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 0x175420a811f3312f4a93f5e27ab77ea4a1e7781528d35c9da10b455c2d0a9b97. 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/d72e8fce-8fd0-458d-bd9a-4363392e8d3a.json and https://artists.proofprofile.net/proofs/artist/d72e8fce-8fd0-458d-bd9a-4363392e8d3a.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 0xc826a8a671696cd3bd04830cade96e905d6fc526a020b56b9cc99a7874f021a9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN52333429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c0266ffeadacf13adc5b5330a1529b56e32316aabb961928274ecdf55c1663. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:16:53Z), 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/QZTB22352578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537c3abc48ae023309fb7f8347144a79be31d205a741a76259fbc7533499cf3f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUMEV2465294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ba57e679e36c966d39bd95c941e02d92a9f15d7053481302b8789554becf6a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUMEV2488572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7a4659b05987d79103fbbf226cf435ad87394b557fa66ca89cc2d1e11fd8be. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFL2460846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42582ed72223a0921c725cc30a817505f85b74d3e9782cb6e84c3352f3c1fd47. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/AUGBT2499059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8438b34451b41621071de904e8240fa916d401cc7fc1c77e1969d52299edcef. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/AUQ9D2400898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc319794c05c383f4b6d78f6382359c04bd495241b8e043904259477e2a412292. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:57Z), 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/AUGBT2519636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfef495896bbe42178ea6b8d92fab5812946499b13c66cdd3a82bb2696d4b978. 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/AUGBT2519640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe326d9d9afa562d2168d677568126b997f3ec543cac4c9b51de4158761b2ac41. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:29:23Z), 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/AUGBT2547614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0966624e1574b688d529a3810f24fd0cd64f4ec8b66021414e488398f2e336ee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTPX2425991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f8375275c442f993afdc8565ac537bf06033ec7ee3a5fb9450a1b5acb6bfe7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUGBT2486372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c57f8030e22045f4b42b3e783002c63afece53b4864606a2443ca2ecfb07ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUGBT2469418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8359bf5fb3f42b83f5b1b9962e50209062cbd9ec8151f6f5f3d4aeab2042166. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUGBT2501066.