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 0x1bb96dfeac7eed62f8f58fbdf9523214435f7ecf6f374bfe313695d504f6ac4b. 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/5e693969-5e2f-4a9f-9e70-5cd7af21d97b.json and https://artists.proofprofile.net/proofs/artist/5e693969-5e2f-4a9f-9e70-5cd7af21d97b.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 0xdd69390ccefaeba24a7346a3da556a7ad847e0815a6f5337f92f737dfb00bdc2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/US7VG2118314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20301a57ca7306bf0abae1af3fcd537d37998765563dc32ba6e2d22d9940bbd8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US7VG2118315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2dcda423e049aeeb9a117fe73c17b289f9eb69999d3d8c0b03abb1461ade6c. 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/US7VG2118316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0073ff65a7ff3f7b320f62306d48f1d453b9c6d1729f13deaff6b4584fb1726. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/US7VG2118317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf282670c76885e626aad661ff89a4e82b8dc36616a78d78b0631eda36a674e12. 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/US7VG2118318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0f88800679ab8f3b2e46b40e840e7f3e0d27f0fdab0e0bd2af088d98c92d1e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US7VG2118319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3b4a4f73062910892998c9328193bbc2cbef17d91d7b6403ae69bd896b45ef. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/US7VG2118320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f3bcbfe4be6c853c3025d4872778976591671917ac26eb508ed95783e23ec4. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/US7VG2118322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191b37ef9f980e834e57dfc4cd7f34936b885a7ba2206bb957a8950080130afa. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/US7VG2118323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535c837c545e7a162f6911e181bea1b90dc489249bfc237edbce1bf91f238186. 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/QZYFZ2500261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bc7d8624c93178f7cdfacf3c7eefa70e24c69de4ba245bef9f642684c11bd3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZYFZ2500262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8ea79f092473522d01c95ccb43c4ab62201f4c781dcdf96ffa763ff60ae595. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZYFZ2500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ecec14ab23c7dfb6633c6553df957a8f49fda9c7c3b630c282a52379fa042e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZYFZ2500264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30861d29cb8f0fa382354726ecc982aa6f336ca8cd0825bafeefe32a27bc984b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZYFZ2500265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206383f77934233c96a02dc1af58097c9d30a96b1f797f397c19418a7f27e664. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZYFZ2500266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9957a6c70362c3cf30b239403c7dff237df57c05d787a27fadc1e61c0417085. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZF8D2501418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabda2165701ceea7357805bf6b8ce5b18a24720516d70357a5ce9d3b54fb0b97. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZF8D2501419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd2f6088cb22dea35a545b71b8b331bad032222a8522911792357b7762e393a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZF8D2501420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4b22cc4adf7e64f4bd1341e12dd6e4b335c3a95a825fde9d11e61ffc96037a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZF8D2501421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a57e382ee811c0321bec284e66f9a9c0ccc3eb04e3826601998c665479f5485. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZF8D2501422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f43a61ac01d4fb4a1e71610cc86ff1865b17211a03a4fd9f5480271a04e5a2e. 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/QZF8D2501424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a07f63d1648fc7db05bd4a4ba7cafefdf241d33fa49c9dac42c387d6fb9866. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/US7VG2129680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a162e0f811c7f17fe9d3a1c37e0473b6724f42b65276cfbca71b4b03812e91. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US7VG2139320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43de8e434bf7e475d6926e7ff6f4437f7dce9d67ea92e416ea32a4fddb647b99. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/US7VG2139322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8f47187744fb551b7611707a057152cad72b6862ed27aeb9f9c5d48b02b0df. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US7VG2139324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535acaae82f30027e953e4f8e9d92d45beda82d63f5d1b51eaec269b22ed0637. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/US7VG2139326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82dba660a5a6d5ce4d2c61f6deaca2ad1e1d50b9788f76147a3f3cec59651a3. 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/US7VG2218554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052bc1721ef06a4eb09734777d55a4b3fc6560fcd8276dec13b966983f506a9e. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/US7VG2218555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda207a0c1ef0a2c29d1d5f3113792a113af0e21376f938df3f7472efd00e29e4. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/US7VG2218557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f588d88e4e98588d9e3f93fad3af3ac252eac396025a7b22a2d1663f2aa344. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/US7VG2218558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd756ef57fe4e1d49ecc0e64745461454edab41d03d9e73ba0c621af545078fb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US7VG2218559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc109fbead6a048299f23f2010ff07e8c441c10a2fd2e9f6487d85ac84dece8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US7VG2128839.