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 0x675f7999ed2c8594ac2551e41ec7c4950c56549be535f577ebca7ef09daad858. 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/b82de6f3-7896-41fb-8452-c8078007df0b.json and https://artists.proofprofile.net/proofs/artist/b82de6f3-7896-41fb-8452-c8078007df0b.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 0xa4dd603ff939a365d2aad622176493bc031daa7cf0cdacff8552c6c8a2a6292a. 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/PLF241502026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74060895f5a5ab05165794c9f3f899795521524b51420762a00bf6514c0cc2e. 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/PLF241502028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd6c3c77fc28a1199d3f8f1a7b96253a32f9a85369d621644d50c612844d97b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/PLF241502030.
Nie powiem Ci jak (feat. Polska Wersja, Saful)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e6c1bf0bb549cb26ceeddff3b49928c28af63e51fecece614adf8e6683062b. 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/PLF241502032.
Najwyższa wartość (feat. Sowa, Kacper, Kali, Jongmen, Michrus, Dawidzior)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04e27129aa58decaf58855bb0360c4b53c901216058b38b60f44e05f6d612e9. 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/PLF241502034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a1bcb0c61356494efe03d649d300c30fcc3f1a3dd884bc5d94f10ba6e1d277. 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/PLF241502009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61719b0ecf01603e6019ac7557812394cad02327623b4c9af31da93ad37261b. 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/PLF241502035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae95239c220f87353a9f16fa51ab427787d1a37fe2dcfebb3287044430430c7. 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/PLF241502036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd995bb9056798a84e9c771a8a997dce6e4cfbb172997acdc11629f486ccb36. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:21Z), 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/PLF241704246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220f74b288734b5985bec62ac7fec457f5c7d97895e5cff5de2c4bba3cb4c15b. 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/PLF241704093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9df1c55eb6286c872f9fa10bfbb6ecc25357e728b0e519e852584bda01a0128. 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/PLF241704247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab600ef2a1df0eac32bc8ba97d82ae32b55d71dbbabc179eb9c131ce78e8875. 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/PLF241704249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b7a1f009ace7bbe0fed98ac9270ab3ed3a11faa179c1c85307e139c3a2b45c. 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/PLF241704251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b8115d7ecf14fd78e288f7307c7eea3169284d7809b478752e66fcdfcc64b2. 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/PLF241704219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c4fa4bc354503ac3486bb2222b4847231e818534e34712c6e37313d140332e. 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/PLF241704256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf519bc260302ddf1eec3b026896f088b625e339ed2de08469151291db2b5155f. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/PLC061806640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867f6445c163fa86ed50bdc1e012ff4633591a539c145f1415a4f3cf0d581478. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PLC061806647.
Słowa co pomogą Ci iść dalej (feat. Małach, Rufuz)
Bez odwrotu (feat. Dudek P56, Kamila Jakończuk)
Style (feat. Wigor Mor W.A., Mor W.A., Frosti Rege, Dedis, Kacper HTA, Kaczor BRS, Michrus, ZBUKU, Ero, BRZ, Nizioł, KPSN, Śliwa, Siuwax, Ostry BZM, Hukos, Jongmen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcca3db28a84a67556dbc9b604825b3b570eddf985d24127f70f719ea1c4d981. 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/PLF241905938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e755eef37a592a8d7b85f40a4203315b79fd1ac22be31263cbc6e9ad1987aed. 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/PLF241906049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a020db692641e81443b7941e3fbb0d72237826c7427352d242c07d0480b00. 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/PLF241906050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acbf4227b17c16eed186a5c33b2f36e6faaf1ecc145b83d975c7c52d3d7a03b. 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/PLF241906053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e41d177f6957a997fe9334105d0a682395673feec22eab92884c68292d4ca9. 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/PLF241906030.
Najlepsze dla mnie (feat. Dedis, Kafar Dix37)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeebd1fa5334e4c3487afecb31f95469c54e2e22463697ab95493639b41382a9. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PLF242107532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7208b881018303e0130db0dc1697e5e7dc5554097aa9b0552e14abad5c99a0cd. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/PLF242107757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76128891ba7b5c4dfcd6ad6e0d2571e4c0c3ec2e66716322a0cd45bd9de731f7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:48Z), 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/PLF242107568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23a2509f4b893984f1f94303cb7dcedc051c68fb45088edf9e0d03f9dec8914. 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/PLU941700004.