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 0xd91f3f0de795250fa0c06dc03d4e43693a7b8b430186a1bfd6c392d760e1e842. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d230d8db-1a99-4db6-aa29-691df03a8021.json and https://artists.proofprofile.net/proofs/artist/d230d8db-1a99-4db6-aa29-691df03a8021.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 0xc1de4edcf5a509b756e3d9262c67f254ba371306876e1111ac78205478fcfa97. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/DELK41200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6049b3d4695dc684ff6f76ed4f3e9a83ab17ab5e185e2c85a1e6e7c7ccbeda. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DELK41200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3f284a67cc51f4e975a3a77c63d07adfc779bdfcb7ad4346400871c3dd3329. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DELK41200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0d1b496584252de379d0de9debbd58505d3e23f6bf2d86cf6c0567aea48345. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DELK41200604.
Du gehst niemals allein (You'll Never Walk Alone) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8161f5521b3d88d3ec3e5450f45693a1912ecf5da68a4b8a45b52bca6eac42. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DELK41200608.
Wie kann ich sie lieben (If I Can't Love Her) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55273e28681447210eff302c4ee807f9751e7cf5fb8f11456b3b7f6d21798b7d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DELK41200609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12075c0c03449f00cba003293e0492102489a73d1330c0a3902835d542e53e17. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DELK41200611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23a1e476a66891273f4e35cea3807a9703425cc18485e5147eeba34c7c9ed85. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DELK41200612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6457a111b9784330b2c343c7095811c3b814fc57ecce1510862524917d3efa5f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DELK41200613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676a94edda3eee241eb0cfc912e5d184c1e98a66030bd7afb6dcc303a2a06928. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DELK41200618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eaae99612cc1ffc9e4b2dcd2a04261f649b9ee7f1c6461fe0c134c5bda5d3e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DELK41200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c6d3e5291335e464738eb2313552c0edfc1b4531cd8c7e69cca513b4bdd9bf. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DELK41200623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417fb97e13eba800aa7736574786cd95700dfad6b89fe6571950eaea63639c1f. 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/DELK41200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed42bee4853be761ba152c796092ce26b6b2f7db4c0e579c3bb03e77c4ed268f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DELK41200625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4d8e729893e4fa6babf5151876175fdbe5e0667853441d4e82a0799fba6f07. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DELK41200627.