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 0x2723852853407575b73ffd64d1edb7b141bc7e5a7683268446ea58d470b31309. 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/04b9f4c0-a820-43c1-8efe-17815b353e2e.json and https://artists.proofprofile.net/proofs/artist/04b9f4c0-a820-43c1-8efe-17815b353e2e.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 0x1deca1bc647fd54ffaf10263e79c0f95b802b7e5bfcd747539ec11c3ba9d5d69. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6M2275223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8775ff65312bda043946ccce0c58b6074d871ca53646026db1c67d7f25360b8a. 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/USLD91741130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1deca1bc647fd54ffaf10263e79c0f95b802b7e5bfcd747539ec11c3ba9d5d69. 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/QZK6M2275223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a2167b0bc22e8e6b451a452a57501e9dcb456dc0c6a91ae822425452387e2a. 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/USLD91741131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5c8489ec8daf308a693014c0b8b546bacc63851f5ebc3bf1121496f860c180. 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/USLD91741132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0ff7b413d30cd1feb9d65d88c099c4fbb655d35ac7e8122fff085ffeceab5c. 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/USLD91743384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c83bb4075f8f497366b2f806e95a6d221d6a04af08123947549e09420014772. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USLD91743837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd156c6b2e9b0680fc83f7b3ef8b9a4274c8833379d4014e35a43a48a59cf4a. 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/USLD91747753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686445793e15dc99ded71a46222737c3e26429db20e980a232df160bdd6b4865. 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/QZVEM2357017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272f7de772ab77121d3236dae3160ece7cbbdfdd5dd8ee58d68c6a21f85d335d. 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/QZVEM2344381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c940ec956047733f5340c624cccb14b5f63e8159ca2aab9bdf1201226119c0b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:13Z), 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/QZVEM2365152.