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 0x54edd27098bab3165dcbe8912727fc92ffb43a2dcd8f3af2d10e2f9e1696a8c4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffe221a6-96f1-44d3-9499-f6a7342dbdf0.json and https://artists.proofprofile.net/proofs/artist/ffe221a6-96f1-44d3-9499-f6a7342dbdf0.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 0x96a220025ebefe4d9fc9a653958842fb0043e0be25e6aeb8fc854c17f839825d. 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/CH7812402454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb96cdbc4055a98bda2fe03552d3015760ed83d96657b5572d95984a60baf1c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEKF22100800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d404a010797a4c53b0ac72490d30d16e9b09148cd81394abb52d8e5a87d480e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEKF22100804.
Tresenkraft (feat. Faut, Obi One & Flex62)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9bffedf9c5785f27978ffb4782041dcbc7d237843753311912c980df047796. 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/FRX452042477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9bffedf9c5785f27978ffb4782041dcbc7d237843753311912c980df047796. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX452042477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b08b4b814f038cb804fac3d23a1d66b9e42466a292931408a016af0e700227. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812346303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc232315e35a6157053eb00fe2325c0cd279d072c9ef8f8b9f00812cc183fd346. 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/DEKF22100568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dc36b9fe36df14a42f13d0a081ff679ae53347a87b4c70443b34ee41920b69. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEKF22100681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654bebdbb8e09654bb189ae657618f525dfe2223a1784849edb61fe386838f56. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812355824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e085cf296cf52795b5cc0f4b91d1e26cbfaa310b43183bd5549e05874b3ed6. 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/CH7812355825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599a6b8c9a0852fbd8c4bd4ee99e836e3fedb35e7fae2a122ffe4d3506373921. 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/FRX202034249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81efbfe772ac5061aa3a6530f32f2444d364b09d451c1baf74229e564ceaa3a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FRX202034251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f4d3eef582febac94cd51ae70a1408f193a5f5e3dc582872085c7cd58e8077. 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/FRX202034252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a635ed4555d9777a296b8d809fe39374663b3877927201c74fba7547682658. 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/FR96X2087892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2954698af7e108ed7aaf4737a5cfa2db3c128504354cc9cc25e468135a46f789. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX202034257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc232315e35a6157053eb00fe2325c0cd279d072c9ef8f8b9f00812cc183fd346. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEKF22100568.
SPERR SIE AUF (feat. Faut, Flex62 & Wena41)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2e120ac9531daf03f7f41336004f28efa6288f6bf930f3e5a17985b88fe219. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEKF22100526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a635ed4555d9777a296b8d809fe39374663b3877927201c74fba7547682658. 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/FR96X2087892.
Leichenbestattaz (feat. Flex62 & Obi One)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d8bd3098733f832e2d818477140d3fcebf96b99ed046ea5722a9aa5a445551. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR59R1995704.