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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e3e51252c20b1ae8565df47b6193296324ba3eaad3afd7197ab944e53f9b1f. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b038e257-fe62-4b49-a1a7-39536e3593ce.json and https://artists.proofprofile.net/proofs/artist/b038e257-fe62-4b49-a1a7-39536e3593ce.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddea199449ef0631f0e65453006702e8b7c00e7ea11910f2801e4504fc3d2b6. 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/TCAJR2591519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b3e16c06cf0882dff54ce110a0614a9b34e7565cf99787faf27236e84754db. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:06:34Z), 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/TCAJQ2591526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839be883ab0ec4fd4ac73a8ad97e2bd6b94ac9b4c09a72eec2061a31ff1d9ed4. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCAJQ2591543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad88f9f1d663c0aa14b0bc811043ea03c1a5a34711d427c37b270b74a7f7214. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:03:05Z), 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/TCAJQ2591549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263ede2f762475bd47112b021e60e64aff17417eec5dc489fc64303ff73a5ad1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJR2591578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00fd150a257bba387e663850a896d54c97ccac3d1af490864b25924e029e326. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:30:44Z), 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/TCAJQ2591581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8954ff21465f15ccfbb5adcee7aed2a8ee3c36ee707b4bbf56fb0d263a950867. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:54:54Z), 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/TCAJR2591582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b930f2345f9e308080161af2d0d4d6e45a3499560885ec948789eeac56f70b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAJQ2591584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde41f024ebfa2e707f0ffae02d2fd3f4d26c0e0d97a8f7890c5f6fb1deeed46a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:53:34Z), 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/TCAJQ2591588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3178124bf3662fec3961a6f05dbc57b1dc834b9b23c742770ea29b442256997a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:19:34Z), 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/TCAJQ2591608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24e12f71bfd7c981ab0b3770d636405965b9bbf804e0f7ba1182bb6acd98a5d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAJS2511503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b7b153d790d754456e4990b3d1e038e945aba8970703ebe6b28188637af958. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJS2511513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef41b9b42f8c628bea5884a78342156b60e632bdc085b81a4c35239edf8312cb. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:27:40Z), 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/TCAJS2511520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f41094a2edbeda9b815d4f6f625a3f0825b0e5979c5c74fabaeee2d6eeb457f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJR2511526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e1e2926f31a7eab43e846038910076a7da408f57e71573e72a70326bf6bf3e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJS2511535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83e79a1742413bae36aa0747c69dc8a02acd79b9061d54ecb3468794a1597f4. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/TCAJR2511583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07bcbb6e169c649ff6fc78527f7bbacfb2f1463bac7f12b69e51709ae53ef54. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAJR2511604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9156ae2509ac04aae3de1ede4e11f81850ed65ac3cfd7fd7df910ee247d4038b. 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/TCAJR2511623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b1e3cfbcb9cd776ff55b6e808bca9e38ea46a45cfa0b3e66de854fdefdfefe. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJR2511653.