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 0x4490651c61c89f6f1b342b28b6c00861f3a03fb47c9d41c24da0ae5e9d372e99. 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/09f4450b-e4d2-4dcd-aeb8-50133697ceb7.json and https://artists.proofprofile.net/proofs/artist/09f4450b-e4d2-4dcd-aeb8-50133697ceb7.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 0x7663b5b41c0650ca86e417eeeb04182d141e56b314914896ba609726585204ca. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:56:03Z), 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/ES64E2205167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87c91fc655990e2480ff55d5cde35b33e8af1db5c9b3dc598a7fec4f29d7d83. 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/QZNJZ2383911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450c911e2ab82b4e2e722dd0e0b9e6255ef6fdefb18574ebcb633dc20c37764a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:58:01Z), 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/QMBZ92093529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdf539ec993f252a68229d86b2cd669c6049eb58a2582611db8f2e0097ddaad. 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/QMBZ92093509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20a050f52b2774c4e797b011c5082e5afff8f9aced06e34a82deecb0cc2b55f. 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/QM4TW2249578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99fff995405dfae28a8a28c7e783b202355803a0aa233c51f5ee85a82423be1. 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/ES64E2302794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f67834fa47bcca89dea58564745587b247465cf55abaa64475bc3ffd1ba4076. 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/USA2P2319391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f9dcc67ee86b48a72e42cbaf3c830624f1e5f5cdf9cdfe27345ed4e4aa52c0. 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/GBLPF6709563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3f6513c58acbaebbf178439409f3846d33cc285249939a8ad3680445eb462d. 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/GX3Q92092592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cca6905283be4e5264621c3c19bd439c679bf15b79ecccb6f5efa46e7096d6. 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/QM6P42143747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40cd965d4e6e171d92c46281287cc6ef8440cd1364ccbacbb8e918471d02682. 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/QM6MZ2111450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8380399e1f66fef2522afdb6cd8214decb21587c8f7a1271e346c7a9aa2df908. 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/QM6N22003616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa83b9de0e29488e19ff4709297dd1fe28c16062d09c6b8dd494072597ee11e9. 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/QM4TW2040242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5e0b670c3a7bab6514ae3250b93a9e8e1660a33182ac3f108928169f6ef08c. 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/QM4TW2026418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7b28d6278d38e0d83de6b8a4c04f568b1928fba684c61efbb97096b936640f. 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/ES71G1950341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e95d51068e8bc7a9d9873a5fbda449c002646ec1a4a2a8c6de26762fa62d56. 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/QMBZ91911145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0491aa7f7221ef843209ee89a45a5b5816d8d78c11e837d34460d95e92498b9. 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/ES64E2507377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712581c2b666c214f1f4a747c140ef29640a9da59c9a1d9bfecb7bf69c917ac8. 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/ES64E2499868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7735cf2709c27d8ee14a885509649090075bf2cfc103a32eb70f616aa0f076ec. 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/USLZJ2278662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42605be587043ffe8cbcce12c72fb288c9eb68980baf2043e1354125611b97a9. 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/QM6P42195531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d51e9892c32d6db69d0b5494143e02d1c7e2dad15fc2b073b930352a3f279c4. 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/QMFME2000688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd873e1013fa62ae6957aa3d68f111c6d7047e87a0391913b81413cfba2f311e4. 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/QM4TW2077570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de2da264efa402496612fcfbe1e4d2e3ad676f89e53ec9d0ad973e1e37d3601. 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/QZW9L2301443.