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 0x20b25339d048e72d5c7370e716b7a8e460e03f8cbb139fafd1920f608b116972. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e38c4ec7-c70e-4d61-835b-f41812fe23bf.json and https://artists.proofprofile.net/proofs/artist/e38c4ec7-c70e-4d61-835b-f41812fe23bf.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 0x03468e262e946d63e1474e69785b1acbfd959dca07c71f0aa000b68db3543994. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN62565563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a6a3e41283e3370cf213f2db357486ad99aec34940d6ef7d55a4ef5da8b84. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN72516647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7db40b6ea99d9045d2cb1752322413206d20ae768f80c250775be5d35866fc9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN72558646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547831b8f74f19eeb1f05f9e55f88e27326a9af64ba15f413b747975bb83a862. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZHN72556730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6167bd1a7fb89db16ff49a03f4c98f6256f93757b9761fc1839cec948033ebfb. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:07Z), 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/QZHN72558652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c0cc53b7eed54e527febc8ff5645703f8223f943065f682209c0353b02cd0d. 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/QZHNB2551031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43c430c0448ceac4320119cfa003f51bc169240ff3298dd7b365a22a1db0535. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6Q2581455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cec94574cd28b577260dcdd9cc42b86c94266c26eb49489dedc194e3edbcb15. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:56:37Z), 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/QZK6Q2582900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9ed562c52dc1b9cb1ec48b90662c7070512f7a7d73a9239d9d1e9e2271376a. 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/QZK6M2541782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae98c5e626190509c8d92b66a4ead165c6b3d85a392caf28160f00d672d4f24a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6J2510685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd0528b8158315cdca7069c0e48b665f3ce752fa24053d750a5df9a037f90f0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6J2505046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e325e9fd356f411b4f6f744b86497e48ad667d0593b28f588412f5b42e2df8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMEN2596907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc526383c616d8f46cee11e203012ecb6fb8aa261335ff0348042e5eb42e31384. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZMEQ2553674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4a52fc544d6cf57c8a3bfa71bcc693baab3a90e78231d80d85f1def9df6636. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZNWT2564479.
Wo ist der Zucker? (Einzelhandel vs. Kunde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4999f53951f35354eec5adfe7142ac9a9ce95c4398548aa890f79fede61855. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFT2529560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c5aec9b1f0f0eb7053f2d52f1d0c6cec024c7de4c493942cd51e4f84744351. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFT2531740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae53fa24bfc30a22c59daefbf3bbb8f50610e1debf8e80b5335699b60aca0c2. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ772508976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56db839a7e8114748dd2e6d424d19cebfb6f4de6dba1093601a05100e85e2b42. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:29:54Z), 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/QZZ7N2583371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf087c71736f10cb3cf7c153ea57da399cc845f993d0b1f30fd55d07ecbc0ca. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7N2583223.