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 0xd0777007a83c5b82f4db7e33b4429a6c491ea13a25f131c0ff6964e4ce741230. 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/b8018559-98c0-4967-8694-0f74da439f57.json and https://artists.proofprofile.net/proofs/artist/b8018559-98c0-4967-8694-0f74da439f57.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 0x1520b5261dcf8d41fca5dedd8ac2373bb7a604899e55742b917e312601f53291. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:58:57Z), 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/AR62G1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687d90f7784f049fbf3294a4e2414a45d4659ef6f7dbd1c62632d4ea8c8b91fd. 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/AR62G1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd591729688a19ed2160a75296c77a22751310b95f57f6913f33cb70d0bb6f0c7. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/AR62G1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20459320d908821dac9b7011714bd3c18ecbbebf0fb8edeee03096f594fcb8c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCADP1846363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3611aea3cf104f41cfc553719a5ac373a5047cab974a453d6f658b81bd2ae883. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCADP1846365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81beb26ad8e81acb973b0d4e880a12165d5ca0287562ef76375fa8d52f5ffb79. 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/US7VG1843952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76137a0d77193bd83d827d58c8044d22af47f6edcf3f26c04aa82a87b3c4424. 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/TCAEH1957741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f182ff2e7ac5b9a95cd2f3ea9159129f51a7b440c6d18bbbcebcd7963d7944c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/DGA0L2392923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb572f78302be1bd486acf5ab5e139f17c2f6aeec0a9cd9f816a41f731cdbd19. 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/AR62G2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98da20035c855237fef523203b585a1ac6c4798a114e2324fd07b6f7b0f1d26. 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/ARF841800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98da20035c855237fef523203b585a1ac6c4798a114e2324fd07b6f7b0f1d26. 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/ARF841800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce91fbfa63ac0be158a654fffd0420325ea5e2b4d16ed76eed7246c5df7f0cb. 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/TCADZ1871707.