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 0x64257ccda0c4c1b13a3e81e83083e20abc3c33ac198ff4d88a93ccfc2961db1b. 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/057fd1a2-fab3-426d-9d41-f73f1037797e.json and https://artists.proofprofile.net/proofs/artist/057fd1a2-fab3-426d-9d41-f73f1037797e.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 0xcabb7bc578140796b54c84d55b9e918ba1e8f8ad6d14495eec4ca7c600578ba8. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/UST8K1856768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc6bbefa45bcfd77a4c3b482b9440620ae666fc648122f14b8f32474700bfcf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USLZJ1919815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7239e4c3be24aee5f5747e6b063839ec024f465db768bdae64535d841dbe70f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZ5FN1940047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a424d4d430802407eb66737f94a1d26d6df4087df79184177bc37cb2d28cbb1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ5FN1940037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238bdd633748edc1030183dd830b646a64b8f9eba6aef955c0d7219ce21cc967. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBWUL2071016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9658f4a66832c5367aa910dba27a4934e5f3b1a9150b970a56ef5fed20caec7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBWUL2071019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66677a451f6787060e3a1bacf3ab05d0f053cb7b699964df1433d6b1da014c56. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBWUL2071020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551781e6eb7bff934995c1b54886584486318bea46410597f99c04d9ac6a86ae. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/GBWUL2071021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dcf2b64ac7c3c1faa2ceac6781d8cc69fda8293d4653d6c9e2a8390c7a24ca. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GBWUL2071318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fa578cf12fa8e4c32282c6e35df3feab5bc40afc65e6cb2b730b1ccc8cc44a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBWUL2071022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9674f7e8eb91c7d6b115507b2eb16655a608f4cc442c1f54252bcf869cb968b5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBWUL2071023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fcd2264f9a88cf0ddd25ee6b1d1185851b87ea85634fc1128ace97059d5540. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/GBWUL2071317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cb8673273b93a0d7b12d5aedf1421f1f96134fd711efe76dc1813a78af1942. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBWUL2071027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266305092cc4f75a954617411c76309d1568341d7771c601e3a627938a72a536. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QM6P42223145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d6bbd0bc8364d4607b0e7dfbd01adadfcf548f7590a9837b7f4aa0374be114. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QMDA62314272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8487f32f595b45fbaa4df49ff4b7c2069e1d40cdfc6de34e1a629ee3e95b3d4d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QMDA62314267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab1df4ca6fea159a2bb3840d288926484caa20a8ef1f8b4990d7ba91bfa521e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA62314271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d6bbd0bc8364d4607b0e7dfbd01adadfcf548f7590a9837b7f4aa0374be114. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMDA62314272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6196360d3f1789fdbd40b5216534f22a553459dc24f62a1d6aeb00fbb9ae083c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMDA62314270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab1df4ca6fea159a2bb3840d288926484caa20a8ef1f8b4990d7ba91bfa521e. 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/QMDA62314271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f4b967f13d5ffca90c61bbc7fddd48bab760228dc29b781651230c5a9d6af8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QMDA62314268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da4b54f63185be6f357129881d05011c724825856a6cbe4bcfc1fbbeef60068. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QM6P42223152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266305092cc4f75a954617411c76309d1568341d7771c601e3a627938a72a536. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QM6P42223145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d6bbd0bc8364d4607b0e7dfbd01adadfcf548f7590a9837b7f4aa0374be114. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QMDA62314272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8487f32f595b45fbaa4df49ff4b7c2069e1d40cdfc6de34e1a629ee3e95b3d4d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMDA62314267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf173447b8564311d53b9d3429d8905398637694c18c1805c5e38f22ea0ed9b70. 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/QM6P42223158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf17616f6d634ea46008b114b3effc1263237ca65075b09739789fa5653eece6. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZZ762446167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb9184add609a7f73fe78a74fc44a1c7cd706a9add8d268c2acfc160eef7533. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAS2559257.