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 0x02c5f338ca2f8a575ca8b00709a06b34835f627b169c06ea56ec655086c57658. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7de178fa-e7c2-4174-97e2-43ada54d5f23.json and https://artists.proofprofile.net/proofs/artist/7de178fa-e7c2-4174-97e2-43ada54d5f23.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 0xd69674130e77342e07e40bbcd4bbc717323076d7870c026797d051bf2cb31d03. 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/QZTB72246623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf85e59f50c4fececd2f731061416a953a3e3b3c9efa6dd831ef1d07e0f4e47d. 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/QZTB72246624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18765f3b33cdb0eb857d0abcd1ada117ed45c328e1fd945b20b266adb53a9a72. 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/QZTB72246625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa8ac79e1786ae95f2d5b51a7ffa7be3bd80cd95178e974f74f7f165eef4daf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB72246626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbe044ccfb282e28958949741f6813b2c66ea8c6902ade258b0d0504142ed6c. 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/QZNWS2284933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890a9f1b53cdf419425e716c9e71785acb0c27f26698d7f9e4c053fa4bd0a904. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:41:42Z), 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/QZTB72246622.
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 0x4e72c9af6429da4a0f712691043b41c978f6b7bb73c3caa0fa80a89510a1fcaa. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZTB72246621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377beb8c868dfbb224df5ea4db87032537a5a51f11db7974fb17f68af9db37c8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FRX282261479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573a0cc2034cd34adfa65613e51b8a0f7d9303c2806faa2eceb924a7c4245b53. 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/QZES92418784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8e28b704766abb4cbc0ce2f5e3f4fdfc6ee22eae5adbd9bce9487dcc4fd73a. 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/QZES92418786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c9533a3f228d2f5b84a731ebf81259f0df279a500b2133c0aaa01b146513bb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZES92418787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa319b32fb0c850e2551a77189487b1e8c38170da02120dde07e3a7881d117a51. 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/QZES92418791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d66870ce49641da2582986f98d370baecf749d4f2a6536ae0598579e583574. 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/QZES92418793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa784243732efd9bb8f57378a08d3f88763f28d687540e2975759a2ffd7291d02. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZES92418783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a050cab23bbcfc9fe13a3e87af5fc7e2b030b6e67889565e8ddffa43ab7f2f. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZES92418785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1311f1808ec9f5de9632b835ff7123e8eb12bcae2e6e24ee3c9c453c531bf929. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZES92418788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91653693629d061d50ee8152da1b377e6713d22002679f7d241ef12a370a606. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZES92418790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1979aa992e4399781883a2d12c1af209ce3b5159161d58320ed8c3d7bf0df8ba. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZES92418792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a3c1640a2afc0fb90839b15968a8c4444f439039d7a8de8e290ca51ec0e6f6. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/QZES92418794.