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 0xb7bf08a200cca423a9a160507439a51e4b644c770b586a8cb02c00b985effd3a. 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/194855d0-fc02-4a12-a934-a3dd56897dbb.json and https://artists.proofprofile.net/proofs/artist/194855d0-fc02-4a12-a934-a3dd56897dbb.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 0xc7be8c3a0afee93885b82424e65b323b9ff24cdd05061d15893bbda31b91bf1e. 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/BEIW12100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f752c179eebca08d2b5d9888082e04c91df72729d1aa13fc765c8b89af8f4aa. 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/QZFPL2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83a842b7c5856964ff35c0857e989f5fb6f29ebfb88151d6c79c62a9dc5fd2f. 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/QZFPL2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc716936259ce7a525ffaab5be1f65b904bb38e58a72036e35e089826add65f0f. 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/QZFPL2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb4771a00c16d7cea7aec333d908d00c5960f59429eecb8851417644b045607. 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/QZFPL2000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d97d7e2b979e9c117e16da6ab447871ad50196110c742c3f385f2fe4024cc0. 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/QZFPL2000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2dbc6df1058b0ea5b0bc8d89220c9a340d2925ef185db010523c4192b92000. 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/QZFPL2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1948057ac4da7c4fc545958a021c75b7adf0707e2fe4b2cc92c83629fcb5229. 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/GB28K1200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd1e09b2ef08c595556d081a58514fcff5ad194eaa4e7775c57954ccbe79408. 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/USUS11700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba0cfeb8d03f502cbdcc9f0ddac42680d20a3008aeb4e15c029c0f96716bf28. 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/USUS11203337.
Home Alone (On the Night Before Christmas) [Deluxe Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1db8ba449610080eb8f903b9ae4749cac2be219ec73a69e5d6e470c6d161bdd. 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/BEIW12000466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a194753683e8bb16b5e6adf5585d2d8aaae7cf73e493abe74751c61fcab88cc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CA6D21900325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e250cb756602d063caaddbfc7cf8f397f25df064d822ab064ed12866ac5caa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BEIW12000526.
Do They Know It's Christmas - Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acaf0bf0d052bad64880f3cb8a8eb53573eb073834309eb63f712328c97380b. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/BEIW12000467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9021916f31eee98e06a942d7a3caa0ae13b0ed0b154974dbb1f75b5ef179edf8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CA6D21600280.
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