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 0x21826507145e3fe21fc5fd6ad915ad2f5ecbac0e75df9d7b7835a3474859b6b5. 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/31efe66e-3c23-4b25-b299-77fd6ce59167.json and https://artists.proofprofile.net/proofs/artist/31efe66e-3c23-4b25-b299-77fd6ce59167.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 0x4cc43e4ef367e689a3de2e7a375388c7d75973e9aad626139329f39a6199e2ba. 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/NLE801800537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e8714c42438758119db194538d9badd46bf4df9ce580c159c58f48a427e547. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:20Z), 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/NLS3R1800280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc480217aa45d7f5a20894617d2b34ca75638732d17c1bf3e6d10d08a011b07. 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/QZFZ52013763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7a9d60b54d1cf85a913f96774349c440ea927ef678f09de228b913b9f243b7. 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/QZFYZ2028482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7a9d60b54d1cf85a913f96774349c440ea927ef678f09de228b913b9f243b7. 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/QZFYZ2028482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d75b5443f2266f8efbde56d87e0bb4425606a18c90e3820eaea9f0a50a8942. 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/GBKPL1961757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc732e5647f9fb1f487636d28de0d90ffdc01bae6fff2f1926dfab66dbf7ce587. 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/FR9W12102152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab7d4482825431a32235c588152e8e06e0477f28d0bf8a1c32481f22d558717. 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/FR9W12018992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cc70a3638b2a721114d1a12e16fae01b6189b3e1231946000ef2c3da4a1b53. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BE4HK1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd438227455a383231277715fefdf86941e0af3b65bbf09a1e23d183b1bd8eba. 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/BE4HK1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb695a5c3a96ea0cc0b4ca6851128a27adc5ee95c023854b5b4f6f97cbb35a252. 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/NOEPO1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5e3fea8f6460fd0e58df60c8f5c4f18753fb9ecfde37b39542f7c4a16f1343. 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/NLD682101753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf855767d7da9bcd4435168b7d5f016020c0194aca1ed5ec8647b412d4aa3902d. 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/GBSMU5788828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba875641739c93d48497d034da03534af2d92adf56a1169a8140aa96eb833591. 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/QM6P42226085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5841587a8fdc295aecb7757c04d541df3029f4640abc24c525cdc55dfd32b51. 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/NLT2H2100450.