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 0xc03117e4451e2da10f7f33fb5b7c68e8036be9d7779e54e5e55736b39f22b6ab. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef6984d9-883d-4248-a8dd-cf7d1494af08.json and https://artists.proofprofile.net/proofs/artist/ef6984d9-883d-4248-a8dd-cf7d1494af08.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 0x7bd824b2a1dc3a879cee9d7f3a7522d90eabb244c7a435b28ea95d26e575e2b2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLUM71801211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fab13bc30cabe9abca544637b665619fce0771b642e3266b2cd683a836741e3. 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/PL41A2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dc5e5d1b4a4e265d7d72b3ef2b76c883a073cf13f039b8f1303f1d4ffd564a. 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/PLV402201807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e2f1e7b7f05ef3b76525201d35ec02b76c50e3a5f1f5c46202048e3cb847fa. 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/PLV402201808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe961e00e04d2d374eb0ae72177b00790e788235d8b00d027b1d740ef038f41a7. 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/PLV402201809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306437a6592bb51aec5cb21151428a4ff507d87218d423ccf5157d5439e62aef. 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/PLV402201810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51a637ed5d81fc75e8c733943834a3f146ff8c114ba9566cb3a5c635cc21967. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLV402201811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5216b04a6f57f0fd3fdf25c777a9a81a36cfd1bfaff117002e180e3fe718ecdb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLV402201812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d87632c24d5c10a03b059e68fce2510af9a475ec04c7740d3eb2d0c20d4393b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLV402201813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b669ea6401f3dbdbf51fa0c0389993d042eac5add577a430879fe918b278f74. 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/PLV402201814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb243de7f2355209614b9dd73d4b20fe127c024bf2fbaec53c65b3c728c99eb. 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/PLV402201452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126ef9bd0b1cb260bd2a291041bde921cdd9eee7c3c010e09b0baa65e17233cd. 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/PLV402201431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70599f8d39d0f0adcb91f59a2288a7f39aebc581537e8047c36f945051a2aa2. 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/PLV192200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70599f8d39d0f0adcb91f59a2288a7f39aebc581537e8047c36f945051a2aa2. 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/PLV192200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce3916aa8f03e569cce136613f6c84ff83187e5bb7307ab2076ba0934a53005. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLV402301753.