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 0x7a164887286debad9ae0e1dfd671bace550f50f91787ffa91261ae65b3f7e785. 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/7f0e2802-71b4-4ecd-a65b-e641e5ff21fa.json and https://artists.proofprofile.net/proofs/artist/7f0e2802-71b4-4ecd-a65b-e641e5ff21fa.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 0xf433a177247713b009c24e3631aa21ec7b0effe95274a55b7537f9679d6142f8. 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/NLRD52222498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b0338b7be87e99aaa1540fdb281fab65d6453b38eb8cb68d24118205921510. 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/NLG272306812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b79e7c71782eb7a520a83d47e3b6b5f4f3dc22965048f8d4ae58d3fa1e85a0. 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/NLAM42400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf0c3604a68895001aec6ad825727defefae89b9a4b5a1bb584541120c08111. 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/QM6N22429565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f233f2f2e533a075e630abc92562aed644b8d454c56fb03b292b4b0a32ecd6. 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/TCAHU2405962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfca6e1cff51f7a7e4131f08da7a073a702fe48f9fada9910c6a1ae4384c631. 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/NLRD52222192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a54628e861fb090cb1c55adfb93110df4f4f501b411813e223c9523ba543fa. 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/NL5XG2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2e42ff4110ba4e962c46467165ba2ce96928bd74555a5548af4854dfcdb18d. 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/NLAM42200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec3b08d94fc5a46e3b55e63b2fef089fd75a602de7e2dba2119d1f87a771e45. 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/NL4RH2021006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7acb99e2b83eff4fcda0fd47b80e9fd9037b7d689e6fe32bbafc23c1867f7e. 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/SE6SA2108014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec320e62b2ea3c00c0a52d893939ecf620c15a59ce51d245fdefc144872a4a01. 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/QZHN92115256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d583bf83e43839010f77472a838c28c83ddef42d61522d1129bde0c71e41fa. 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/QM42K2005413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c7f0bd272bf51f7fc827411281931a9a8f8a88b15a3c02a0640b7bd6364e57. 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/NL4RH2021008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec320e62b2ea3c00c0a52d893939ecf620c15a59ce51d245fdefc144872a4a01. 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/QZHN92115256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a74680c4229ba0286f2aba45d1f18e3b919e80b4a824d6c090b21ee5497cbf7. 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/NL4RH2021003.