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 0x444e7bafee4ed761c87235adb7af54b7027c681e21f781431f93bbbd7846a717. 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/5063cb0b-a148-4141-9060-a2ccd77b9b0f.json and https://artists.proofprofile.net/proofs/artist/5063cb0b-a148-4141-9060-a2ccd77b9b0f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Opwekkingsliederen - "Zingt de Here een nieuw lied", Deel 2
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 0xf17cd87011d5dbb80412f635893cf34212f0e92f16ddf05414647c1b02630f8a. 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/NLG620600495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf081f8706d63af06787487833e3c9df1af95317e4e6484572d9c7a965e783d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG620600496.
Machtige God sterke rots-Jezus leeft in eeuwigheid
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd892a01112ec8edad22d0b660cb949e0f6ca741378758ca860a8197ea7911c. 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/NLG620600497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b4a900a55cde79eab990a27f9e7461347237d5cd292e6afd1dae8672ef2665. 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/NLG620600498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe069236f164d0c67df3d6cb0fb5bce267e17d32d29f724713fe1e77726ced1b1. 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/NLG620600499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6c7a6fb5daca1b11c510d0fe6e0c22740bef225d2fda069eb018cc7e669e75. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG620600500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04339777b49167d66fd210c4183f03419854635ef96d9421fd041cb4cc32501f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG620600501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3700fcb0d7101b35d4a7ada324abed8a03bda4fa26859041af48e523578c127b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/NLG620600502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf807d6a5a58268aaca702f08f278082ae071d3ef22fddbef2849e9f088a835b0. 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/NLG620600503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5812ef09f37fc319dd9b817f75f33384f94190719271cf8dbc46a3aeaa659e5. 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/NLG620600504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc0c1f9b8b4a936f40a1cec296a58c36843fc1a231b811eeac143a78a1b725e. 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/NLG620600505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf649666b2ddef4447a733fc81cfeb1b9dbf1fd9bd690691b7791dff9ef37649f. 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/NLG620600506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83e4c17444841bfe36e36f9e830c673dcd44a900bf7d4ff0870a055dc8f8edb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG620600507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb421c911a329363fc26e7f5559b7ccab61c28ecca78839f22edb10c4a436177e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLG620582770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246189ef290ff66cb554e94f1095dd5717e1810c8458c364942d512d43531e4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLG620582772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf96dc2d6207d929e25e5af19a05a32e914b717894f0b8145b531aa7fcd5a517. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/NLG620582773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bb92668d08633959cd7473548fdf8f9261687925a485eb1bf982a5aa077c17. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLG620582776.
Opwekkingsliederen - "Zingt de Here een nieuw lied", Deel 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc881232e3875beda51f1828e50942d6456d9e0cc2eaa534600e602482db4da69. 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/NLG620588378.
Machtig God sterke rots, Jezus leeft in eeuwigheid - Lied 277 & 71
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5541df04a955b578b4f995215ddf5082090d0b8bbd9cec8d782ad5e9dacb517. 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/NLG620588379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b0f372f1d445ef47cb85ba13d623d966edccae3c4aa0981d79c1fa5b3d94d1. 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/NLG620588380.