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 0x5d5b3c4d4733e31916d9b6b953ffc5f2c14e4176f8807a8dc5d6aed55ab7480a. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9da2b13-1e04-4011-8028-d8ba1e3adf8d.json and https://artists.proofprofile.net/proofs/artist/d9da2b13-1e04-4011-8028-d8ba1e3adf8d.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 0xa69079401557b699fcdd211e6d2953baf0bdd1c81e07e17963031570fa47693a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USA2P2202822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3607a4982ca45e90b35ecad9a92ffe30cc5241e3b4e41a3235236dcda18a34b0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2202821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c15058c75378a8cf67bc5b7bc1bd5d40c57916dcf33080c70b5dd7e801ba8a5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USA2P2202816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a5eab2a506fefde48a27f441c51aa948e503339f0112d46657a40c7abb691a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USA2P2202819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a50a760f3bdcc25482d004ed6356b2aadc5e2ef8193eb1d373d870a4e023d88. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USA2P2206744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff550e4e745c8df235dab00e5ae5371c32036df0b1244da843af879321cd239. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USA2P2206749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83debf514ee71864a8e45b6de3a24755f107d7689f0110d2258df704e5610ec. 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/USA2P2206743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1f7a34c27966798819646f07091ac7844c30b71d4c0ccc427993c97d8c23cb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:11:44Z), 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/USA2P2206741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c7d768f352d9b5deb0e5f1a795bcd1682d51a16713874eb197907a9d96dbce. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:52:02Z), 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/USA2P2206745.