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 0x271983d7b6449924dffca85097eff073f2eca8a6ca7ab2c58df6a1431579664c. 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/de4af946-fa0a-46b5-bb86-13de2df9f922.json and https://artists.proofprofile.net/proofs/artist/de4af946-fa0a-46b5-bb86-13de2df9f922.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 0x127542c49d68a20b0b7ed12e7cbdd456930bbd8ca993adbded3dfca99b4e3bf0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCACR1606742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4edd68c02941c4d5b5547a91b8bef1c67190c481782c8b780f1c85c63edf260. 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/TCACR1606737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4fc43988e5d151bbbba8d8c8093bd098d438318de239321550ea8c6951b345. 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/TCACZ1714350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680286fdf44d1fdbcbf15a2b69c05f972c0dcd334be191d4049c9db35d16b001. 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/TCACZ1714349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f79c6f6021a5275426f2511586013b7e17ddc444d78a5c1a5f936088e3fe842. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCACR1606730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c1dfaccc5fb503134a890ea60c8ea7910752956c2f4bbd79fa925b892236d7. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/TCACQ1674769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267a07142fc206e4861012239a10d6eaa7d35a7b56243e9bc0e791acf692c9cf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAFB2041164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc9cbd2779d4d626c0e1310ef8fee6b5bd2bcf1ebabdf7a640a1748989d2528. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFB2041180.
Hell on Me Casey Daniels and the Dead Angels
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb70a6a1b3689e353a69b58124b63be405111a80ba4db78fc6298c7fa79d588. 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/TCAHP2348884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50169ed24184f55780bd48f5983242cb15bf8ec7919f36f2e48d1f5fb5c3b03b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAHF2353190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8205ba0211e09b81d72b7c395e1016741b3b72e5cf7cb260423d9bbde0ba7358. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAGP2288852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8f6cee95b0f9ba4430838ca07b52896e381947186c608ea990c381c51e5569. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/TCACZ1714340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5b69e8791ab991b09b8df11a12fca1e8b6ce02403e04a112b0c8f58c48a509. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/TCAHK2327818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9476385b679b044a668de3729f396d0e6441ebae2cad9eb6b1fcfe413fbe022f. 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/TCAIO2430163.