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 0xb71c1543e28522941d82967dbee97648bfb7b999561c41a3155e8b8745d6a722. 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/7977f46e-798f-47f4-aca2-b08c83377e5d.json and https://artists.proofprofile.net/proofs/artist/7977f46e-798f-47f4-aca2-b08c83377e5d.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 0x545265297d2959bce08e6e2de121e03e243ef2f789db758ba9a070a3d0706b1a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZDA71989864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742654101a64f9d82446a700412e77f802e7c1aaf39094e47d810a9255987576. 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/QZES61929203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0687dde8d1680dee3295a2bf3d46a0606406cf43b96fc0f4797ba4162a5d8377. 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/QZES61951705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f809cd49edf9eb0c1fc1444d113c642632b8db00296a3f1e77903de7094f3f6. 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/QZFYY1944887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3385e77a5ce4c00940214f542bcb57c151bb90d5bfa3dc609e28a19434c5dbf. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZDA52063564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcb8c9f92738a3faac4b1f4738e50a111efc1d0b633f255cc8fbbdb535d72dc. 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/QZK6J2025041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf994f9b7bf6794f2b3c1b79f98d33fd03699dba64698f3ab593d4de7be11bc42. 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/QZNWZ2091961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cb3cf1ea75f851aea7e4109608c7954201c22fb0c2ed0625ad909fe45aea6d. 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/QZNWZ2091962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e32704ddca02bce18fd1004044d5cb30dc754715d1415818070e23456d54b8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6M2133484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70524021ecfd35753669f73148955e6a30751cee922279cf109b46408ead7f19. 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/QZMEM2131242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf04a6fb768f20f51d8d08a1c2c8933b19c3ac15cdaefd42830b92ee73c8a3c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZNWX2101717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe72bb0797fbf9779ef56e1ef78cbd275036aaaac7b2e1fd7334fe0a1c2b1ef6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZRP52104314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1f0f145739c49206c48d1021b5bd0f75541fcb9b5fe8a51a38b7332de3ba33. 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/QZES72207111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74116eef2413852d2536c71f3f2ee0776ef468c77bed5654aea8cc8f049d8584. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES72207112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fa6361b046a22d45629e77207b379683fd560cbb8a03685ee2af949d01991b. 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/QZES72207114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf41a4fe51410e7055223aacf2c94f52a732a325ee02c077e5f3d682ab00496. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZHN72271412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dda3649f3d1844d47a9ea7f8e5f7c5ec714c72502787a5472d7062e4f0fbf6. 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/QZHNA2275508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2e4d4bad8ffc4f59aec79b986947c05425832e967c454dbce234ad3afd6a5f. 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/QZHN72272337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634e9963e4d4766e8bc09c21cdcca151c16ff36862b923b2de2fbd7821c93761. 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/QZK6Q2241724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8f792ba72ef4aa3a73780a1eaa6724376247185ef918cb8225fb66c1bc4efa. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFZ22387815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f91351d36e413b4ee0f721d688910106016b5fdfac1f8d5b9382c5668a01b5. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZFZ32322472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490fd97b0daa7968c49f55f3600c9b0039dd930e0dc42d28ef5e86b51ad0932c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ62351725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82cb71f3974c475834729820cf3a0d5a600c2c1dcf6135c197236181fb3a173. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES62368170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f1f7b7c2569117c2940d4ad7f11f8fa18e29f29e1e6aad716f51bf5339a545. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/QZES62368171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacf522b4b046dc9b072ec72b6fef79f563965e741ccd1adbd3bfb35bfbc0091. 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/QZES62368172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363741d6808c2abd2b256a95b66869547f32766d2e053669f5cef9fbd1a7314f. 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/QZNWS2315969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76375803c2bafd9d0c5db13db2b4e2e50845b74b166ab4f327be066bcf3caf42. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTB22354585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e0327d9336759847683dee54d993c8f536a4c766eb826c184dff91a0d77bca. 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/QZFZ42416800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb062ebd88ec5768a808c89dd6b221736f20b6cc7b2df863135202fd0db363c81. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZTB42401013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dc644346f90b2bf17b9e376387da225fe7e46da3fae6113c43f5f0335d40ef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB92292060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9ebb766b4fc1cd0d3f30057d63c1ba5fe6f8406148d42e8eed66a2665aadc5. 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/QZNRS2091683.