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 0xedff81ab4ae9b60bff7df5387895602652303f5d44413e723be2b97117613d8b. 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/7ff37350-3738-4955-8b7b-d494dcdb038d.json and https://artists.proofprofile.net/proofs/artist/7ff37350-3738-4955-8b7b-d494dcdb038d.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 0x6ee7f1fec93e017ed8ada915b750329b514927a3cf0af88d8f90088679b2c23c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEPW21272073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2d8a7fe932a80f32c0510ba321b06e4381f3f16912464a1f21f81bed98eb9f. 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/DEPW21472136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e7f4aa45fa3cdde56ee80387f1952db9b88d61c4f7481d9f74de7d8cba74af. 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/FRPAB1703001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1f81b105652d547650683006fa43e898a2565d14bb9805d1ee83e118f45d81. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:47:02Z), 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/FRPAB1703003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87d4719cdb4a64ecb25887a8a54e77dd74f8f1167d058503cdae1556a46c1ae. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:35:06Z), 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/FRPAB1703004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a2854b81f1622d13f18711d3eca3841956eed194b2594608a7322f26c31afe. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FRPAB2007006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe117f75cb9e1e4d3b87eef44d542d52af631f431c73516e020713f4a6028e3c3. 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/FRPAB2007007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c8f278f68d74bd0010b9abdf4580426578707e87dfd5fb88d83ac7f82e7804. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRPAB2007008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4925426c7e320c761976a61565598187c189a6e8f39dce87d55261f67ff1443. 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/FRPAB2304001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7354840850e9e363e4b8209cbc7469cd3c07a05eff0b6ba3c964a17845b9427d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRPAB2504002.