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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 0x914681e8ae1a67d717eb22dbf60510982059fa087e56dec9a4c34ec1a4459d02. 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/f9a063c0-bbb9-425f-b3df-ad663646b4d3.json and https://artists.proofprofile.net/proofs/artist/f9a063c0-bbb9-425f-b3df-ad663646b4d3.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 0x582796b59900f40cb5885e85d2868e574cde9e93552ce0e3da9cc654cbe4ae04. 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/PL71H2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f42d87e491e2531b4b628efc8bbe197e31dc21a14d77ea2c8444bf20645bd23. 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/PL71H2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64c3dbe3bfaac707dd8247d6f978c69f122b473f62fda41e89a35e1c78481ef. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/PL71H2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b203d275f0a77046adc3ceaef45eacc66a11b49b31fdbf0c18cb60b2d617413. 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/PL71H2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c5439fee55eb626d458900e45d5f7257458691cf4ef27fa2156940bc89978d. 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/PL71H2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7464980e86740b2d93480afbb7140287750c59a20a089d6643599fd9d658317. 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/PL71H2000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82c19769ecc5714bb6afb0c30f5c7f8fdc191ffd61874e1657a5c9fcdd6a03e. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/PL71H2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd350b63263bd118c784c059cb9c8045c6f48cbfec31bc0c98fbb0a3d0b8626. 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/PL71H2000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec79c0f59bb6c2b15b3fd1834ff16e14b6199827a9023e57c73bd2d9c039d46b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PL71H2000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5f9e9a976cc365c48dfae3222332c05d8a0370f688414b4ec71b09e2c432b1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/PL71H2000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc56d918ec80353fe51a6fbab9bf6707871dfa95330c0df564e71ce11cee0668. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/PL71H2000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38358a5b035f191f82946fec8fe701d2f8d08b5b60676136fd96e93fe4c1a18. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/PL71H2000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb2deec85ee319fd38f17c91706f142cb13419f889ce5dd6f6fab6853e43825. 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/PL71H2000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3504895058347c076a49545ad5d9f24e8038c96dd33f9e6a5080bc8eae569582. 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/PL71H2000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa394087c1d00edde2aad25d958e977e7c1980f6c4adf029ca437f9c2ee9a5697. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/PL71H2000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87306618e0fbd820cc01ad11bf2afb09ca4ea0699fbecc7d279922c495ab9531. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/PL71H2000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef9fe6f7a04ccdbfbe9c0d63882ea86c2ef0b2dcc46168812f960e177bf5634. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/PL71H2000153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c998850af7e412df009f3fa6bf5e18f2b58144b1d6c6b4a8e05bc1a0c191aa. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PL71H2000154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf83b73a584beebcc37bda7397d3938bf62d0c9d4977d509cbe7e803e9935ef6. 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/PL71H2000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2f954deba98cb8a0569eca5a5bb65305c1b1c1b465c7bdb4dea60bc88b4b9a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/PL71H2000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f5fec8cc6470cf8cee500f70d24d68be340aaddfcdacd1cd0d6a928efa1517. 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/PL71H2000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3540734a910029d71f249360dd5c91610d91e5a3e44e7af405dba52810a68cb. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/PL71H2000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca28c56c0d152dea9f027ef65d9e188ce79e079cdafaa4432734dfaa7bd1a12. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/PL46Z2300002.