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 0xf6d2635349c1acaa1ed86fb25d5de3be11cb7e03146b361077ca7e7eaa77aa59. 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/553453b9-21a0-4232-8e7a-50fa537cd475.json and https://artists.proofprofile.net/proofs/artist/553453b9-21a0-4232-8e7a-50fa537cd475.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 0x0c0b2b6b9a96297dd5f7525f05d47a485c83a7aec65f97416e6679503a9e641b. 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/QM4DW1739880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1ec938c8f28caccc81cc27e4630878b09ab8ea8cc23b004bb4473216d38015. 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/QM4DW1739888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b096efd50994b3db05803c868d925fd7f02224fc51b9cc818890fb31d827e63. 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/QZ8LD1931656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c989bfdeaf6ec63781f84cae19cd27505656f8d1b204bc79e381b23d07d917. 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/QZ8LD1931658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25216eb2ef6f20f8cccdc2e01be2435271d712a8aa318155c03602491b2d5c0d. 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/QZ8LD1931659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045e469d8d7cd9883519ac2ff1b8dd64ca10ec2a870f103fb01fada2ea377e65. 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/QZ8LD1931661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bf51be735dd928e771ee914716028ec08961f7ae7dee66f87eefb2825b39c8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZFYX2095042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1620d78afdda8e7eaa4f1f30d130bdcf3369cb687c27a1b4db044e5c4d3a1bd8. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZFYX2095043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba60f29e7be05cd459a9b382f04a1d4ff879382e5c9e67beab988ff74e386b37. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZFYX2095044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2526e477c81a7b6bb55c64d16b55442ada411f0a002ac10aa03c607d195ded4. 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/QZFYX2095045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec28adf0fb1fb41ef68ddb18106fba80e0e9a9219df5bf4878ca0a5019c7582c. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZFYX2095046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad9ab7bdc476b845c8eff65f611e245d18dac105532e7cb0e0bb5be0c4f287. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZFYX2095047.
Collect (Selected Original Tracks 2013 - 2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb419794acdebe0984a58dabadd658ad3f1f013ee030cde44a444e9e5552c81c. 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/QZARB1819073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5006d55ebc4492cf204a7f1f2c8452253cd63101ffa08d4a58e5cf78582a5aa0. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZMEN2074932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880c949b92ba0048a35da30448e7f1114f978b07b6435ec3b2cd2a054ca34e68. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZFYZ2156189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880c949b92ba0048a35da30448e7f1114f978b07b6435ec3b2cd2a054ca34e68. 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/QZFYZ2156189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53627c2dd99044a268ceffefd3522ef98d077798a1dceadb250127d744903d2. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZMEM2205350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fd815362e24903f5b40af8e2b8ae533a7f5bb6f3821187fce48d930cba5fb9. 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/QZMEN2226127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7214e4b0818f9c1b4a6e0771e5a17a58161d2f98eab5063ba56ded1acc8451dc. 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/QZNWV2207817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83c8705022c7b7a244bb3b032691e3b0ebc56da12def3481c3a6130ea570cfe. 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/GX8LD2256984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793a2e45ca5755b6490cff95fb36e464e1932621d8b9b5e4dcbee6fd225cffab. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZTBD2334935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d58762d8f778e87babc65f8e78dc56b03062ce2548a75e57986ab561e98b29. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZTBD2334936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b659cc8f181a2c9a8a104a5e5a42317398808cd5235320ff8342eb01f73634. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTBD2334937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fd815362e24903f5b40af8e2b8ae533a7f5bb6f3821187fce48d930cba5fb9. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZMEN2226127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7214e4b0818f9c1b4a6e0771e5a17a58161d2f98eab5063ba56ded1acc8451dc. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWV2207817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc905a4240e7ef96345cd32a508c4c6b89cd8f2f9d9ea87a149d5a55612e2bc49. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/CA5KR2409878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177c19f21b20d4bea1436ba2ac72cb6b51299b828d9ff62c273285cb68ee802f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QMFMG2321697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7748ec7b99024aec3cc85412c1d0599df88653fce1c6addb47cb1b319e96fab8. 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/QZHZD2069586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6898f3038263a3234d00189664b4285311ea2c7b16974be9967df3720f65067. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/JPW562107936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc905a4240e7ef96345cd32a508c4c6b89cd8f2f9d9ea87a149d5a55612e2bc49. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CA5KR2409878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2c508720a1a9347fd7f1e103ef6b28b317d24165c8bbe5b41f9ad72e732e0c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CA5KR2196421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5806c1840b54a698fe8559712d102c390025f9f1eeb9c3121ff5549e0cb0aaf. 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/JPV752104479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83c8705022c7b7a244bb3b032691e3b0ebc56da12def3481c3a6130ea570cfe. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GX8LD2256984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177c19f21b20d4bea1436ba2ac72cb6b51299b828d9ff62c273285cb68ee802f. 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/QMFMG2321697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61b3e59cca373bb55b2c678d38938fb84a13bf3770476bbb0dc5b58e9b28f3c. 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/TCJPB2412198.