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 0x5e88f19ec611e9af00778a93d1f23f26fc09c5fb9646eba307d2ecc960927b3c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d772b9c1-0429-4df9-b8e3-b00af5882db2.json and https://artists.proofprofile.net/proofs/artist/d772b9c1-0429-4df9-b8e3-b00af5882db2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd20490b52a5bad9a7657466a919e42846d7a5dadcd5b2f7ea40f9514378aaa4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLC071407001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eca3a76927c5f5acc0c69204623f9fb59e6a3c5a50879fccc745c55bfd7d5f7. 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/PLC071407002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a7b11e039a0d27acc7d6eaed453b64c91395e916b1a9b2cbf4784c66d90d00. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:36:33Z), 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/PLC071407003.
Dziecko We Mnie (feat. Hades, DJ Eprom & KęKę)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a1f3c71a5a8b34564db6b53a2faed7f3cce58fbbc68221d3af149da5df32ab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLC071407004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86633b707c677a558a751d0cc4d9732f1c548237b502b5d9cb77ce157bc46eb. 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/PLC071407008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8655a321caadfacb074c1695d8d949b1fee809aade7ac38f0be992fb4d6db6dd. 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/PLC071407012.
Departures - Odloty (feat. Adam Kabaciński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704c3929cfcd0fd2fd69c448015211517aa65a2e4cdaa7e18d545697995027cc. 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/PLC071407013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a349f508dbb49feae727024f466330968299e2a94c7103201080a74aba26e6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/PLC071407007.
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
Anti Hype (feat. Marek Pędziwiatr & Piotrek Lewandowski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5244444b7f97c9d078f79f7a90ed02495336e1491a301c9cd22ceca41e1d7d8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLC071407005.
No Turnin Back (feat. uncIERBITS & Marek Pędziwiatr)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9d2475bb4f4143a86cdec1b6d8d0215c4c78dd7ebaab38e7ffe00383d9cfe4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PLC071407006.
Trudne Szczęścia (feat. Boxi & Iza Kowalewska)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8071eff51574a27010d1fe394752ecdba9ff272ad89ce0c41d40156242d4bf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLC071407009.
Demony (feat. VNM, Ten Typ Mes & Tomson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7675b1b9a0470b81aefb5576a76659ad317ea59757666fc9f5461e1702e2f3b. 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/PLC071407010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a84fadb50a14472aa7afd130da0291cfa4f6df85f280b599351ea94074643a. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/PLC071407011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0e6d8fe957aa01f37c62923050ebbfaeccc1d6c3b59a2ea69ae9a7734aafb4. 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/PLF241705285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291b7e58718fbeed80d193c9d6456dfaa63997f05de5abf4b12b3ab0526acd58. 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/PL70D2200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76f078d6bb0c8f1050003d95ff502221449c0b99eb2881e342d5196a1881d8b. 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/PLUM72200481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afa19394980b91b903cabee56608b4e3cb678c7a8eeb08d29acd55a33cd5daa. 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/PLUM72200459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76f078d6bb0c8f1050003d95ff502221449c0b99eb2881e342d5196a1881d8b. 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/PLUM72200481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6fcdc701a534705a44d6049f90cfd9d5d1904c1bc5796672df952ab6b6b864. 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/PLUM72200483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab80782e442dcfd180c61abafae9826ff9cc1eb6130d96ca33081883f6ddb23. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PLA681401519.