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 0x2233d083a9b5552f6b7fb745dca12a77e1171c27cbc5f5c901ad8c5c8d435b58. 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/96121764-8a7e-4944-8737-0d6015d5a36f.json and https://artists.proofprofile.net/proofs/artist/96121764-8a7e-4944-8737-0d6015d5a36f.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 0x9cbecd35aebb8cbb45bcd7231645fa4bc807224ad52ff8824db2bcbf7048052e. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/NLAX70923330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353ea2153ebf599b1e86b8a07794e2404d5ee7feae87e953a323b9dc89808214. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/NLAX70923340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65417816d3b847a95e3e670f4ec4a01640ee5a635a8c35820ae5b1f45c19c49b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/NLD320700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4305ef1533ce08d2ca3d9dd9b736ef75d3267dcbbb02020bf3f33bf53bebe61. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLA241007653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eae744d08051b0c4839fcc412030dccab4e8b178dfab16a8d4af3a9e331df1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLA241007871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4c1eaa59fb6f330f8a1dc19c29cdc2ffca5e3d6bc09e9b7c36014ab6136033. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLA241108199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8786afb9f2ae62fd1c81d1de20c54b3b66dd914053fecdb8f263ebdbb376ed1. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/NLA241108200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ba91ff97290fbc6849c81a2f9eaec3f14b0004d00b07b662f90071d8cb5656. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLA241208450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2200e9894513600516dc118ff9d31873c25e715c4e8c3daa911b229fc9327032. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLUR61300101.
Ik zou het willen schreeuwen van de toren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caece86fa04ef447d13fbf5be241fe8543c53f00ba6ef2aa72be5b8826285dd. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T16:00:28Z), 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/NLW2R1711814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3378aa5f8e8ac365a71c8259672e6e6790d08b4fa026635e99d665d428a5cf. 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/NLW2R1711815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b3ddcd5193e3cc618966f53add654c04d71493a61d7b87caaaf99a1328ccd5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NLUR61400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c12942a45004c88779841cbe2b46a6183272425ed0fcf4d5977ef321abdc03. 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/NLH2Z1500003.
Feestknallers Top 50 (Grootste Party & Feesthits Aller Tijden)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606d1007279cba9fb93bfa22051abc3a5cfc5ce1f0b127139fbe2b5666e8bc72. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLF290800444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606d1007279cba9fb93bfa22051abc3a5cfc5ce1f0b127139fbe2b5666e8bc72. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NLF290800444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b15e9ce597e581ae7a1f1f80bd75fad09bca1c6726202d4a11caff525662cc4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLUM70600643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72d561d3ee76d4067b81a1d9a42c5a5ca6b878e83bd22f44540ef4f5090ab8b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLSU31100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4366d67cf99ce91222738f65ab2cc1ecbed64c1791f68e2e4b938ed77376a9b2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLSU31100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea1db5f1065cbfb03907f9c5ca3c9d6e32bc25f49ba59494c489afb4bd7af6c. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/NLSU31100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28cd89c777584cc7bb991c9d76b79542d65434218e3ff5b9b096ed21d9a3fb1. 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/NLSU31100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56db21ae28408daa7491f2c9b03196fd0b7a6041f1bc8f01a70269a435ae43b6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLSU31100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7179404c1b1afc26274304c793da8d7cbe8bfe6f53a410a0e9e0502607b019e5. 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/NLSU31100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f9ebee3a3952f3ee49a1642eee0d59d317267a5748f59fad3b49a8ae211c34. 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/NLE871411401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f9ebee3a3952f3ee49a1642eee0d59d317267a5748f59fad3b49a8ae211c34. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLE871411401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010ecfa4501b59df6ea57358e5bb25230a6dbc41c0993a889c25ef030647fe06. 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/NLA270700460.