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 0x14431e2aabc6f4c09b589103f9be699fd89fb4a259923d6e5672fd4df59af1e9. 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/7b3f579d-24be-40c0-a254-962ea55535a1.json and https://artists.proofprofile.net/proofs/artist/7b3f579d-24be-40c0-a254-962ea55535a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ezio's Family (From "Assassin's Creed II")
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 0x3e17c76f371b8e42728a14631209b335e210fe7347018660c4983db91c54dc3e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZGWW1959097.
Fear Not This Night (From "Guild Wars 2")
Toss A Coin To Your Witcher (From "The Witcher Series")
Where The Wild Roses Grow (Cover Version)
Where The Wind May Blow (From "The Amazing American Circus")
Enchanters (From "Dragon Age: Inquisition") [Cover version]
Enchanters (From "Dragon Age: Inquisition") - Cover Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de96af3ee3e480b3083771201f2b3bb3e11f8973e8864ee60b1855567d4dc5a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZGWX2242446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050ca0e9d7b25e156eea32872628d416f4b72cdd7ce6a070f07a95ad49e82abe. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZPJ32178733.
The Sword Of Destiny (From "The Witcher III: Wild Hunt") [Metal Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f54b7f6fd6a0f76f5ae05c6c786de28782e6ee295a3fc8bbbc3e22105082c4f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE6XY2219220.
Sleeping In The Cold Below (From "Warframe") [Cover]
Mirren ("Millennium Tour" Open Test Theme Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe828c2dfe125cc745d882c8c4edd1942268f875e8851643ac119494a0c4b7ad8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH6542149302.
Little Drummer Boy (Symphonic Metal Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8145caa1883ce9dd33e10fece1c5b806711592ea7a78e4381b524e6aba49d258. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USCGH2100314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b807ce2bba2742da96e0e3be0d3aa7cd9fea81a289559dd24025d94051e86c9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PT3GH1600002.