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 0xfbd88991a146c50e2e356ec2f2eb9e18cf49b9f1350dcb4bc24e340ce6f7284e. 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/09294f0c-d177-4c8e-8ae1-1acde22dda4f.json and https://artists.proofprofile.net/proofs/artist/09294f0c-d177-4c8e-8ae1-1acde22dda4f.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 0xc64390a36556bab36ec6ccbc9516d5071e92ef9a5aeb7526eff0df416554b29d. 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/QMFMF1512001.
Peter en de Wolf: Peter gaat naar de wei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad4c36db2537e48d3116594f3e969d9fb5f447eb2c16f5669a3e205ba0e90b4. 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/QMFMF1512002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26b9ad87904d537c8328f0a8be3a2aed81e233f5ad4ae6fe233c53471ef73c0. 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/QMFMF1512003.
Peter en de Wolf: De eend en het vogeltje kibbelen en de kat beloert hen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd174150b1d9339e8a6c742214613f7d8acb589d13b867c4b1f918ba8d5efad. 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/QMFMF1512004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093dd6cf0704485418d09eab8767df29c8c0e7cca9b274cebbc31c7f1daf9a75. 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/QMFMF1512005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf6d646776b2d21d271dcd092490aec54f93a85b3bf8d40fbc4e7abecb7638e. 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/QMFMF1512006.
Peter en de Wolf: De eend wordt opgegeten door de wolf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddaaee7190bdcc3357f80e1fadd012d4686bebfb70bf13f23e3485741dcbc4b. 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/QMFMF1512007.
Peter en de Wolf: De wolf aast op de vogel en de kat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fe53bcfe0d60884731c27dac8b7f3732a875dc0b12665e62f34dffdbd2d0b4. 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/QMFMF1512008.
Peter en de Wolf: Peter laat de wolf vangen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754404fac3ceba7094a9f5b8652e69805f19fe72ddaf68bd8401daeca3603e26. 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/QMFMF1512009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176a9e82bc2fce2322cc75da52a4d3a42464f452c8ca719b840111947de08ac0. 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/QMFMF1512010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbb8b60dfe09775713843f1b25adab6a2d0bbb82524ddee949e75e6e33569a0. 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/QMFMF1512011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a41b4af3e71e22bc1976cbc250dc07986b91ddf2670cd6def564222930915c. 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/QMFMF1512012.
Peter en de Wolf: In optocht naar de dierentuin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51eec5674553b455908de3dd81695adb65b4fa1e784d0e143262232c470667a5. 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/QMFMF1512013.
Het Olifantje Babar, FP 129: In het oerwoud is een olifantje geboren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67289610f9ca6da485377eb93ae1b039eea56ef78e17fd3790ee7aa1708b4a85. 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/QMFMF1512015.
Het Olifantje Babar, FP 129: Babar schept met een schelp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd32402086b089f4d52d7cecc2e29977575cf75d4c73bf1632a72d3326938df. 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/QMFMF1512016.
Het Olifantje Babar, FP 129: Een ritje op moeders rug
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf466fd9e38d488f00457513b4182cf15c3d169f7238b25eb51bd147049d575f7. 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/QMFMF1512017.
Het Olifantje Babar, FP 129: Een gemene jager richt op hen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77244ecb49f47df103cb18572f8a10d979814fa5b392a0b763816f443d476af3. 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/QMFMF1512018.
Het Olifantje Babar, FP 129: Babar vlucht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba46988a8a618b27c3981eb9270fb020b77290bf5bd8ad38463c3ae9cc1f3076. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/QMFMF1512019.
Het Olifantje Babar, FP 129: Babar mag bij een oude vrouw wonen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96333a504c164970ae3be6e7092f954a2a05e0c4ed0e22def5bb146adb8cb3d. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QMFMF1512020.
Het Olifantje Babar, FP 129: Toch is Babar niet echt gelukkig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a33ab7007d439226ae206e82cea4ed0158198fa25c40267f75e622fdd2a7254. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMFMF1512022.
Het Olifantje Babar, FP 129: Twee jaren gaan voorbij
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa84ff44dde80adb969d4f945f82b4921ade8bc8fd595d6d4de5e274cee9fd6. 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/QMFMF1512023.
Het Olifantje Babar, FP 129: In de taartjeswinkel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fed73f6802afede5ec9d36221caa3f48084020ebad43d6b42997879342460dc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMFMF1512024.
Het Olifantje Babar, FP 129: De olifanten zijn op zoek naar Amur en Celestien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bf6cb5c7123ca1b792398f8dface56c7a03b1e399fb091100cd15fbeb04737. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QMFMF1512025.
Het Olifantje Babar, FP 129: De oude vrouw is verdrietig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258832ca37ddc39251cfd59fd7bd7711931afb422751d10b99d73b2efccc473f. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QMFMF1512028.
Het Olifantje Babar, FP 129: De olifanten gaan terug naar het Oerwoud
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6475298c032039c476c465a225af2f326ab800c037d432db1fc637f17a0cc1b. 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/QMFMF1512029.
Het Olifantje Babar, FP 129: De koning der olifanten sterft
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e9d7cf4eb6378f5fadcd3225093b970ef5e70a7a3687931cd00cb413a0b136. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QMFMF1512030.
Het Olifantje Babar, FP 129: Babar wordt koning en Celestien zijn koningin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc0dfce7a98f21e7a2997cdc277066bd60ca95e0d92f79aa27ce82059bf6bed. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMFMF1512031.
Het Olifantje Babar, FP 129: Babar gaat trouwen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84a21e3d05bfd68d70813b9ca468803b45deaf998f5a419faa2442cfd8c22e1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QMFMF1512032.
Het Olifantje Babar, FP 129: De eerste gasten komen aan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcd3907a128e42bf20975539bda90102f7692a56be04d76097a55221a0b7ae9. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMFMF1512033.
Het Olifantje Babar, FP 129: De bruiloft van Babar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b4e1b80dc7d405daadd72edf515b19ac75272e152ee8014dd4cccebf2810d9. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMFMF1512034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b779482054d2ffa6b9e2b08117da6121cb9e85a6028089132721b5543b1026. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMFMF1512035.
Het Olifantje Babar, FP 129: Het feest is voorbij
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1948d67d1b6696beaf5bda408d3ca0aa1707e71bfc95115c791458a0bcb6cd. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QMFMF1512036.