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 0xaa3bf79b95e4bfd65219dc957d38f00c3eeb58a32d8d724ae4ca8ebe08999b34. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5748199-83eb-4c68-bbc0-fc64e0a0e1fe.json and https://artists.proofprofile.net/proofs/artist/a5748199-83eb-4c68-bbc0-fc64e0a0e1fe.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 0xe53aad38add842ea9df5a8cb84c82a77503e19349a7bf55d61942d3f60f8365d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:17:49Z), 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/BXDW91900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84116854014eb096815503c896b79a044bf42e3aa217572fafa41477fbfdb12a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BXDW91900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf890d2c03c092d067cb53a90666f9af954a21e92db69ac4eae0d157a2f4d32c9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BXDW91900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ee1c7aeee32afb748df575e210a3190c6095cd5109a83d0fa80c946342a29a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BDXW92100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1f8a3a9d0d2f69b9cb9cc0b59669f317d903d3af636014338c48bda5541f8d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BXDW92100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b007c5a354834c7f769549372b9eb6e16e179fccb9cbe8056f3f6de249dc8f. 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/BXWD92100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2f10371e9395b4b9f5e75475c4e156bd23b9310252e4fa3352b974f17bd2fc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BXWD92100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de99654c3772c0a41c9669b438377190edac58995b78430a9564a663ea4eb6f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BXDW92100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2156e8316e4a147572fbb2443a4b23770283170fbe732b199fc89a20b504183b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/BXDW92400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03f0dc2aa5a99c7fd04090cf1692fe060151524ab1c753d0e1c8f83c9d4ced5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXDW92400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafa92f67e4e1fde23a70d4a6b3567f759cdaafbc2c8be07703ea0e5d5a8a566. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BXDW92400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f87f01166a3969e614eccaa1367065a2e7ba39e474049724a7f9f6ebbdf8c68. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BCNXS2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1e0bbbb0aadeeddb3cc936b2f5ee11ad75992cfefdfabe0fa0f8b5ede2b2ed. 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/BX7MG2400397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca61809be14136063083e05173496bb53a705f3196c53dd51d59a074d41a43dc. 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/BCMA72000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f89b0a32c41b754364017f77a0d31e67e859ca9237086d74aee37ae82ada2d6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZGLS2276733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1e0bbbb0aadeeddb3cc936b2f5ee11ad75992cfefdfabe0fa0f8b5ede2b2ed. 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/BX7MG2400397.