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 0x9886431f1e36e6f4739bf5a8c427e8f9d4d0b13533bc176a5970ca4be79f2fa3. 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/f57d7069-91d5-48aa-a095-d7985e973a69.json and https://artists.proofprofile.net/proofs/artist/f57d7069-91d5-48aa-a095-d7985e973a69.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 0x1e2922ba6ea1a5c136262acb5cd543aa085601d9ea8773d2790990f61056e538. 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/QZHN42433673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84167cfae967f83fc2bfb6f3586ed498c49a487d9074b2576c9d14faae2528f4. 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/QZNWV2462429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9162e8fc827671979e0553c6f556d31975aa4b43ff70d1e70412c23c8d407f4. 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/QZK6H2478032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde0491de4b1bc73ac04b73f535b7745160d3bed863b73136d2a69f3d24ca82. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEQ2454094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf192edee8d97cf3d1771605e1f99a1ae308702195119f8091fbf0dd348ef3202. 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/QZMEQ2456408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abf5da5ee32cc26e41c61baf1f78e22b60f4d93ab19d0eeb5dbca85f018ddff. 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/QZHN32459689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196a2770dd35f133849c26780a7b51e5301b3831ed6a3a940b4a102df7b7234e. 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/QZES92407302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea795133683e5f7e9df55510c1c69416447e911d77ebe09a7314c158b660260. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN62478623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dad7df08ec35526950d8ba8f8e4318a73a26fdb19701365bf6d6e09d03c04d. 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/QZHNA2315085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb3da974e39a8128dfee2b0037c21b8db317cdbe26d17d781b0de1af35f93f0. 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/QZHNC2429082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c632830a84b4ad0d9e41d7cfb8f9a189e2f9199b143e0abddec26b2511fcd53. 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/USA2P2460330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f488b57aa8d16f02a170ed33311e59ca43831becc3f9bbbd52f506b7f7e9e33. 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/QZK6M2406916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1182d6adcad64ab9641377d7b1fdda99858cb28ac0f3d63c3243e882876493d7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:09:09Z), 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/QZK6M2406917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46449a367fbe1fe4c1dea05023793202ac83783ab410c487522ba96a71364e3. 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/QZHNC2400272.