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 0x50716f63436744003a270eb5807c084f1f50e269431d97b3088d09c67100729b. 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/9536544c-279e-4d41-b26c-a953a1163083.json and https://artists.proofprofile.net/proofs/artist/9536544c-279e-4d41-b26c-a953a1163083.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 0x60c26e5e2901e6acca5ae5d3cb71432349b9b542ec8d7d4f22a65d25e329a476. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/TCACL1615879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02771a2cda01de539aa8088eab02cb7d8fe529a885a05d5ca5d37769f406f559. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/TCACW1794817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a81417640fb2c701bd0deec634a768e9d0efdcade9a9f1b2a2282ac0e381182. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:43Z), 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/TCACW1794818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efb71827942c091d3a4977a51a318842955179e3e39e426de6d9f3e8c34efb4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCACW1794820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976d2289d2a9c9d92c14c8a7c22290f597dd86be906af7d9e078120afc979307. 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/TCADJ1714835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21ec530653c67bf179745c3f00fd17e6d6e004e511593ca6e2e4c23c69a6d89. 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/TCADJ1766375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232a4ed6459ba94df8ab49544973cdcec3696b9e391f67afab7f4eb2fb125bb1. 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/TCADJ1766379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b801f9383a111274377027c15459ec3aafc18007dfff3bb99f9420fed1a6afd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCADR1819105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f1c69674879ff599d04b7e7ac39fc067cf59bec1ed7d5e2f3938b271605261. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCADR1819123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2694223448514a07d75f823c8b483fe13d2aa5afda012bab68dc919db0f7bb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCADR1819125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe9f61ce9e25d03b81fb796d0f4b207e398aa52a7cd094941b597d0b7f1ff6e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCADR1819128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e214207f5cc7f00da11a2ade823d5036d69d9a98acca24ed2d3f3a3e27fc23b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWS2080255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ca4acccd3f9a4b9ff2d974cfa85636c6482dbeb7e8c22189bdfe20000e9aee. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE6XY2318272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ef3e7e62fef2f9a54b155b0a8bc9fcc03235ab201c890784193b29090387df. 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/SE6XW2305119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212378938399cf2adaabe7022676ea86d1215a06881e3b44f8b10af3f512e648. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE6SA2302990.