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 0x833d9882f342564b34d8cc3bcc753ba7b2ceddf5089260bcacaa9e249ec821fb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bdc7dc3-94f1-4268-801b-e53599d2b375.json and https://artists.proofprofile.net/proofs/artist/6bdc7dc3-94f1-4268-801b-e53599d2b375.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 0xd52b8a5d948b33e7d04e5549d1a5f549f8f798eba57a2c4f3f1c124f01265981. 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/DEQ021903509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071dfb7d67aa0dbb84a2a8dc3f7ec3251c350a77bb384effa873e411d3213a1f. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/DEZC62265020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57a6e68a8b1b56b0a133964bfa54d326a0733c476aac3f2342a6feb01d24a8f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEQ022281479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a1d1c39c2cb69d8e5f8721be8da53ad0d3be6babff2773febd7b237c5c0575. 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/QMANG2242220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a72bdc596a720a7f2d28d980e1baf7664256e287c7b55c2510ee86a51b3312. 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/QMANG2245179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fb7fbf518130f4121c7e20b2e3fdbb57859a981348acf5b6f28cdec920d992. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QMANG2245184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f2b5d7b40ee22ac607ff1f326fdf6d9ebeb6b00c4ecb7e2bfdbfa2b514ff53. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMANG2245186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789cf71e6dff2d70d6e3876e3a4a5341ea70a4d6ee51da05b15541ddd53edae0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/US3DF2431459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9f2f2e905a8039d714a3ee43328521cacd6963d2338152b64bcc63d8d70845. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US3DF2450679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fb7fbf518130f4121c7e20b2e3fdbb57859a981348acf5b6f28cdec920d992. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QMANG2245184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789cf71e6dff2d70d6e3876e3a4a5341ea70a4d6ee51da05b15541ddd53edae0. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/US3DF2431459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7af8a7f39896a0473d5e0a065ddb578ea51a52abeed0590c6000c79fa40b7a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3DF2459991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f588c09328d4e9179adc9a22fcd4299f1cc5c659514b666a0b592a27959a96. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF2459992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b01560cfe4308a11ac0fc4e5aa29ecf5431a274b891f2e59f6e5ef48997295. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/US3DF2501631.