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 0x6d31e99fbebf6aa7d307ddb5b2c4523bc519244184f5eec9e181665146abc01c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9097a1f4-0bb3-43b1-8147-5119b385684d.json and https://artists.proofprofile.net/proofs/artist/9097a1f4-0bb3-43b1-8147-5119b385684d.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 0x748d7a97a1ce552fe92d0f56a1d72323a9e6f98bd3ca2449b23d8bd8f03def44. 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/DEAR41942082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa69ba6ec3c1aeeaf9cdc7a4c21bf4fff10bfe4fb1ac38a605be79de65c3bf12. 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/DEAR41978662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189bf1b8a853b6aa68dccc85097942e2d4a24cb1dc9e3daf6644a101ebfce1bb. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEAR41954059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87572cbdfc8cd9797e37446219defb4ceb5e7291fc06c15d9834fec5cc497952. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEAR41996284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8329fcc218b823677a6164239c5cc0b43a9531ee94f42cd431d4038d11b65ef4. 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/DEAR41958266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7530d3dfefe3e429b477c74a11866411fe1f86dc787f309b5e1b81826ec97ef. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEAR41981417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd81d42b6b2fb375f2fb4b40710cb9f93b673275a4451bf68bdaefc3da074033. 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/DEAR41936329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ab51d2612616140847dc66d11c77538622e6e13cf12621fa036cf1dd083a5e. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/DEAR41642318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ab51d2612616140847dc66d11c77538622e6e13cf12621fa036cf1dd083a5e. 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/DEAR41642318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c836c3b5abefc93d3e05cb4222fdfd16888084070351d184315963390bff71. 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/DEAR41832669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c4d865d53676d8ff5bc9571b583f32cc5fedf08c04fdc9b3c2dbb664a26d50. 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/DEWL91700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15c679575e07ba7465197442ad8881a3952cdf8d028216f3c984dddbd1b4466. 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/DEAR41877519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d89da0558e7643383a522157fd9c8286165f30b6d93300de2764682865190c. 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/DEAR41896234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060e0648ad69b7543d41c2e059dab4c605fbf071226dbc4d0c07b94447346189. 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/DEAR41738301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8a0df4050f3bbd7b82191f99bf5c95ce6c5e3ccd9a0c7f0baca85e158a8fba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEAR41642154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f8602b5e8d0a5106ca1ac076cb7c89fd9c75cf971bb3a551250eafccf281af. 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/DEAR41711852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b79d05170ccc36910a99a764d8d320d9530423c9a7d66d60ce07364200c749d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMEU31413706.
Dat is Punk dat raffste nie! (Volumes 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31faff8d59cae5180ca7dc083efc06ad6927ae3f80d471886ca9fe3b142e27f6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEAR41880537.