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 0x4323c0ffae09880c5578c6f08fc5d172d31353637e6c0449ab388b7e335d51d1. 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/2c86efef-bd7a-4197-ba52-5d2f326ff62d.json and https://artists.proofprofile.net/proofs/artist/2c86efef-bd7a-4197-ba52-5d2f326ff62d.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 0xd1906f00f470c5c2cdc1909a9daa2a794b6b467a5511ec96e62cbdf1891a51c2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DKPK51100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b616ee268ddd2966fa1cf6311a4cb14ae4271b6bc5b9ec6560efc893099727. 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/DKPK51100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6deb992282f500f3ba24bf89c6d24582dfa36ee05b50ca5c297c60f217e07fe. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DKPK51100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308dc6f5c430c27e7274b3123640edac8949c6d09dcf8a311c39c1f778119640. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DKPK51100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274a7fb91d01a3342d615672f8b780b9f454ee7a6be13b9f356ea5d713b34584. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DKPK51300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69d6a6d0784cba45b6138ca4365ef126484ebdb57f8520decd95cf1d90d9e96. 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/DKPK51300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7449b843e4a642e95d2d05e950411da0860f51a87949eb7809d505e3450d1018. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DKPK51300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168b82351aca3f1ed448ea75c486da8c06c8dab67263a7306c58a86618ce7f08. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DKPK51300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31171a50d67e2ce1c951787335f3be50cacae322fff7941dcf178a6638a9c223. 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/GBVEV1500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34561b18acf3d7483219fb64492c6ac7af89b25b00be7fc9e4d8cbce4bb21704. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/DKADG2000965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0374b574ae3cf1efe5a690444d28f31921397c33b4a2b9978d63a8da61d5099. 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/DKR092100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9766032ff3897a340db7481a55478ad0e2f1741576182c006bca45931272af24. 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/DKR092200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a4b680663661748be388942872cd50f08e8da115dd0be1350d63550ae4107a. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/DKR092200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28c8d242b6908146d87b9260d25e78f948e9d7f40e1747978072e4b8e299409. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DKR092200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3728fe6a3754d0be5ea4c82fcfa30b748ca49e144ea1239e00253322582aa7f6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/DKR092200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569bf1cd8a1c9279ef260170ecb73dc03af14e43a5a0a2631370e2636a02f837. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DKR092200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114168f038365c73c9a403e5ba3b61ae879c6a9f168d2a8b9e858aeda3a2d8ed. 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/DKR092200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6f07e1b65ee04400f25cc6bdbc172fb2c830090dd34f7a4965e74a09c0c6c9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DKR092400101.