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 0x65f38652fc2ed3ee6606cf79d931e1c46ccc4d5bc38924b060fe4e570190cda9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2405fa9-3a63-4a7a-810a-5fffeca3b89d.json and https://artists.proofprofile.net/proofs/artist/a2405fa9-3a63-4a7a-810a-5fffeca3b89d.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 0x67e221723c800e7db794f39dda904ec81dc98f05ade740b5a7b1444e70469cec. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/PLUM72200975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228ef3be1e77e793b3f7bbf451d204b682d4300742d5b6c65405cb86f9d6d9ea. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PLUM72200976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8552b009a06db327b8035af51dd283806dc1b2c7621654631069d3a2ef0be7ae. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/PLA552300488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5be9d418df5125fe33b96ce097bdad8220930a6a2d2de7e42a8aae40f76ea8. 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/PLA552300580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf717270ee3ed452483dd251635a9117e0eedfc653d2c5e9d9f0231960f14ca2d. 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/PLA552400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802a4b1fb26527c34c79fdb770aefb1c16b9ac5878b5ace2eeb80cf05507216e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLA552400311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0be1c91182899f610e72d851427dcf7c8771658826702b229638eaf288b7812. 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/PLA552400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7830b6b21fb475c5ce0df9e8f08a9bd45259eb397a12cd0b573363bab08733d. 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/PLA552400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a930a5965a0426a5724bc66826f5749088109bb45ae6d1db4b067cf494301b9. 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/PLA552401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada764f8b23c66bb2d98e5aba5c84195a70cfe48e6f88de24bec08974b561d98. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA552500163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ea18f6d0af998d83a1d89385969d5adfd7d628f54247b5b89e48169cfbea04. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA552500334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fb9218599b0194e246baa514014a74fd1a355d74295999dc4968880f094424. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA552500447.