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 0xe360a8f35260c16658434e13fb97e178180c0e779b470d20e6face4b19891ea4. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b1c2415-5937-4fa3-92d8-3ed099add742.json and https://artists.proofprofile.net/proofs/artist/7b1c2415-5937-4fa3-92d8-3ed099add742.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 0xb9b957f5bb5c9c78b7a2131cf7f7962f70a5af341ecdd994de27dace6d5c6e4a. 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/ZAHT12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e107ed94ccfd8e6cb2252ab79152d9a4c368cff9602fda0705b733fb2de6fc8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:03:24Z), 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/ZAHT12400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e8c4eab24eb93d698025f69ebdc454fb88aa34e3cce40dc455a81c7586c72a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ZAHT12400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7242ede41ba52fbf95c24876a14ddc46f5e471eb8e537acbde5c3edaf399340. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZAHT12500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5b2accc3d17b3a2f852b13d7a79ee33cdb2e6421f7a5951caba5ba94712146. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ZAHT12500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12def60fd8e93c5339da6eb4203d61a23822cf7e1873e97aa549913f91257aa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAHT12500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e8783ea0484fdfdb98e26e3428510714636644b9939f8ffc5cc47dbc7d7fa3. 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/ZAHT12500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd516e73bd9bbda1c3797cb7adc3ab0edcd937e0000d6651da1e61290bea4436. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ZAHT12500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a73b49b6d5a498550dc76872347bf00759e93c62c20611cc84851da4977fb3. 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/TCAHB2370483.