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 0xd33456b513721ca8f66976ba60a0e77d7601f1a98792f6a329c1bab2c5b34cf9. 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/1707a9e0-3580-460e-aea4-1634dcf3ac63.json and https://artists.proofprofile.net/proofs/artist/1707a9e0-3580-460e-aea4-1634dcf3ac63.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 0x79ab2f2689316eeb1c331cc5042610ffd6b6992d1292d348279cf39bc76d09fa. 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/AUFF02200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d493db39d58a6e826a9d991ee45dabc866e3fe32779947b5a48bc372b84e1d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:36Z), 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/AUFF02200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfa2ededc95b220b81dea698c0125bb0b659bce8667e1e864d74291f4b9b274. 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/AUFF02200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e9109f03c1f9b2a010edf60093793c9fd2cfee2753a09ef402fd3d04cfda96. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/AUFF02200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe242c1c3ca335bf7baa151b8d035308418f85667fcf7fcf577a322d0525f546a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/AUFF02200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3681c13a60fd69d99901b83a16f46ed87b23238a6e65b031afb6d5b6c5d1f688. 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/AUFF02200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fcd0871c72f5841e2c9ad6760572f0f98945c7a8c889042a9b2b4b079cc100. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/AUFF02200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49881bf387f21a5ec59d905b6110a338e28ea5d95090c63474ee3701efa17d3. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USA2P2308592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfbdf9efd6ccbe445869b963d0d66e26c449e9fa9df7ee375ea43d9b5427165. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AUFF02300374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e3e2827f3c6cd3140b3634d8245e968456ec3d9da25f5e10d7a29de767ca3d. 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/AUFF02300380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe36a474d26189dbc82cb98d8434cf55f5c98af955c50cb793fe733420085483. 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/AUFF02300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593b23b0514d74f90a9dd99ee453359a6ed02f2cb60046b89de33a54da15f316. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/AUFF02300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f1d42cf4e092db31235769bb0d34c84f66d690719b34cbf6b0e33cdbaf0480. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:17:01Z), 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/AUFF02300386.
Snowdrop (From The Motion Picture “Den Grænseløse”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d992731abe6036befce453f8fc35c2cbe3b9348d5392fabf75adc8e58db33a3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AUFF02400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9676e5cbe90164b8257deb18cec14c97a0ec5569194789bcdceca6fa10ae212f. 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/DKPF52300608.