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 0xfd4c0ca5dcc8c668a0abac4573fd15d73ad3c5309fcc487616c0d55d7d6e0d59. 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/62fd9b8e-7fce-48ba-8b55-eaa56c17d229.json and https://artists.proofprofile.net/proofs/artist/62fd9b8e-7fce-48ba-8b55-eaa56c17d229.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 0x30df239fca30ce36622c643d935b0a633a4aa6320e66e56841ffbb508fa8b453. 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/NLW6E2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655eff8b5f1211748f5836835412d94d7510d971692aca04877ec11052461b11. 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/NLUM70800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf109de3761c601f024fa81799af09785eb09603c68974974b36553f186a5869. 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/NLH271600004.
A Taste Of BLØF (Arr. by Ton van Grevenbroek)
New Compositions For Concert Band 75: Las Vegas Strip
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedc0352902b9704cb8174942e498f64ba5c15fb51828bc49f0a79a239a1321f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFMF2023181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dab7a5b7ec070f91ba0fbd6807b5c26d04c11224096729ef6075d114cdfc93a. 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/NLZ291400516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dab7a5b7ec070f91ba0fbd6807b5c26d04c11224096729ef6075d114cdfc93a. 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/NLZ291400516.
Blijf Nog Even Hier (feat. Paskal Jakobsen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8d376cbcabb0bcbc9b71aadd056c734c516d36eca6f8de79fec285a93448e4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL3FN2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30df239fca30ce36622c643d935b0a633a4aa6320e66e56841ffbb508fa8b453. 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/NLW6E2000003.