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 0x086f07bd2d20ae1c91686186e30d9f5269d18647169eae692f68e0e953bb1552. 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/45c5b6e2-7da5-43a8-a029-81760de6fde4.json and https://artists.proofprofile.net/proofs/artist/45c5b6e2-7da5-43a8-a029-81760de6fde4.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 0x52975eb8e7d81ca1986b77ff225db43ea47f989ccd5ee99a90217304ca702b09. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/ZAQR41903738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f331559763cd30aa7dcbbecc8abd04b956621446f79e30e03cc078dcc0772d9. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/ZAQR41903743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60d43a9085129aef325fcf46e13a680102732600d6e34e3f7a9164f9160a9e4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZAQR41903745.
Zak van Niekerk Keurspel: Ek Sê Bokkie / De Aar se Bar / Ramkat / Byt My / Hoeter op die Leeuplaas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7ed04955ac397083119e4e54fc82ba025ac765b908545fee1af83199952a0c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ZAQR41903748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719eee9c9789611ed1b9394b09b7ec9ffb5c565c1af8c3dcc1844e9af46f9f8f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ZAQR41903741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f331559763cd30aa7dcbbecc8abd04b956621446f79e30e03cc078dcc0772d9. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/ZAQR41903743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96328f80bc7c0e8edeb4fb57a11eed91c0d706d331d0655da54fa0274167067. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/ZAQR41903746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7ed04955ac397083119e4e54fc82ba025ac765b908545fee1af83199952a0c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ZAQR41903748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc76b178c7236932c255978299809fd6f4bfe0e48331d5f47c4fc0c0ebd499a4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZAQR41803549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330b4258a24c92c1c39ae56efdb3999fb67c23b0b9a0806419abbe0fe848faad. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/ZAQR41803553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e8c5c5a48cab0caee581ecc35409ce9cb235df39407ec8542b867dc85d3653. 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/ZAQR41803555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388b99e3bd53680307701cc024933ee479f0cebede1dbd278ec4a7340fbf562d. 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/ZAQR41803552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbf8462a5a351f4df0df91b4befcfdca46c79c14722e99dd7647db7ef4ac495. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAQR41803556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fdf7ce312e69bef0703a6dde103440c0c49728f17e34a32cd30598329602e0. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/ZAQR41803558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcb54a0e965d4f1e0243e909556bdc2e945e4efabf7f951a9a4430b3060c392. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAQR41803560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8525f6da5fcb6799a4a4cc5cc692bda62d0cf094732513b9907344c25032c008. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/ZAQR42300612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eac74274eaf7c1b92ed04796cce029cf3ef27286e1bb35b507443a6f8d89c5. 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/ZAQR42300609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf23ac5b910823ef3ebc76843b9cef4be292c87353794086c7b9d739011219c3. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ZAQR42300613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5f65a23b522c985a0f554db3b391a37185b98a85080977ff8d77ad192776f5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ZAQR42300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5f65a23b522c985a0f554db3b391a37185b98a85080977ff8d77ad192776f5. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ZAQR42300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12812b4e633a4b1e23e1ddf849d53cdc33391a7bcd2c158a156af3938fa93642. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ZAQR42300611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cbf9edb86211f3e421cadb6b845933a012e03d060debefb8eba1fae788011d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFME1588990.