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 0x48fa834ddccc4dcc1d0b9116e9378f3bd3818b5369f925a2c2350923c83b9c22. 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/09534288-f803-4594-9d33-4e84fa041fc2.json and https://artists.proofprofile.net/proofs/artist/09534288-f803-4594-9d33-4e84fa041fc2.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 0x13832fa79c00b30cce07ebdd7b624ae1a27a7cfa16988ca7c2f8692b9132ee7d. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/PLH441400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e045a031c9783bc7766e8285cf15502e154df644fb77b4cb4a3eb9256690e0. 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/PLN561500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c1f1f4f42b116272911c7051c3ddd44ffc85b0fc04fb4ed0689b39c164fa9e. 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/PLN561500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e08133f16bad2cfd25cb53dafc498c6a35524efc68e3da3db6f5864af37a18. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLN561500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775fe4a5ae317308de30c0ba9133e4004e02d5cc0b43d0055d2fafbe740b6817. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLN561500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb23a400a6b6bd28497a852818298edb4b99bdc0ac34aa51c4d326fd3a184517. 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/PLN561500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f7da56c3fd7d3249823904fc0cf2a7f2d2452925228463b90ff476ca16d51b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/PLN561500001.
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 0x32e1354d75de02c94bf11dec5c92d4194138b6514cc2b370f2aea1211f5576ed. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PLN561500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eca07fc0f8ae233e7913eb72eabb7b25568c62be06068fa359b54cedb4f8d0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/PLN561500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0772d71f62471de1b41ef6253da331cf2f7ac2fb0627e19fb5a7b9e547573bf3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PLN561500007.
Jadę Dalej feat. Procentee / Peerzet / Eskaubei / Te-Tris / Skorup / Pan Wankz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1a513fcf0455d21dd09af7d4dafb0586916d2717c10f2a018af43c8447f623. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PLN561500008.
Nie Mam Klucza feat. Marika / Ania Sool / WdoWA / Aha T.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa820c38423b5afae159a8c4dab943e13a2375544cd6215c51172a224f1fc9a64. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PLN561500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5c9264255fc436a5d6a6852cdac739b4b584d8b020746e268862603ec56850. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PLN561500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674d3e1eaf43081a34d4f104e00c7b3c22dc051ac47a06fcca69cf796922b8db. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLF242006974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a7b8f253f9691a2ea21fda5cb0c629ae79d4024e0fcdf32817762e1b3f4cf7. 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/PLH441500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b59be9a73fd0067f29344df1238d7cc0c16ae337aef044fa8fbc9fa6d1cf768. 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/PLI368383970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf05100a17df733a4009867b75771f790908dd5882262fef013839b0ba77c2e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/PLF391400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d53f3b28a242391e2a90cf2e8b4ebaf8e305c2ca864899d8b1d7a1e0de56a1. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/PLA591400427.