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 0xba39e14c5b1c1ec46c093ac5f1be5629926d75b1765f1277fa81015f1744dda2. 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/fcd9d85f-8e37-4607-a838-d2535449ea03.json and https://artists.proofprofile.net/proofs/artist/fcd9d85f-8e37-4607-a838-d2535449ea03.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 0x9d265582f8bfa170374d34b4913ef529bef384368eda9e3e92637d8af7d48449. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNW72372963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a274d90f20bd981b7ae736a2ecc1115eb1b7b30b6dd92fcd696f836fcfa01fa. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNW72372965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b6ec78788fa5232dfe135138aa022316892881d951fbf6ea27da4a29d57cef. 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/QZNW72372970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd852a0116b5646eccff2107f17d543708de3e288716c70809d0d7d07486b5b1f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNW72372971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c45bfe486185a38a4d764345bdd30b8f6a95f4c85ac0e0f034b70e8b157efe. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZNW72372975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f964a90d8027437fb2213190bb57e59fddeec05a581a72d8dbe6f12667f2e0a. 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/QZNW72372977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd4a043d9c24abf5dd01556c14c472d0367b9cb6a9d9022e407c938cfe7496d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNW72372978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e09063841bf39c0972bfb5c19f4d1589893db0763d8b65ec46fda0c2e1e35d1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNW72372981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315d3c7f833db6bad4e48a99739bcf0371a85191ba9bc89e0508a42ff31e5bdf. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNW72411296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf47acd77c5887318cf10d180a12502fa96806ac59f32da76091bfb9da283834. 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/USDY42149572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe73c515dd6e378d32440bcae7f65e4e6be666eb256884843d0dd96749b13ae1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USHM22107685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a0854619ee20ab898e44758cbda01629a894de968025c1f7257fbc098ce5eb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM22107687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8657a8c88c70786fe740fcc704c09b2dfcde4363df27c9c3c69ecef487b7a85b. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/USHM22107688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1303fbebf0a2cc6c4d7ca5cd8d53e8f7eff99199c2a421395e7a2c51140865d3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USDY42178302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de45a97322e70c1ddd1f1613385626b3e887cf2d7b85615a5155ea84c669753. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USCGH2214253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046da8976969c3a9d1f80f6a433f6033b7c5085402071580698ae540af1f261b. 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/USCGH2239845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6eccd82142daa4d1fd318cb56da183d129945b2dd2797a766700ff2447720e. 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/USCGJ2256994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3313a076d3267685e8b57f7a938b41458e5ba17cfcada2ee905a0fb64ee44066. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USDHM2206081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbf05513b204473fecc3c3ba35aeb3ec223e162df3b2672240a8eac66d04188. 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/QZNW72206580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd14a1c352c28b44fb3b280b068bf29a77d926b4f29f9719299f303a2dfe180. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNW72206581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb8bfd1117252fca13584934b789e41281a72155a045cc3df12a47c8d7e8f7c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZNW72206582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52755ed80db43c851e10999b0cfaaa79b528ebbf31e53073c67d3b49940d8fd. 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/QZNW72206584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c0442da318c5a7407b8cf83cb375f2fa09f79f680ac561d0a33f6bb16dc76e. 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/QZNW72206586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a2e60eb70df555049c3aa2ce21210ba4820cc201bdedf001d074cfc50167c6. 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/QZNW72206587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f626ea133a5f543cb99475d1541a8f4f7567d615ad65a024348e425afc59d9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNW72206588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3395d941e3f161771446396b36abf18579957365e0f22d8752e3cccf6a100f58. 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/QZNW72206591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe626644d7b1a4b4d3a10235061b319c9321c199f8485eee2f931e4cd07f8c540. 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/QZNW72206592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19f1559b3265b9b1a7e5386e0028b422f73d11869ff8d5e8a66d8d632cc88c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNW72206593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d840aee728a2550fbbe2ccd5706eb8cb53b09b2c4abb64c95914728f808e21e. 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/QZNW72206594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60f78f788ce0a94b1b3971a78721e5477788078c3e581191b5cc86095fbe802. 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/QZNW72206595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df76c5f028c6b98c9b2d252f19548c2df94976915fb7d19c7ac8ef37508f92b. 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/QZNW72206596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705f8984864b00f009ec0cc6cc996b32fc42eb5404b7a0317cc3e43d2e5b44f5. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTB82350849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd121e9cc68932cf012e73d8e42910bf480d6dba4cf3aa52918229ec3b0c57b90. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZES52559542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edc2a364a741a2c22aac1f663e7391646eb6bd1fd77707006bd53c94e657601. 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/QZES52414340.