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 0xd9c2b1bb5795a75bcb2fe74580cb1a7855013f8d071d054fe4103856e215b79e. 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/17f94d18-1c31-401e-86e6-f910b917c0df.json and https://artists.proofprofile.net/proofs/artist/17f94d18-1c31-401e-86e6-f910b917c0df.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 0x009512e4c48b678490f76aac326795d7de90c8d768816ab1aa9680e06528a149. Chain 2 (Bitcoin): anchored in block 957551 (2026-07-11T10:03:47Z), 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/TCADO1823373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3795cc0355c4e4888653aed8e52354c44ae589aad795bf15de359dd46ed9b8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCADO1823374.
Ojciec wszystkich nas (Wersja intrumentalna)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737360834515ea8bdf471954c6bb8f404e11695b87c1ce94e9ac71205ed32fa9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADO1823376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9affa2e83df301d8fc4a8c6a809523146eeeefd9d94051a4b79655498fbc9654. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCADO1823377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b5869ae39909475a971e68856cd21edec3e4568bb8869b5d68d981bdc2bf83. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/PLC911900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6158b26df14d1ee35b6dc877eaf14b3ea3360291b141a4450c42cfea6e474b1e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLC911900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f52d972748d5493c47c76aa50b148b9204dd767b88ec45bf7b4cb44c96b0b9d. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/PLC911900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b053d50cdfbda00bfcebba5d39c1eb2c55f959d9e015c458165fe53918f034. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLC911900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb019831d81858c18c99d34ac802a6bd3aa2974127e091bca527f329c52c6445. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLC911900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4163abb5bbdde347e40c38f2d5141dc3937fb1aecff85193be6115e5df91ef70. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PLC911900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34899027ef8ec1df77079bae79a5d07feafce5464165d6bef342843cf81d60f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PLC911900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef894afc457b480d67aea7a5bfbff7e77bc3c3c33858c0ada9ae24c88f277674. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLC911900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8d3f7856af363667f763ae905d34d95bb58391a927becac03689b5780842c5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLC912100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72973db2e91aaa897129760ef4c6fad29b91b32f58a796898ad3a29de05a1c15. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLC912100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54c070d05f568cbcca3b0cef315e3ef74460414ce591f69937657cc10815743. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLC912100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf089bfd425a4e8a27dc5cab9d0727d327001f2ecd958c4a257a3cd8dd1746e. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/PLC912100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfc5eaa084ae230e183c50c4c0cee4dc6baaf251e8fd6e1160c1ee83432e2e0. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PLC912100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962baeb516b99baab4265f5416efd1e62cc17ef97444b40fc616c0bae3c8fbe4. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/PLC912100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fb2f8315369d15835a7282f5e590535ec4370ffb565c2befef514f404392c4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/PLC912100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256b270c4ef54ae9b54bec5a2c7963438d378a0f581b730d6c6874894d16c871. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLC912100014.
Cztery pory roku (Wersja instrumentalna)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83eae04233e5fddd6cce454c6c15e10d585d7ce5b4779607480db0ef4f4f8f34. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLC912100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25f00b9a98069bb792705ed67f2225b1f3072fe7934de85fd550bfa2e2b33ae. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PLC912400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab01f2c82127b2d8269f3ccc7ea41cb5601fe2c5b6701a016a6c43def5f0f8e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLC912400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb777f3ae324247c72b45ee978ef537286285414410100552925af8ee34afb91d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PLC912400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17978b9ba695b65eb4dabfdebcb86f00233f8cd2712e127d5664464cdf7b216d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLC912400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e11a6ca5e4149428e992636d9ee552ed6f0f8aef4a65b9db712f51c1c13a3b5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/PLC912400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135bdaf0cac8d165075833a6589ff0f4455f9e68a4978999632876ad9b0e71ce. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/PLC912400013.
Dzień Babci i Dziadka - Wersja instrumentalna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8502a7bae82e28f8dd8a46492e42b4f45cc025cb47da7008bc9a42004c8977a4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLC912400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9186c7f48ca3edea2db785cfc7e353c3f51761ed0785c5e29a3c9d232c14786. 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/PLC912200014.