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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9830bad3c276f1cc3da719f5023e704beff04cc3f8e68315530a089bb8dfcd1a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be171029-1e68-4b42-ab47-73ef8868afa5.json and https://artists.proofprofile.net/proofs/artist/be171029-1e68-4b42-ab47-73ef8868afa5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a121b415671087c13452edb5dd74e5206954f0f1221f314e24d6227ef72aa25. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:40Z), 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/ATX550701303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1a20bbc72062eeac338749339dad34f7993c991f1ebec7a141b6b54fa3f454. 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/ATX550701304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7815bae631264164dd7ac3bfd6b1c6a0a4e410e469a52054a1c9863f9bb56dc7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ATX550701316.
Ihr Hirten erwacht Weihnachtslieder Kirchenchor Apetlon Josef Pitzl
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c18c9f0938d3d02fbe060bfa4238b8ad48167aa4bd5ed1f5974b07629192a87. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ATX550901710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5d3b9cc6e1ce319cb5b7f89f3e9b017c7aeb02a617f1a1483c159f8e984b06. 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/ATX550901715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a511f08da67d0abb52bbc13f8653f1288fccfbe30c6c80217e19304e8d6b60. 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/ATX551202102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b333f27d676c947881d1e7691692ef48c1d96f1614c9e11293cefa557c33579. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:05:26Z), 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/ATX551202103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83127e62a4ea6c83dbe7efdd58c153ae20272944f266974a077276fbe4aa841c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:20:31Z), 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/ATX551202105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d63f224fd7a7a7bdef392f7b04819c24651ca26c0123f37bc1b86f184e3c39f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:48:37Z), 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/ATX551202109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdcc6ac1f3e8d7c23292ddc8c9c42fff72383c22d9d0de5cbd3e2db80f131f7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ATX551402202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c197cd972be9ac70f51f07b71ed4679a41e4ca0b4ce257458ec139840ab3f5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ATX551402203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02360c611b4007c7c9e027dc6537af3b99933144632c7bd40ace948a0869592a. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/ATX551402204.