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 0xdcd7626b58f3c3f04d2a933dd6b942e821ac17d4887766e39565218b32fc3075. 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/78b213cf-5938-4d33-a73e-fa6c742cf7ea.json and https://artists.proofprofile.net/proofs/artist/78b213cf-5938-4d33-a73e-fa6c742cf7ea.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 0x1b31783e2f73cf9f3a39c2f6797318956aedc0c64453b738d0efbf1d471bd964. 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/USLD91745733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e0660daa27af7fb4a83299ae042557bfaa38aec05d501b2af48fc573bedeb5. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZWDD2357322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b52069f21d4b79d600efb6cf9a06f605c7a51f3f364fdeda6d7b541114aa99. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLD91757877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bed294a1bcbed53558055998945df8b6963e1ceec01889977ca77bef541905. 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/USLD91756215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6613e50f59bee234829255b3ad2df853aee4d99a818dc54d4ac5f0da7055bd8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USLD91757845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d394127385eee54b7fe2a9e11a0c058355d7ffad3b194b69fa40e403adcf16. 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/USLD91757883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccce869eac79ac8fc2e6413a07d860a8d8789b1d142c4a737260a3370cc807a4. 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/USLD91757884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1667300330b3d8972383709edd86abaf3e4a2683d44731f8ce627437ceb3b2ac. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USLD91757878.
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 0x03024083ce2066bdea23859e266353dadf1c83445671b8c5f8ab2d8900feaaca. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USLD91757879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcbcc29160c7376df54f137293f0cc5f55b5cbdf5b742941ed547b17c1eecb4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USLD91757880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706560dd0260ed8f02e480d1f8d9944729a5d90f49cbbf9814c7f1610aad96a6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USLD91757025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1cfa0f44261565fc4b72f16064d65aa0fb483bef513a17ff69925fe48a2b7a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USLD91757881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4a390cbd98c3fce32a7fe6e0cc3baeb4fc8b437ee35fde98e4a26447578b5b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USLD91757882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddf5d41563405dd81c45ecc7788cf6326cb626b852fbe02ef8c7c20fea20e54. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:59:01Z), 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/USLD91762758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f66b85eeabb91431a8041813e531a9fa369b202b529b7cce5f7b5426400f5c. 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/USLD91761547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9903583ce4c6ce72d786d2d7ca51830c35be66199a29b054032b301fd2971ffc. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7X2500142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff84211d4d902493884675ccd4139fdd6c7a40c8cd3c3d49bb02ede42dd83025. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLD91784488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f16bc42d4a53286813fea4293acc0b3c2ffbcc96e6f6fc0a5922c46578cda9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6M2218804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f16bc42d4a53286813fea4293acc0b3c2ffbcc96e6f6fc0a5922c46578cda9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6M2218804.