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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde76ae51b06e31945f16ccd3e49de2425c2dfb57191026e0f70eb67530e0b63c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e348bcb-5886-4795-8a29-643d92ccaa2b.json and https://artists.proofprofile.net/proofs/artist/8e348bcb-5886-4795-8a29-643d92ccaa2b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20663c20f2fa801dc4908357820b3763b833c114778615e4b739f341ad78173. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNUM72400536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091ea8ce0b61755ef7059eb2b98836f5ef1563c9ff252efb4a77ff95ab6220b9. 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/CNUM72400647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6987560458ff198a6715403bf79011fdffa92c9d90ebf060ac9f0ba7aa678f0. 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/CNUM72400609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a753438f8983b6c8dcd2fd6ecca4201924d2ad547e997d7f0eaf493b72f9e64. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CNUM72401038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f86b2cccd9002b9d1800196cfc8e5382e75ef5c3cc742cb13e989628e1dae88. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNUM72401044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c405447fbb039a56b81096da5c814ff1a88d63219249e3aace6e2456842ccc9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNUM72400671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd952467f074d84ca53ee110ba6af13221e2ff87af4383fc6e0d831a710e5e8b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNUM72400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cc26ef961006b138f162a095485ce23bda80a7740f6197dbbd90c70952dafc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNUM72400518.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe967ac81955ff40d06b8f07857a3e14a02f372b0fd59386f9644d2322b956216. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CNUM72500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe36823d1fe99e464c5cbd210477b37eff0dccd839c033abb0d30b2b97e5a5c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CNUM72400559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a038c2206d3bccc003d05350f58b80782b28948680343d9b0c2a0d48b39828. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNUM72400589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e96bc780300b5b4698d31537b5b48a356134aff7ae22a72bdbf67e9d2765f0. 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/CNUM72400741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd60ff7b83408aa678dadc439553e9c013f5f543eb3221f10c702fff0dbb4219. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNUM72400747.