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 0xb98e086a77d727cb8b7ba65133fcbba33f3da2d87b072993c25c3d883b2cd72d. 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/99597574-adec-470c-b85f-3891e7738720.json and https://artists.proofprofile.net/proofs/artist/99597574-adec-470c-b85f-3891e7738720.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 0x4d4891e39d228e553cfeb347769d3381219acce55357c8513e0073579c4d8d7f. 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/TWU712002533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4ad0914416d71e2fa1bb93627a484962d5d50246f5277058e50b5898f4afea. 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/CNZ632300643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97384b4a669add67006a34afad57531d7540fc6fa2828d01001fecf24b095c24. 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/CNZ632300642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023ed880c632220367d70b0fa95014ff6dba244e109fa9c23ad84da0771467d5. 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/US5TA2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee501709d9aa93a63fb90f268b0d2eab3236c1f1e91479abb94004f6c73fbe4. 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/US5TA2300193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24512e1bad9ffb1c504b1bc8b1bdf8f5434a5d5823008cf69dfb683daf5541ac. 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/US5TA2300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b36acb5bc81893c80c1a136910edd9fcbad4924010fc48f967b04c5b8c72e5. 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/CNZ632201661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6f3eb11f2cb9cb00529ff6116126457d683bb28487e910d0bde67c506b6512. 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/CNZ632201411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9967e56b3830dbefebc36555298e6a1316caf1ad38a02bdcce1eaf9573bbee79. 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/CNC072201857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcdedd53f397bfdd35170b04fbc03a014789311963ba1305bd382f6a51dafaa. 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/CNC072200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c45913fcd29eee6a40097720d2b6ebe68df17b450b1b0c7800d5d3fbb3f9562. 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/CNC072101459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7e222a7038378feeb3897fb2b9589cfa017f83ae7461997eb0b941da78668a. 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/CNC072101460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7e1c0724d73b55a2d625b61c18de1e24ceb56f452d6151f0cb5cc6583c484d. 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/CNC072000852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26d56bd23b0e157ee0be35296d7527dad4f45d79210df7b9860998e3b5f5887. 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/CNC072200904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdcf652a9430f42e1d7eb0fdd51d7c7a63f07e55ee2cb1a32419f33a9cc59ac. 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/CNC072200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd16efa497ec48e43ba631b1fded238654f8649fba343f9a5d7a844315500b9. 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/CNC072200179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ab63b40de40486870ab7a6518dabae983a025eba936d1dbb1d9c30ddc6cfd5. 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/TWU712002532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b8ea520054c7f57c05bda9ad14693c2bcbdbba7a4690f554bc581e3f779804. 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/US5TA2400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7a80095a82dddbae9433ab04da54164d13daba820c7b649c8146163a80cbd1. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/US5TA2400353.