Spijk may refer to several villages in the Netherlands: Spijk, Groningen, in the municipality of Eemsdelta, Groningen Spijk, North Brabant, in the municipality of Altena, North Brabant Spijk, West
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 0xa5508ffea6426ee1d4b2d6e8193d8a4c6df1456bee91cd0bbfc57e169cb45417. 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/5a3d0b34-afdc-4a46-9166-f89c413c468a.json and https://artists.proofprofile.net/proofs/artist/5a3d0b34-afdc-4a46-9166-f89c413c468a.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 0xfbd0ae17c2af241255a4710d6390e67ab4f1627afb651118ceba59917d6e312a. 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/NLX3Y2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b07570d89fea967a8b862cae9b397433991777b5c225cb570f4d54fad0c76fc. 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/QZTV32466956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049bb29b915a16e27b45e54ac6a0d2baad23b0dfe048a996536f424a3ad69c86. 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/BE8LH2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c113cf47e15b99cf6266451bfe82261ed97fefd609bf86007a3760f7b5beb2f. 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/US38Y2407028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3906645f167f5d47b09f2ba220bf8357425b8f7662d9c9855ecd2cfcd6c05a16. 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/SE5BU2472771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da0d33f292709475fa2a06b6185b4f5a972bce4a55767bce73aa46b156ca4af. 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/US38Y2309025.
Drowning (feat. LU) - HYPAUX & Spijk Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8c5e0cafe43d55be251c682dda613ade974bc9457c505b5e9546ba3983b904. 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/NLX3Y2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac16542439a093a07c5c7da872fe6e0188e121efeb61856f29a481bf1088d16. 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/ROROT2300930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870096b0fca90a43de3d2092617c4fec8fd24a79d5edf93c69af1bcf5543903f. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/DEXO32235450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e55bfa328f969d2c40b9a82ad3f52c56f7996396672954eb13e124caf080bd. 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/QM4TW2296357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ad4e64ec7768d3216823aeec571a7a579eb67cb8e01a41ec47b88000866123. 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/BE8LH2300087.