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 0xa7c52bb724a5896df1bf75a2f8fc927d40e0509c982783f7cfab596ee4fa4687. 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/7f65e9ee-d042-4746-bc37-c1a5f3f7ce8a.json and https://artists.proofprofile.net/proofs/artist/7f65e9ee-d042-4746-bc37-c1a5f3f7ce8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ostatni mazur (Jeszcze jeden mazur dzisiaj)
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 0x055ee8860fc4272cacdeface587dc3a3ecdff58751c19a4e9d9defba7a6b8b52. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLA246208463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478f1fe87cffbec2155b8ee4fd60d4ef6890a0c8aaedee7d3310ba9e1e728056. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/PLA246308934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cddf13690e95878a337150d7729781221f65ccc5abf6becdd50232fd8bfdb9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLA246308979.
Echa Ojczyzny. Pieśni patriotyczne, ludowe i biesiadne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058f068b911815052e57e4dfbf5ce2344a36e0adc418b21587171ceb5817f82c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLA246409142.
Pobudka Krakusów (Dalej chłopcy, dalej żywo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae791b48224ef55aa3a54c80ee77d4675a503485e310eaf94d9af614b411ddd. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/PLA246208465.
Krakowiak Kościuszki (Bartoszu, Bartoszu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e82d0fee8cb11bd448edd07e1243dbe01085ddba9a5822479c17363021cfa5. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/PLA246208464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055ee8860fc4272cacdeface587dc3a3ecdff58751c19a4e9d9defba7a6b8b52. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLA246208463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bd846abcaaa1a321f2fa22efd196494917aa34a31d9306cbac052f980b6f3d. 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/PLA246208470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6606c1308036e4f6df8e84a700e0224021c6d2cd5c9cef2608d487e8774a9b17. 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/PLA246409244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a559713ab0310be3e01ceddbe1eedc4236c31abb5cd0953e52d8bbc89f7510c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLA246409245.
Chopin: Mazurek Trzeciego Maja. "Witaj majowa jutrzenko" (Orchestral Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f6df3362604b03c27c81fac3a9d2a807f29b697cc992129548e5823aff3149. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/PLA246409246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8aa6c98e4186668cc73323e7fa2cb471d12424d3c425cac8bd69d348410fd6. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/PLA246409247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b69f2777e3e2c22eae320aa5938dcb774492e892519dca78039c2ed81a32a7a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLA246409248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567539b83e69eb010e21f9d015ee85943db0c32835679fe5ecd614f4c68d6b48. 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/PLA246409305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfab20f84b61d6a1bd876de25492908e06d9371bd09c55bcb80c537f67d73ac. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/PLA246409306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1048d9a6b89ffcd7ab487ce32beb4cb0d84bda828fd96626a281bc1507bc04. 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/PLA246409307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70884b572248d175f53e01e2fb0b007405bd9306f068d939f6d1bf4e173ebb9a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLA246409308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b9ed408cbe347e7813351f6f98566300c7d0e3b7f380fecfa84337990ed36a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/PLA246409309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448f1ae4365d551e9a1441acb2510cf312db266e34ce188f8779b8293441868d. 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/PLA246409310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f4efd1942cc6b126c05624cb58ded161d402536bf830bea92ff0dd6cbbf21. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/PLA246409311.