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 0x29da0448b623e0df12693ea6b5a62761ae7bba565b5547eacaa7a785322343dc. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a223e62d-ff55-4618-b26a-8631fb0b2662.json and https://artists.proofprofile.net/proofs/artist/a223e62d-ff55-4618-b26a-8631fb0b2662.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
21 contes rares de Hans Christian Andersen
Chapter 1 & Chapter 2 - Prinsessan á bauninni
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 0x5267a886828f6f3a6241939a3522eb9014948bb92489040747d9615d79def1a7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEWM40095630.
Het herderinnetje en de schoorsteenveger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf850b8363d2d55c7fe0038ef2eb88f380126f592d73ca240fb8567b6ea4f2c50. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:41:41Z), 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/DEXQ71212171.
Chapter 1 & Chapter 2.1 - Nýju fötin keisarans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3825b4e8fcc7f6bde344c3271d9d1ff726e51791de7cbbce3f8de77604061186. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:01:31Z), 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/DEXQ71211989.
Chapter 5.2 & Chapter 6 & Chapter 7 - Nýju fötin keisarans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e2dd63b9f0d810d1d81ffa0261c9eaa8ff7c9e3a5be55f49e13c6b38d298cb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEXQ71211992.
The Hans Christian Andersen Treasury: Bedtime Fairytales
Ruma Ankanpoikanen – Elävöitetty äänikirja
Norske Perspektiver - Norwegian Perspectives
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e91c5ba0e2bb7d8b0f171317b0e9434421bd06b419cf99cdc7e70807cfb84d. 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/NOX9X3611017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e6d45fe81cb8919e212c59298ac41028221c5b856025fb1b40d5a840ac6886. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DKGQ11800402.
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