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 0xfe6c2d8293c4bd27d2d99a7dfa430b0149968ef05a16f0b2834d69ed014930ee. 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/64668fb3-01cc-435c-96b6-601a2f8daf0a.json and https://artists.proofprofile.net/proofs/artist/64668fb3-01cc-435c-96b6-601a2f8daf0a.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 0x5e04eb7447a6114ada48285ad59c6ae4a2aa95a0a4507ed22daf92b7d2d2812e. 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/BX3CJ2000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd639ae10186d2edd5fa3bd187861c672360af9077d70a3c565cb12a91fa6e6ee. 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/BX3CJ2000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000beab820bbc50a6a5083cdffca5277d534afda69b17b5f6f910d5d91c57efe. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/BX3CJ2000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95665d0a45e3951a3d2c4da02cdc01ac5fa333b0ec6e44258292ca9ab64f830. 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/BXBLW2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e259f74ac8aa3d96340c02b10addfeaaaa5a6bbda02f22b7c2e5b59efe75a0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BXBLW2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5995b79eb3ba36f92fe6046283ba5577bc98b892a8c0abf6c76b3219b1562952. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/BCPP02100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d4edcd9d3e5582827362ef2b3a1f7c22088acf4e6e571980d3b307c4878a13. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/BKN6O2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecbcbe57e612312f6bf4d45fb7c4034821393edb65d68bdc3d8fa9ec821e0fc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/BKN6O2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18d3b4d175a35784db57ef93d0078eda77bd5d40cfed44aab9593268cd4f031. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/BK50E2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c9771450e4f9ce6ea3542104daf66e35d5454844e7987cdc32a8b99301431d. 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/BK50E2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a928a7a267701c6806b4e018549e438f5d9b7b1921598876f248974fff84c4e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/BK50E2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b1f68dda5b90d0a0577d58314339879a09311d0d2f3bbd106ae4adb71b99f9. 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/BK50E2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b62c3c772a2c28fb2a59a8769de1cfd97636937e0e100809593dccd985dad4f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BK50E2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf94936ee6e81deb270573adb3dfa6224ab9a3729fc8a3ad51deddab1c2adb55. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BK50E2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b1f68dda5b90d0a0577d58314339879a09311d0d2f3bbd106ae4adb71b99f9. 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/BK50E2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b62c3c772a2c28fb2a59a8769de1cfd97636937e0e100809593dccd985dad4f. 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/BK50E2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18d3b4d175a35784db57ef93d0078eda77bd5d40cfed44aab9593268cd4f031. 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/BK50E2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c9771450e4f9ce6ea3542104daf66e35d5454844e7987cdc32a8b99301431d. 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/BK50E2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5202415b50b9218393e09b912fe807fe6dedbeebd17568a9e52b9780a0dfd5f2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BK50E2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a928a7a267701c6806b4e018549e438f5d9b7b1921598876f248974fff84c4e. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/BK50E2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b1f68dda5b90d0a0577d58314339879a09311d0d2f3bbd106ae4adb71b99f9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BK50E2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32776fd25d336968631306a6b14551367e5b11433d9e351a8a521b62fcb57e2c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BK50E2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b62c3c772a2c28fb2a59a8769de1cfd97636937e0e100809593dccd985dad4f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BK50E2400008.