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 0x4f6fd203e3ec61ccae02327afb11601ae7140b7ac997a9a8c7087e83fcdafbf0. 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/d05ed618-3979-470d-9996-b33da3b7e066.json and https://artists.proofprofile.net/proofs/artist/d05ed618-3979-470d-9996-b33da3b7e066.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 0x7d33d7e9c647770f275b9248f32045f4f4a7bb9a0004343b2764c04f027d02e6. 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/GX38U2532436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f82ed5635aead861c5c681092c1fa0f7be9f4090fdadd9c8073cdd1b9293363. 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/QZK6M2159395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a9fc4148ffe4c64d039ecc2447cc6be50fffc980f8f19b0002a8a618e7f13d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6M2159858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456d4b8ce65e90dd404d446effdd7f1d150bef2fb75063cebc5470594ef07e72. 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/QZNWU2217267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eea404595c5409d40d1ad77635554c5d06c6c7e1d40ec17af2bfc386e4f684a. 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/QZTAW2220592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c173ab69cbbcb0bcaf1f4605e2ed0db7d3f747a9b0a2c3db8a9102b7eb4a27. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:02:24Z), 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/QZRP42372232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1228fb7842f6d8a938638b59f803d23a0f5f4dd218eb160705f2a3d4f570d2ea. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:33Z), 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/QZTAS2316292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d931649d27c84ccca10a65ddbc65fff8b1bada78264f1dfa038108a4cd9f9c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:57:59Z), 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/QZTB62335782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda289ab3ed457e44f99fd8acbe3ba56bf886cdbbfdd5578ff81ab5d568f58ec3. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:03:25Z), 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/QZTBB2392814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d1e9d956bd5efc75af7a5dba0e905acfb3a41a5a62896d1016ba42ae7e4563. 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/QZK6L2488064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ebce3de1de5cda5dec0b45fc51bc7106596b9dd2b347d32fe8efca4394a798. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:50:15Z), 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/QZTBD2481429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a72b5181b049da38e2960d2110a8cf3f46f4822bb4eb20069f68f30a2afa47. 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/QZWFX2464975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25ef23164b49bcfa66ea41dc05bc805a49e8d7cf1fd54c7808ae2412243a310. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZWFV2497550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68881905a4d10f9ceac79c01f69ddc25d1b1855088bb81ab31a2274c962e17bc. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:40Z), 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/QZZ7R2420304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daa7dcf7815ba457ca5ec22640823d1d35312edc670951d1135c8d2cd621731. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:23:59Z), 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/GX8LD2516474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cd764372796ced062ddb1fe0b1a5a1b691b18ac6543888a197897f7fb6dcbd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GX5MX2519145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4c57845b8aa512e4a90f0e0659e9dd20b844447448d494860cc76b2fdbb9aa. 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/GXBDS2599092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80984278af06df2e7f0fb6c5b96d997fe7c022b321369e3871aa3832a326c921. 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/GXF972551606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472c9eaf5bde7ee4a54b172a285cf9c0577c4c39556397c538fdb74de8f7db1f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GXF972563543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744d8a989bc1db555114a529f0f368c8b46b85f9192e9cc076b02f0fb983b59c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GXF972525626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242202b082eb6a7de951aa32bdc6b215a6b6ed41e8b00af496c527d9bd9cea4e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXF972529879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bbe94cc6478f002a1fd4d27ea14a29b556a07fefeff7ba70714508248d49d0. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/GXF972564185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8d6fe990bfec1ba5e9c9c2577b7778761686fb594c56c6fc60e2406093e1ed. 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/GXFHP2575428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc842998732e06aa488331583d6c6792016a258787b06644f33b6f3dd3583de1c. 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/AUMEV2433186.