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 0x6ea4db02c0707adb4d721ba4812129e0d0141d79a01bec5aba1d1a0015de3c9f. 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/2afd56c9-4b9b-4640-bec2-b72628712154.json and https://artists.proofprofile.net/proofs/artist/2afd56c9-4b9b-4640-bec2-b72628712154.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 0x8e2a9e10193d5bae548a0aaa103ce16b0f9d230a21484c6cf27860b04e3cc1ef. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NLCK42416012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783ee2bbb02fe4acfba5c839d0bfe6da663b49f27f06da627fa34f16c65e788f. 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/CA5KR2496796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b41006e9b0c018ca1b8dffba1c99db85752d2a9f12658f5a310cd3d55b5c51. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR2496798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea175daea6f6a9291460034d1dc9851e286a20a8118346910fe8df267235245c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2519343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e0c33594d5536f1884646d5ce1c1fdebcb00c506a627b64c7ecd131c937dd0. 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/CA5KR2519344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf6f535545571961f954683a35b19073ed0c7c50ae5cb96d659786b76b5de53. 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/CA5KR2519345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347f94f3d31ff96693ef0a468ab0044282f8f776d2e5e1374a019ba171ecc00c. 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/CA5KR2519346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a6cac582f8c419fd533685a389c024fabe493b314e487ac4d0bf66d6590e54. 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/CA5KR2519347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f0cc7b2cfa9c29c9a81f29d15a745b0e43143d57e56fb59195a520461b4853. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/GBKQU2536496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc709806df6b67d37fb3a5b312b04895c436962bf305d5af5444d3adcfdbe289. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZRP42507696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181f1f8a248f972412e24ab145e7eda0bafcd9e99942abf3682898619a650655. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:20:13Z), 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/NLF712504826.