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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf753c62495e4ab7d83bbfb55fcfd680c39f0222f3863573d522c5a99a9b97cec. 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/df59964f-27fa-44c7-a076-07d9c7da0836.json and https://artists.proofprofile.net/proofs/artist/df59964f-27fa-44c7-a076-07d9c7da0836.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f548c4dae67c85f6274ef5b953dc037e7a9eb9403f008576d09d3aa41fe88d8. 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/USUG12003768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238561264eda696b8f0bef3fa2f9f3dfa42549d3c64e41d26b115c84cf870a26. 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/USUG12004015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f548c4dae67c85f6274ef5b953dc037e7a9eb9403f008576d09d3aa41fe88d8. 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/USUG12003768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae78e3a3e585f9d967cb9aa67c73fb4e5ca8e32d20fcf3e9320de6901f078eb. 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/USUG12004014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87491b2f456eb4df6bf182f4e7d292746e25a8264e960327a80d7ed1ac768845. 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/USUG12004018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e6b28c77743c5f05a1c15113ca12513db1ffafcb9bd00807e1b15777995dce. 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/USUG12004016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238561264eda696b8f0bef3fa2f9f3dfa42549d3c64e41d26b115c84cf870a26. 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/USUG12004015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5270526f5d93508cd6e19a7ab6279e9048c6a511ac55083b87b187727a3331. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUG12101082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5270526f5d93508cd6e19a7ab6279e9048c6a511ac55083b87b187727a3331. 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/USUG12101082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f548c4dae67c85f6274ef5b953dc037e7a9eb9403f008576d09d3aa41fe88d8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUG12003768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfb33a6f83b1c5730ea411befbc9858c821b5ff1889ae63f4d5abb39662c8c1. 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/USUG12101693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae78e3a3e585f9d967cb9aa67c73fb4e5ca8e32d20fcf3e9320de6901f078eb. 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/USUG12004014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31e7ff7ce2285bfa9ca57a88d077cd0e8dad429c0cbdff61e48fd9330395d74. 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/USUG12101694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87491b2f456eb4df6bf182f4e7d292746e25a8264e960327a80d7ed1ac768845. 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/USUG12004018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e6b28c77743c5f05a1c15113ca12513db1ffafcb9bd00807e1b15777995dce. 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/USUG12004016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238561264eda696b8f0bef3fa2f9f3dfa42549d3c64e41d26b115c84cf870a26. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUG12004015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebf178daaffb3a5651958a9bd2b21522cca04f3cc7b38987c5b77f0229e8a2e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:46:23Z), 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/USUG12101695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ac86e67b97c4c00c078be29658b795f58ece9dda3d30a7fec9d2a23173c104. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:51:40Z), 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/USUG12101697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8fce1ccdd8d9d90e79ff926b16b39799c7e6caad8fef0bd6b2f67e9eb979a9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S2301975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc307a7b9eb91aae08326e5bccacd5874a97bf40e77a8576f3f03ad0d5d400b0d. 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/QM4TX2266450.