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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1ae930e6ac33956a35a736b3649b890e53ca3e58cc6a7eca6758db480bd279. 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/11cf2d8f-c542-4990-9278-eebbd8c898a8.json and https://artists.proofprofile.net/proofs/artist/11cf2d8f-c542-4990-9278-eebbd8c898a8.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b1a193fce2edb3c1b30e518849feb316af12c5a09e60d21422ecffc379ae4d. 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/AUUR12300405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9188a0ecf0f17eb7e8fc36ab94125da70979fb67c7f4cb1e7788b69de05e842a. 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/AUUR12300403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ab313c67497f8791cf64611e40a0b5ecfb2ce50829e1a844a1a72ee4194a22. 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/AUUR12300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6df95d069789a7c261d104cd7669a9f965750be33e07b0c5cd3cdac54f2d38. 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/AUUR12200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0663f3eeae968b485761ebd93dce868c218063e8e78fd586846a9809210583. 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/AUUR12300407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976aa6ee507d9e31d23808bd191af075dac2760b7c7f701af0235b19a0ae6097. 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/AUUR12300408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a897ec4848e1e69b36f59f8f781a188816568d275920a1b6cde37d4a17b1e8. 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/AUUR12300409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44cf23b384e381d2592e9cdf27197fb478cad9b29370cdab3442f61c881cc89. 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/AUUR12300404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905fa6535d022507f23b5391ebf044ef596d045d1d78fe0526a4ecbbb8c50993. 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/AUUR12300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb6b8e4cfb2671c17c977b40f823a205b7346e58af57ecd4d27d943de611deb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUUR12200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e0969d7864ca83f65e1c674f913621896a0f84a752fff09540a47a908c6bff. 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/AUUR12200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf428864829425ec82d882e4cfef6163f44d1fea189ee9f97b4c7145633f1389. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T09:03:23Z), 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/AUUR12200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77f925ad35b3860cffa6bb11e8d92c112f81996740113089d200da3694eade6. 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/AUUR12100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8cab592ee9da0f0a0b54fd984cb3030e661e7b41396b980caa9a417556412d. 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/AUUR12200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e198949121cbe295c82e64f9afdb1d381b7da4454f4ad8d33c124522e534aa7. 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/AUUR12100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44cf23b384e381d2592e9cdf27197fb478cad9b29370cdab3442f61c881cc89. 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/AUUR12300404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bf026e41283352d5b5381edfa085580d79bd2107749b5d829eea443a39d68f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUAB02301199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb6b8e4cfb2671c17c977b40f823a205b7346e58af57ecd4d27d943de611deb. 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/AUUR12200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f5ebd1a6ebaf05ce4039058509244420be14e346696da8df9219dbaa5c9f45. 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/AUUR12100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e198949121cbe295c82e64f9afdb1d381b7da4454f4ad8d33c124522e534aa7. 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/AUUR12100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77f925ad35b3860cffa6bb11e8d92c112f81996740113089d200da3694eade6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AUUR12100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86192c64322a39a8542c0ddcdacf6f516ad1e94b03a1abac12273dae6ef6292d. 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/AUUR12000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1d99a0e7887b59d8db8b4944620fcde79c381d8010a74a6a1bc83cdc330952. 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/AUUR12000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26db41ad529e1b5083b55577af4ced9432d55c4e88b7d5aeb5d05efb5591aa2e. 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/AUUR11900501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f707a0b782ff54eaed610e96de73cbcfb3bf9ad09d0d6954fe8818c73b5e0f1. 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/AUUR11800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddbc98cce29179bd7f058fa13bf7db98f5637953c56e64ae040ff21ec884cc9. 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/AUUR11800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036602098a8429175dc601d08c5bde2b3b78fafdb21ae512a500fa15e79180f0. 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/AUUR11800001.