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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161cb23c565420ad85387c7cc6c0c055581fecd41a10424e3e787c5b780d8258. 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/d822e599-fbce-4918-9a60-620d2326ed0f.json and https://artists.proofprofile.net/proofs/artist/d822e599-fbce-4918-9a60-620d2326ed0f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71437e16af3d4a95ff58341d7b4430a0390444795a2ed2508740c1caa1ebd6a2. 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/QMYW20400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7521ad698e93b730533516b9a168c7be323ad86117ea03070424b0d8348aa19d. 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/QMYW20400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961a2d85c0c1d911cffc65ce03820b022362158b18a2978add14a25ae8444586. 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/QMYW20400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1ffd8cae88dc857d391a84e6e880451153888d27bb6a70d18cc99bd9466ea4. 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/QMYW20400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1a027d2c9a93ae183c3a3e164168373403aa1d2e73b64c39eff6bb0a63b677. 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/QMYW20400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542e3daa2b67826f3ae1388aa13b50b32fb5dbfa3b8849dfe395bd29d8d158da. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:37Z), 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/QMYW20300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e3563b7222e763d912ed6c15439cc676b842211106d060dd1331941f4e12a6. 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/QMYW20400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337b7e7ae57ddee2f9ef8e63b54cd9615c4544f22ea0c5be58d25de1d3f3f9fa. 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/QMYW20300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f2288b8bb94c9f81b618dc3bfa2450264749ae812092689a83f89b0f7356f6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:53:15Z), 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/QMYW20400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26a6fc7acedbe54862d94692f9ac12a19ec854adc49bfa4eebdefde020d5b46. 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/QMYW20400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e3563b7222e763d912ed6c15439cc676b842211106d060dd1331941f4e12a6. 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/QMYW20400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e41efade205d3ae609072fd2f5c56c54a2576fb06bf4aee67027a51e66a3f5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:01:02Z), 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/QMYW20400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57ceddd17fbb0f732d73e8c3e86f09879d10fe0fb145a500e463d2828be1637. 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/QMYW20400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7521ad698e93b730533516b9a168c7be323ad86117ea03070424b0d8348aa19d. 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/QMYW20400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85a1763e44f6b67deba641694802e5fbcc969c7c26e9d23f6cc6eb0f5639dfa. 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/QMYW20500732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd547a51faa49d3acaafc4445b5b1ee9c5e18bea01e39c78f44a7e11c4f8c3d30. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:24:26Z), 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/QMYW20500707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff832f388ec87fef81c559ffa28046afb6334dae0cf4b32b9429198de59e1ea5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:25:48Z), 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/QMYW20500713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4849341ce3362093c496c36ad1cc23f7aaee4b6d6ac3c04bd95e0d1ae5658e2. 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/QMYW20500697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd7d42163beafde8becfaccbd3ee4d8e425139163a1483614d7c2019d08e92f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:19:11Z), 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/QMYW20500704.