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 0xa007b537a2ea26e62d3f4a773515c42ee849b19541fe63325a053dfa743f31c9. 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/585b92dc-1fba-4c81-a28c-2db879b48558.json and https://artists.proofprofile.net/proofs/artist/585b92dc-1fba-4c81-a28c-2db879b48558.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 0xe69014797114e0b08cd99dbc858d22b0f59efb97680946e56de1c59f671f32a6. 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/BEY881000495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729d7b41f8d8d3c3342fc0cfa0abffdee5655b7f0f51de4ae6586d59a13849c4. 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/BEY880600222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89030d4c2e8f3427e1024f9abc2543535cc6dceae71833c862f11ced82a8527b. 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/BEY881600629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adc88756398334b1e4fab24974d9ffcb0676ccf18e782bd54d469ac9686abad. 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/BEY881600630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c187aedfc8c1f8146914d2a6afaf57c22944912567177ec330b0dbc0468ff82. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BEY880400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b88a94ddd20bfbdbe130c1d060740acf8f0162938ebf63791614716c485805. 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/BEY881200606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0289637e818602a9b5304347b66af9cfaf3c61574e9eaeeb72dccd557d959c0. 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/BEY880600234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c0cbfe55c71a8cf0b2694fe5572daf9ae4d320874e4cfb4f7e545bfd4ecca7. 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/DK5C50123172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39215d05c2d6154357f1c3cab8f631b5cadf2505002058f1b61d40bda62e5944. 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/DK5C50123173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95759f7d4b93d684effecb5a25f519077209f878ad331fc2ea90e03693f2b836. 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/DK5C50123176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ddb714fb801c0af28f595072fbad3715109b1ab3350d5156caff8c03f34fd8. 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/DK5C50123178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc064f219e298fef14aa6b0aadbe01ce5c1e14d7f79fb939d86629e1c8edeea4a. 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/DK5C50123180.
Als Ik Aan Jou Denk (Maar In de Verte...)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf996c660dcbae491cb79e18832c96d1e379129356f5108509967779215c92a81. 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/DK5C50123181.
The Gold Series - Afwachtend En Oplettend
Er Staren Steeds Meer Mensen Naar De Hemel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0836d698c3b0c23d09ec5998063ffcfdea71289f80bd8846face8d201b77f7bd. 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/NLAX70929543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68659d086647a5a6f76156269d0e32edd05f7d2b64becacf06b8a6d94a06edea. 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/NLAX70929546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d8e4bb084a733d6b437d7f72abf69d8f6d8d1fa316ac29b4cce2d0a58cb84b. 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/NLAX70929547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc7af37f2e48850cabd883ff349e957495fe167ea7e5e5f6e1102b851853ab2. 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/NLAX70929549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c2b6ff6ec2f4769a0247a1da6baafa58cfd176f02fa0e8683ce3ab51d75930. 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/NLAX70929554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2179daba498ff2519e83b63f76e9d19baac54fe9c63118b72d55288c746305. 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/DK5C50131270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff2eebeff1ae17c76201d67e874ae67b0ed404420bc4a8f996b1b19f277db06. 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/DK5C50131280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f821adea934a8366c8bd882780497503e52aae149d326195d2a8c21078679f6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:33:17Z), 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/DK5C50131281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0ebb2d7724f0c673a236173039cff90e7a01f66838e8af4b47bc09c4d6c87b. 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/DK5C50131282.
En Soms Waait Er Zoiets Als Vrede Door Mijn Hart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed74253c81ef5b8827fdfe090db1269fac09f7c20459bba0f5caa0481c4b182f. 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/NLE320800636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c4ea3935440b2872e03f1e9778ecba20c612498bf6ea3f65be5566f4d63267. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NLE320800615.