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 0xb9dddc1be2fdf92c288025cbf031aaf6896fc9ac7cef8c2d0a3bdcc420ceea10. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63ff7350-2053-41cf-9450-2e9386e419d6.json and https://artists.proofprofile.net/proofs/artist/63ff7350-2053-41cf-9450-2e9386e419d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piosenki dla Najmłodszych - Jedzie Pociąg z Daleka
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 0x90563b820ed70d1591537e395340858c113b26d09242680d6d28e5809d5b5b92. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/PLO381502454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a179c5d850e48a9d616698300f8245d32db103a955e96a391e6967a6dc2098. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/PLO381502461.
Piosenki dla Dzieci - Cztery Zielone Słonie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076cd2f4543f7c42afcd83b0c8a9ba6dd02b712b519948575ea0a29956f10451. 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/PLO381502483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47659a6f3d3990338995c1c196fab3213a7093bf26f6aa04c1d851c02f4563d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLO381502490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a61afe4a4a3d6121c2d0f0b2a2685e64a40d9cb18fdb5d2a4e86765c2f31833. 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/PLO381502493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e6e8adb404078ae21fa3f1da59f841df3ca908a9b561546f49a6b7df962de4. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:50:53Z), 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/PLO381502473.
Jedyneczki i Dwójeczki - Dla Najmłodszych Pioseneczki Vol.1
Piosenki dla Najmłodszych - Jadą Jadą Misie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1558d9c45e06489990f9b3a5e31dc23159368e47f88cbf7b3a27af9a22e9e764. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLO381502437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c7cc70ef1848783e3ac5155bdabc7cf907aa21a85222b8b00ace19b0e7f2e2. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:25:54Z), 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/PLO381502440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdc66280c8a8884b689a31acf05e8060b93482626ce0d644844d95bfe9718f3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLO381502450.
Jedyneczki i Dwójeczki - Dla Najmłodszych Pioseneczki vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2f56cd0c573c43b82b1a12ebc6fe09c18941cffbe8be894b87d73e6eee07ff. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/PLO381502538.
Jedyneczki i Dwójeczki - Dla Najmłodszych Pioseneczki vol.3
Jedyneczki i Dwójeczki - Dla Najmłodszych Pioseneczki Vol.5