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 0x832c4b92b8a7b57b1944ccacfd6627ab8630669b27298c48c70f8a50b55f85ab. 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/d1e8ee74-046d-4160-81a6-04d1f42e8110.json and https://artists.proofprofile.net/proofs/artist/d1e8ee74-046d-4160-81a6-04d1f42e8110.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 0x7fba7777f32f441d427638188b7c1666b5692d3699aa09aa73ebf5128b4da2ed. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNWU2214639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d7312e0c53d5802686f95741df03f1cd55f5e7bedfced38a34d00dc005c0b2. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZNWU2214640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9ca57a330b3b0fd27f48f5aa1720fc6cdb96095da3c109484a51551491e4e9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNWU2214641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd921e52a67aeca9b175221093a9b8e1e38b2af411a66c07e31ef230f1eda146. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:42Z), 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/USA2P2343670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0206737d6d8ec468f4e07580440db9ba884e7808947797c828d256833120e9b4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:38Z), 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/USA2P2343671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15046bccec08813a46f662577e04245fa254fe86a39f10b25a47b848e4c1d6a1. 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/USA2P2343673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60c22fdf83855236b839faa09d264f6b4a541d42c4e5c5eaa79a4a075e3e036. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USLD91771966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeee3498f24de51f3e41936d2c8538aecdb8e0ee7b145983668ac6c618e5dd7. 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/USL4Q2488077.