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 0x32bd7ed4fbd45db48afc82e1650796b7a8142a9de6752b537ab17f74b56bc9e7. 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/c3e22fa5-cdaf-4b01-960e-6f409a5ec573.json and https://artists.proofprofile.net/proofs/artist/c3e22fa5-cdaf-4b01-960e-6f409a5ec573.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 0xaf3992b915e43cb1c3383124ede2c34a620cbbefedbe04c24cd17b48f8853a5e. 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/PLUM72200610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6ba80a50944409d280b9bab491b43294b72d4a0ec01991845b92d934b9ad04. 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/PLUM72200611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ee9055263fdd656feefa402de70ecbc293cf9f917137b3789034eba0506acd. 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/PLUM72200614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5b603122c15ff43c578a0a46f7dca8f64431573daf6fbb42606bbbff31b0b1. 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/PLUM72200617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5abe119e3767a934bbf587ad884b05a6d2ce8618c9d3dceeb06e9161b62b51b. 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/PLUM72000263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b8a7b6d00cd1d656068d632f6f737a26f347b9fd687a568858effb3db7e6ce. 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/PLUM72200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43909f502b5d63c190514ca598bd2dc2024ac44b41f246044a75dec572ad61db. 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/PLC061907562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1715fa2ff28016d9d8f01423c60dadb815674dfd04e9d6bfcd2769ce7991118a. 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/PLC062377053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff716652715f8d9eae2b8ac0ca4e01e3c31d7ea420fb3bf9e44ef4fe1d7db5b. 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/PLC062377056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd52d695e700cffdf535f765a65037fae8eb37772217e66204964ffbead772d1. 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/PLC062504695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7592682b668b1005dbf95cee382725390371c1da7720065dc4245c1f28be61b6. 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/PLC062504696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733256a738d1273c9b5019b108f9b1d42c8ce1fcce6dff3ac81c36d2aca4defa. 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/PLC062504697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da1e3bccf414c5f3e6306a295680d0aec2f4141f433cfb6b56b800767172d7b. 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/PLC062402598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d295c677161b5af365455e18db99ec36b57dd650be157d9926d3e847b49948c. 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/PLC062504698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4787a81414843dd02198c5c0798f1769c7db017c773f532e6b4f229049a62727. 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/PLC062504699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1232f60cfda63547e90fc8dbd3850a97a066f3cde3d5157178068efda5dd35. 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/QM2PV1827493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37582de7eb60bc764b6d4d522ccab27c70e8d6f84cc4e83cfbc0debd49dd443. 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/FRX762152123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf995b9f7c544ab7f98114287738a6cfad3c5e40541248eae52582b8fb303ad84. 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/PLD501700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaed91c04737262f716e9ed761061a1b7a337023ad6cdfcdc7d3e88ad2287ef. 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/PLC062511409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3dad483479f27b0fbc25e60377831934e4b604bb7e2bfed6e2d314c2569702. 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/PLI369707150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5abe119e3767a934bbf587ad884b05a6d2ce8618c9d3dceeb06e9161b62b51b. 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/PLUM72000263.
Kiedyś to wróci (feat. Solka, Praktis, KPSN)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575d16ed7506c6c661e2ab31417e01e57f0fbb8dbee6be2ec3db315444b3cb6e. 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/PL88L2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33f8dc61ff1f2b50f68dd179e91452978ac5c12a3baee8ed29f7e90a0bdd698. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062361268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0c0b67b7df46131dc9d65f7f3960dd2eb2335c0e2781db5276a4ec2facf0ac. 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/PLUM72300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fbdee8931e9029ae33d2ed159f2a56d4e2791ebd9a3cec037c3c4ba4a8726e. 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/PLD501700137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9b26e863c3b8920be05634e33a89d6e566a808662506696b4adb78ed014d92. 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/PLC061907756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6f89e98a4d054f6c35b283306628a07a0170b0df3681c80166e1fdc452386b. 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/PLV401700146.