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 0x902255498ab3acbfc0cf53fdfa755230437cafa53825536d48a5779cd66dba1b. 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/c679cb56-681a-4df0-8c5d-52d7e8744e72.json and https://artists.proofprofile.net/proofs/artist/c679cb56-681a-4df0-8c5d-52d7e8744e72.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 0x189eeac37377b8bf8d926e3f34f3a4d331dc90ce3ed176b006416c103f973587. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PT7EX2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189eeac37377b8bf8d926e3f34f3a4d331dc90ce3ed176b006416c103f973587. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PT7EX2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f72853315c2ad8db1bed8fff686a148087b6e468f1924cc68963c689ff02cc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PT7EX2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f72853315c2ad8db1bed8fff686a148087b6e468f1924cc68963c689ff02cc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PT7EX2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2956cb17611bfb6937e843bcce161ebc957e48e4b991a3f79263fc3a04ec8e4. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/PT7EX2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2956cb17611bfb6937e843bcce161ebc957e48e4b991a3f79263fc3a04ec8e4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PT7EX2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2f7acb82d0df907de4768bca0356e1dca7392a606ca706213268cef90b34f9. 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/PT7EX2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2f7acb82d0df907de4768bca0356e1dca7392a606ca706213268cef90b34f9. 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/PT7EX2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a96d2b91fefddaf52715b673a522f4d0cc2caa27a88f341bced1ee952ef3a6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PT7EX2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb604a9097219dd7cd691b0c5a3bc6882c699a5474d6cd739893c7320a13d130d. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:05:15Z), 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/QZTPX2497005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639f3a622ebd4446a0cabfda64ed7e37a96a8751a92d72573428a2bbaa46d490. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJZ2545174.