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 0xbdf9656fb70b680fe4ac3970e27a5e7b41d467825f094a0b46d494f13ae732df. 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/86188bf1-d031-48cd-ade6-af0ca7a31630.json and https://artists.proofprofile.net/proofs/artist/86188bf1-d031-48cd-ade6-af0ca7a31630.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 0x04c0a58b5fb5c16d36598c2f214dd8901b38791116c15c838185d405686a6dab. 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/GBEWA2100871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0709bd399ab05ec9691c9f7f83321f58151211d4396140570161a5e1e4c031. 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/GBEWA2100872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db563222df79f61a3b4ae628dd547c55b2883d0e8b2830052a92af1c77a4fba. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBEWA2100874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0434198138ba922b7d1b3358a793d8b6989cb4ed99b807244a6bea715477a8d. 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/GBEWA2100875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7bc0f1113a8ea753504312153b77e5f48654666c6f6d49533afa88c3984d5b. 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/GBEWA2304350.
Let’s Go Back / Machines / Heart and Mind
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8caf2e969c16ef6b087edd90a1969d15d4decfbce5f14018388b47dc1f8120b. 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/GBKQU2435911.
The Dogs (Original Motion Picture Soundtrack)
Project Ithaca (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710d25bf0bd4c720e15853d7914780409878dbb745bb2872c0075e5ad8020d9c. 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/GBEWA2201475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6f7c687bd9d90997b2b1d123b09790077f77253762945eeb7049b6753cccab. 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/GBEWA2100366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17327d96288e2d4d71195ea1e306a6392e9c5acfd673203129b92250d2d53a7. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBEWA1909505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3eff77b74fb78501aa47ab061db608fe1c86a008128248b2e07a404985f5ab. 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/GBEWA2305203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758f6293f9de2860b66c3de58a76612731fb15b7c872826d1141b9920f9f9887. 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/GBEWA2305058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dbff8e466d8f5ab4febe8324844a409a0cf288c8d5149927c1ab899e841435. 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/GBEWA2305062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854f7eea66db0cceb47429a1da330cae84bada8439c7ee96ae6c0eab0267d44a. 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/GBEWA2304410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ff8d6cd3ae9ac996b2da2714cabaaa126800ef962c7c1f3bc7bbf193c8a323. 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/GBEWA2304413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4339653b1407370cb4c17fa236016531cf9cfadded520d14656533a95c47f199. 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/GBKQU2450790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcef55059d2abe617a36ca306eb477c8aa958c3f2777773777734c7834dd362f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBKQU2436773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ad2e2c0dc6152d5e01ec73855f8a4e4480622baeb25521ccfc343e36bc6eda. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBKQU2453206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fa83847f99152e653f7cb60562dda921eae1bfa5bc45f2219172fc0d5c140a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBKQU2385852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f715e6a2d88924b06affbeb4a2b11faf2bd7df9834f337da04bf7608942761a. 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/GBKQU2353653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c6e048548cbdb5d1e02dbb5b9ca27adef83ef57ffcd56934d96f38c7d979f0. 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/GBKQU2353654.