac36c8175cfcb04ea66ddfca41481268487ac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYY2510644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95563242cbf8380c6615d6a80f38396645c620ece5aab3eb0ed2dbb430ca5ce5. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/US3DF2522612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2893f9d4c797f4a401e1343cd086757c7048e1c91140e579146886a80b4a1a6d. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/US3DF2545711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1212447d7ddb43d16e0aa2ba9d83e481f27eb3b0be330db2ff88c8afa9a616d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:03Z), 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/US3DF2575153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951cd5d0a3579cb8c36745f390bb0d9a54eb96c237858f3be36cb228e03aaa60. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US3DF2575161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398f4291c04e6d8e626835cce36b475b215d46a3d1d7946cda03d651ca2a57f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZGC2502154.