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 0x24bf9b3049b1a1d488ca03389feedd96311f142eb6dfc8b488057a1074278df5. 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/323586cd-1fb9-44ca-9424-c8ab4d549365.json and https://artists.proofprofile.net/proofs/artist/323586cd-1fb9-44ca-9424-c8ab4d549365.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 0x17aaab91f55cebd2e84abcd62b5a03d1b087cc14cb1ea8fa4659f0480a36c2b9. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/PLF241705238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7532f28f44fb455e298d410dbc86e5fe22c30d737d2fa8e0a0dba05c50bf33. 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/PLF241705132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41525eb85e619504420f59c0db04e0b22297ceea9ee62f6c416fedfa224269d0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PLF241705250.
Złą sławą owiany (feat. Peja, Dudek P56)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05770d3c3ef32ac57f0f6961462becb1e2cfac88024ed15ff0b14223f4f5dda. 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/PLF241905888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32588a8822d29ef3ddc878acb322a22b1d5067bcffe2e2868cd1b9365028a8db. 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/PLF241905942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcb31349b545bb8474ae01c2541757c574d946b70b47a778811a5f6f94f4255. 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/PLF241905924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ec8e88dd183fe042aa971bac76fed0d4775c0083dd9982caa1e26d6db99deb. 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/PLF241905941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6376fe97c248140c7ef540826c35c2fd64d98b53285968e30408d37df50fdc. 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/PLF241905943.
Uliczne bajlando II (feat. Dudek P56, Bajorson, Epis Dym KNF, DJ Gondek)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b59a57d167af40a5c0191cb2a843a6de7025d966fade91cf47927fc5c041811. 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/PLF241905946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c711561638caa9a89c0dc2f37ce18c0635744924539743e4b4fb516d0d9eb76. 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/PLF241906783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a7729026466fdbdf1a171a4793285447b4eefc57e5dc26cee070a9ef2a7f8c. 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/PLF242006837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996534e43cb6d08ef7fcd0189a0c20dcd09cbcf887e02e79ddeeb3e58acda66b. 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/PLF242006845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fb28b36a8894de7bf04cb984e8bc46f6b706af85f78de1d45b6919f0ab93e6. 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/PLF242006846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5114cf5b53cf3aabf139b203104eecfd19f502dd5bc93802ed841f9fb2ae50f. 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/PLF242006849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d0f313d959616bbd50b5bae76c2944a1d571fcb1f43c679e9b814b0e724e79. 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/PLF242006850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb6ca43ef821d81a1c70e9998bcc663f796fde9e4f738414505644505c1b2a9. 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/PLF242006857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96040c9280a00a8aaf25c2440a54781ff2c7e73aa788e48a5c5930f1912cb83. 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/PLF242006853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a74b8fa6e2f83fa29ed6a95c2b33a4b7722bfb46661536659fbe6f9a1abc9a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/PLC062410500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59353c71502c819fd4348e774aa1da0dfed073106e8237626c847b9cf5c3391. 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/DGA062496721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77f92b1c125d2b7c530b1778da40a54e96d137d66824eb772020411c1c87462. 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/DGA082458050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01362173d118491a06872643ff2293b4124dc850ea031bf8565b9966d0f4c14a. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DGA0T2460107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc613c4f5c377875f57e2834b6ce48f310601bbd74b158ae1b3c4db9967fc2763. 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/PLF241906119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fb650d933c9ddbb17a98c451ecd5b4289cac2d4d88a97f5a847e38b3414a30. 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/PLF241705432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831a5f0111838a5dcdc2b197b937e4828b2f47d8ce7d29843cfcdb7514cf8fda. 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/PLF241705384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaf0a0960c6a029944a38ad49113a41cec7644fb6837a382e003f2bf2a7e616. 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/PLC061908113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c68ee55a7371e012ac0534ea7a86f80a080356281eed6049ef49ed181b7367c. 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/PLI362894270.