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 0x30123728111373eda807eb9d7b89c72393ff5ae517cb6fafe2cf32206297cc6f. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/121bd2f2-a366-43b7-969c-4d2120f1109e.json and https://artists.proofprofile.net/proofs/artist/121bd2f2-a366-43b7-969c-4d2120f1109e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kom in mijn hart, Heer Jezus - Instrumental
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 0x0ecd29cbf5a3c5d05c866dd24c9514627ec6a4497eb86ad6501ef43bdd2c563e. 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/NLG620616581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984e2e71585c2ae78d004c3ff44585b79e0c49e4390dd6547ff72e6bc4ff9c25. 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/NLG620616582.
Neem mijn leven laat het Heer - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cca386329a29166e9ece66d004d010f03582f72b4f0055ef626b75f8f5d2b82. 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/NLG620616583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed479db42cdb3704c4a50f7a6eb39c78f87288b45217f73a19e3783bc614548. 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/NLG620616584.
Liefde was onuitputtelijk - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908091599e1c0ece5a06cebb3c858475fbaf40cb30ad20137e7b8be1fdb55371. 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/NLG620616589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f768be4ddc625f213be46e9abfbcdc04d295ee6a75db4018579691165195f1. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NLG620616585.
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
Leid mij Heer, o machtige Heiland - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1fbec2ce62eb7d196988c95e39543f281f4439b04ce36942099d4cae2a2c82. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLG620616586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1367d34796073b5ea94d1bf1b96d1320b73f349aedbabdf748ba4ed17ead3b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLG620616587.
Vaste Rots van mijn behoud - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018d640876d22d82dadf41e336411986458023af8224f07e4c06615d3e855517. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NLG620616588.
Heer ik hoor van rijke zegen - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431491d440523f2e96f0dc5300a5a2a1884357283c157a4711288a988e40596e. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/NLG620616590.
Neem Heer mijn beide handen - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710ae34eb9df23ebe681b790814faf898d43d3a835b7234676006a15231991f5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLG620616591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70285ead64fdf4f84b60cf568dfd6c800a62ce142a722bf02ed754f7a5b4b989. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NLG620616592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fa345ccb6af595f9f671097a1a6f11ed3ddb05c2eb9410b16c2d55e5d93cfe. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLG620616593.
Zie ons wachten aan de stromen - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ee509fe917ef6e1d2e8402e744a629bdc20b4e1a53d8995705fe14862efcd9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLG620616594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340d326a6c0dfc2543d4e8d3323c2e95a038a3f3dc7a7b3dd62b2b4da57f0144. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLG620616595.
Voorwaarts christenstrijders - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9225edbb17a31bdb3e9c3c613ea018a704521e46a6dd8d3295aa78da26740953. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLG620616596.
Groot is uw trouw, o Heer - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3069f339423b0a46540d070698d255062e16a912c10e81986457adb4443ead. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLG620616598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546a38d92190f303686f06831efd78e4bedf277b837ccb0ba56b5301b9811e61. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/NLG620616599.