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 0xd66563f4ef7de5efd55989fd5e9f0ef6329ba80561a4496920d402653f37109f. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9af7065-ee1b-4b58-9e06-5bf86efef73b.json and https://artists.proofprofile.net/proofs/artist/b9af7065-ee1b-4b58-9e06-5bf86efef73b.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 0xa34844f60816630dead2fe15f70a3cf72a2e1844f4ddf5fbdcd94d88618dd03f. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZNJY2037592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9039fa90bc6281b1f1b68c4c7a90ef18b6ee215dfe520e4bfe8c62ff79cdc0f4. 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/QZNJY2037593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7893efa3776213c211db4b1ef9d2a32796bb39bada2343dc120c3a8219854564. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJY2037594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb94ef7b479e43234d8c63b547a8b1f94bb1f4e7e4f74350c349626e304da10. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZNJY2037595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5090d22200a943c9ff4d926445b1357d885047eac955f89ede1d2d86fe46e32e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZNJY2037596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc023245b056201cbd2c612cadfa561de3d5e74c8d5d44a14b414b337702041a. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:38:22Z), 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/QZNJY2037597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe7c8918e35a72b3aee5e0fa3b57bb0f603defb8d58d1da290db19e223a6c47. 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/QZNJY2037598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60884893363dc9e79659b2f6cc2ee0ad665f216d228f850fc15db4338ef8afd3. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNJY2037599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86080f9db1fb5fb3115d2a5fdcdba49db2dc91052e04487fcf3f376e95c258b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNJY2037600.