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 0x85d6c8c2bcceea7e46a7dac5f20254cdc35241e871fa85f53a7797b81840f499. 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/c3d30d96-b4e8-47a0-b9c9-d51b8663bebc.json and https://artists.proofprofile.net/proofs/artist/c3d30d96-b4e8-47a0-b9c9-d51b8663bebc.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 0xfe1a712323286ff79bd772ec86d0ad38f56a5cae81c67e9c6d42c5fed775d394. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CACWV1758373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b6c62661796ca8318708551c72e52b132a67a6d641775f8b8328ee411ea744. 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/CAENV1704713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7146261ff7a3431458e156eecf933aebd480949a63bb9809cf63b14763895d0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CAENV1755950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2197c13626b86fba6a9c54df74922cec93db788431d28f6c17ea48ba0edbdb. 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/CAENV1854307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4605da2824aff4e6d5a36f6e9fd177a22346c962178c34264a4f0f325211239a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:23:42Z), 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/CAGOO1802443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7c1e1582c65f7ca3c33ce1adab3ed453e0db6b55884d2180d5a90fcffdf3c9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CAGOO1857116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4f04ceff71737b08d0092bec3d6a3a7af5bda6f788ff160ffd5055f257299c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/CAHQJ1854985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddac7d2e309801cf5b479bf2e8863d338e3dbc56fab7d4b741b3726179593b1. 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/SE5751874422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8364f4ca4a6a585e7a15a76610b1bef955aefccccd7b146865a8db0349b84d2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CACWV1886728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe29808cdcb536b92a82de70998a2aaa76e94516ed8503f88fb0cfd1b6ee43f3. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/CAENV1948551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e31801e0d5800ff69c50424d8eeee8e4312d94ee1651895caac81ca621ad42d. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/CAGOO1985470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0205b31a0ef9b8025fcc195a8ebe4316cdcbd09899fdafb478ff2bdc40438799. 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/CALVP1941155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b4b91a1db75aba1bc42ced0298fc35a8aaf5c8f437e5eab195a1fe2b50f999. 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/CALVP2016036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3441c86e28141b5bd767e818b7c86bea7176f3aae92073dd546270598efa0a50. 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/CAENV2075623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16c8a7b5daf3a832172adeec5165aff9edc4731238cd48f2d3047e9baca7b75. 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/QZES92182960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7fe12c7d8e2fc01b63aaf9ff38428fdc823d6049b5d18f1560275380088377. 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/CAENV2149876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8afeaf50a2f4dede44cf404d674eb94f375936cf4512273fca6dc3b9002e44. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CACWV2261547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e1426c3c6dc1501e2f60ae9c5dfbb540b4c976d8fca7244a865ce7daebe97c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CACWV2299236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef71a5fdc95c44a5ecedbe488994674210fb7d4309fc6c9a0d56948e0458990. 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/CAHQJ2232474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145b98b408b8da217cfdb5de476457f53551178a0065d57ba65d89ce2c17f14f. 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/QZNWS2253182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3445c0a9f3b5a561d30d73a2a4f5484ccec3b1d3aa40fe22ad70b4254299e7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:46:43Z), 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/CAHQJ2309749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66618ef839a10ff8c85da6f0b2d168e95538f7af4359e27b8657b56beee82547. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CAHQJ2338605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197808a4ae5dc1b9bceec11f540b9c6aef7389150d4818974e507868a2c89591. 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/QZDA82352409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3307e90a12a6c72d12d51e2abe9a54d16094e2e374732cc2ad701f84fbf392d8. 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/QZES92329699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5d5ea35291c4d38285d75d32dcf7d561eb17c98d658dd727ebcc2e9a907ea5. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/CACWV2375840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ba834f4af0722523811aa0033bd588b7ff56dd0a31f05b6c094310c02a831b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CAENV2396516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b966608a635a8029df119262efde1fe582fe1a27c01e4e7617bb4bfe42151b. 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/NLT2H2301243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92136910d899ab45442d8199f2279baad3858e63dcedf36238b8f7983618e59. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DKK1C2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67029ea2806ddff97460edf65b631714774aef1f289c70d99017ca6b2d989d02. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/CBF8B2409045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc316c2306065a0e46edd1240556fbca248e9ef75df73ecb780fb67bb471a192a. 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/CAHQJ2513541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97fad889cf0cb3358cff207201931197f95521116de86bf736aaf7f70dbcb7f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/CAHQJ2581569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9e8d8e8923d42ed5154ca63236bd3d0dc97eff214b91c97e7d1370edc36773. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:36Z), 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/CALVP2595441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e221c195e2e164be2551a7468a7031483582845584d54be0acfa671864039fb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2400879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a066401c38fe30224e8c7db4329ecb4be2451610e0bd0d535fd804f971f205d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTV32331143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdddc277a2a15746988c1af39d4cfb4a5b6a854bd4fb9b5e2a9880decd21d09. 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/QZTAS2208594.