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 0xfb0cfacce9ec9773119ba8c1a742e842c1eb18fc61939067152b52b9ee036e6c. 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/a39bc86a-1dd6-49c4-98e1-8d6484e8d9f2.json and https://artists.proofprofile.net/proofs/artist/a39bc86a-1dd6-49c4-98e1-8d6484e8d9f2.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 0x72e41a1e4db679d85410da856c87bb806ce91c803453a5b8f9434576e9c5ea21. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/PLF241705771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d95d67afdad4af7c195b842dc70c1677e9369ea55541b6dec9cfaea82a05e84. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/PLF241705795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b513113829a3f84501c0e32b791ae0b79dc11ecc9f642a93d7b6082a4d864d4. 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/PLF241705799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694812af75b029a004d23ec657d2221c9f571f9ccd9eb7acd96fd2f8f88799a6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLF241705801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8d0430de1fe4ce977c2a504664a84b81e78522dddee56f603b0e5424be8c29. 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/PLF241705802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397632dd1b94797fee1f458badd0fb70b865be15e606746a7cdd2b9d175576e5. 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/PLF242007244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf142a345ed4ad9be84b3a64239abfdf381c71cddb641194cda6b957e1c50e98c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/PL7C52400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4bc48181942a52362a0906a06ab670118917e6bb03f58cc7091750d0979210. 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/PLH341300515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b033fa8f38a5124add609e4b08d4d4ada95bf6f2d894e17580b00c3d34a47d. 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/PLC061908047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b033fa8f38a5124add609e4b08d4d4ada95bf6f2d894e17580b00c3d34a47d. 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/PLC061908047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacca8cae27c5419c681d58dcb180fc41d6512a186a629de877edad4b4c2533a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLF242210083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ec8e88dd183fe042aa971bac76fed0d4775c0083dd9982caa1e26d6db99deb. 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/PLF241905941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397632dd1b94797fee1f458badd0fb70b865be15e606746a7cdd2b9d175576e5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLF242007244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2f4ace58ce48b6110e5ab3b2943a680a1e184da51b0d205178fa48088170b3. 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/SE6A92198315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9ad18f7f1c39eba3c4a7a736ee0c3f1072617c6f67f6d0ed1d364e2f1ba3d9. 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/PL44J2007440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c994b7d32a8881bb15b5b19403d6e5fec35acf2a58f8b47e5686127ff95acac. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6SA2156676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996534e43cb6d08ef7fcd0189a0c20dcd09cbcf887e02e79ddeeb3e58acda66b. 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/PLF242006845.