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 0xce5fa58da2309d2b7649b3152583bda139dc824c20b9ada1a51b51349dd44693. 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/dddb6bbe-ff15-4197-9bb3-1ece5c9190d7.json and https://artists.proofprofile.net/proofs/artist/dddb6bbe-ff15-4197-9bb3-1ece5c9190d7.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 0xe1d2672d78e36bd076b11d8bf139c8bcd74190e92cd165bb56675c3dceef2d28. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USAFM0700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9c26d62aada273c65e9ccef2d11af05e4c7f8aa4f7b26e174daa210f4170a2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USAFM0700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32ef777d98da5156f73dcb9499a22aaf6b4be432fff7ee821ae7aafde5ff333. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USAFM0700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f48a0e9c117e5c8d63056ea321ef3e062d272f75574efdbc2f8938a3b6a0486. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USAFM0700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796cb86871818657f37382be334baab1c574dcaad9bfe43ab3b637ffd4ae95b0. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USAFM0700093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c25f3289bd50e49d3124fbdcfac2dabb0d5bb17463ef1e20bac662f638f16c2. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/USAFM0700094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f79a0d38846e70e52c69f6445cd1cb9bcd7b8bf70cfc07782686af88cda0793. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USAFM0700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50624bf2d3a9e5ae181caeb4e421d70e1b795aada42535a612852bdba48fd1b7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USAFM0700099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0e8f05eb5a9e76cccddf765badbfc5c4e040c40d32dc8bf3c7e60cd4bd52ed. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USAFM0700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2168e6a7e0f6b43b5040a08ac1e86dd89c2b5929ff3bda2c4096849465314a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USAFM0700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde415cfcb7e5dfd87021d0d304f6f8e0709f451a9d4ecb6e070b5a8555cdd627. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USAFM0700110.
I'm Getting Sentimental Over You (Rerecorded)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463e306123d084ea6bd30cc4218b36ee2e18199b1b0120197cbbb3daa97148bf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USAFM0700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda896e73090ea9931421a946a9d6882d2894383f72bb68f733e2b0e156392d0d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USAFM0700124.
12 x Das Beste: Big Bands (Re-Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e77dce9cb7c21110e9934608afc04a6a933a711ee1b5a0bceac1085e81f5b08. 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/USA560846865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0341435a235aa249056fb36ba41ea180697d4ee5453fe5810c2278315ca3b2ac. 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/USA560846868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c042e3b7355d2f324f604b10cd6f3be8433dd50fa7df26e2b2337e8480efaec. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USA560846870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7967d25eaffe3483d1dc4864b4ceccf36f6d9d4d81d3841933650fb07011cdad. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USA560846879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597d19ac8bf5b3b4d6ac44cf84b23ba4bfd7a5960d70f31ddaee959dbf420684. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USA560846880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398e3a1fe21e7988f73df9fb2e72e063202a60db4b3db752f36c0e1e729249e0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA560846883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d988c95a3be3c73113d5e8adee3f5b36aa9bf35650cd3c2bc5ec942859ac25. Chain 2 (Bitcoin): anchored in block 957665 (2026-07-12T06:13:49Z), 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/USA560846923.