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 0x6d0cb2570485be5497fd726a8d02669a43385bad9ed60f3b9e0d70e3ff83ae0e. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4a53bef-f781-448b-9863-48cbe2f5d0f2.json and https://artists.proofprofile.net/proofs/artist/a4a53bef-f781-448b-9863-48cbe2f5d0f2.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 0x2c5a8fc83d8bf1aca54c15ee8ba640fcb3fec03042aaba1421dad75e4e4600f5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXD7G2545330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca16dbcc5a8ea84213842c9106047f3879f27750afb8aa3853e2bbc1971d7d56. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/GXD7G2543211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe420cc6dd945b990beafc98a70760204033482f4c72ba4e857f1b8fd496a3942. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/GXD7G2562724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1675da8cb23158b7f92e7fcc41e93540385dc1599a0a179819ea5ef33a81b30. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXD7G2541037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccad1a78f320689c534796f39788e145378744d342c8f968cdf22e39e680324. 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/GXD7G2544639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd32016a633973cc8c0137f94827a55846a9a5c2748230550dbbec941b0848a. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GXD7G2575867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15f5d1ca865e45efb0936f30e4eb2a2187780bc495ca6e211829735f7a82df7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7G2526160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451d517fa2c1e305fd2b6e477d9d67f8cdcb6c5f4080e671138a78d579e53516. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GXD7G2562696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd0fe98851cb78e221fb33c7d8202d53be42b8bfad10c9bb5fe337c6711b528. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GXD7G2544096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc933396af0cb74f7f4f05e6d9fb080fa30b9bd07834b890dc6bc73655c066ccc. 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/GXD7G2512073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d26cc7db2af46df15fecac2917ad6781150e3f21b29876f4e0d3ade7b81699. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7G2542101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc58724f840a68e19fc88842e1f5dd10af689addd163f04828106bde1f37e3. 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/GXD7G2558732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6191395ae0ecf7f8d539c2b27dc2346233e2fa67f49a7972937e84eff3e5e88. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GXD7G2576068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc995384e84dacc9b1a39dcf4b44f55c36339d902bb36b54ad3ac760c718f2bc. 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/GXD7G2589690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ca3910f188723df550a0f59ec3bfa227128745e69f5b4a1af9fa70b67e8db8. 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/GXD7G2581310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29207e4e2172514e4d0f224d6929e6b70976923b7fa4bade0dea190d71e4a62c. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/GXD7G2563722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f087bc81291d58d834fabdb08f14228cb02f4035eb3e662016642b1d70bdaa. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GXD7G2520231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b42228b6e0be723c5ea3c804d4acb2eb03d7e97faa0df49b54a10b752ece7cd. 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/GXD7G2596171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdffab016d3f42032afc9d018c43cd50b005f674855550eed56a9bc369567a9d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GXD7G2531941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ac3e2093e213e0031257ba7f00f42092d7a219bca15a43826661c1e9e90bb3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXD7G2538559.