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 0x3c43f475ca2ca82ba61e55adfde3e4448088a8ab8e0af2e2c7c0ce130f66a5a1. 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/0a61ab6f-a362-43dc-9a4c-dba5eb9d4bf0.json and https://artists.proofprofile.net/proofs/artist/0a61ab6f-a362-43dc-9a4c-dba5eb9d4bf0.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 0xcb8fd437d2a5ed4f838e3b9bd6bd9f633b048c92fa68c182b65432261553d3cc. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/PLC062376504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85b72558ec7670c34c81975630bdbd8f166e006605016366abe1c4fd3d3c88f. 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/PLC062376505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2050169d8e7a6759bfc83764573630d8c4a55f376b476f210beabcd2415fbec. 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/PLC062376506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3974e7ebf812f9352ac0acad7919d1665d26fa3382b552eca600342c00da6e7b. 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/PLC062376507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb118857ac51368ef88101fbb632009b6a7828465799e8f2f962ae3822288deb0. 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/PLC062376508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cda7cc1207ce5d10232c941707973577b445042d17fd3bdd18e6677c6beb91. 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/PLC062376510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d47305b140179b284e05d9eb9eae04198291a5e3dc2449a0db1ba0697f3250. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/PLC062376511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f18fea1244380df4b14e92f7f97705139e0919652ae2e19586bd0cb6a22ad34. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PLC062376513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eac4ba0f9a77c0e4730ff2cac49b07fbcd64697559706e8503eb1cd326f183. 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/PLC062376515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419a364e878ca9424a155c289ccedf6f64547338e07f1e4eb2b1b928ce9d08ff. 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/PLC062376516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5544c6616b36911e7f1b07bf7180cee7c60dfa580eb79427608cb202f4e2be. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/PLC062376517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e18323eaafc645ddcd67fd535a14ebf45e23b556fa9a5c7ceae796e53078804. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/PLC062379927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8c20570bc87ea2e270246bd16574f00e4df0cb106d17add2841d501720e756. 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/PLC062397482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d34cc87c0a686c90230e1a049f4b5ef494e9692502ae8b7d9ddb072c37fb5df. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/PLC062420184.
Korelacja (feat. Miejski Front, Wolfik PN)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec95e814ae6e25b9e648bc12817a92c335402e18c8ec1cdcf47b82ccc5736b01. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLC062420185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f04d19761cefab7007c4f1da38fbea12cc569e1f9ee039d4121d6885959c953. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/PLC062402414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2792c7704ac050c593666c9a6de200baafa3231e8b0b4a6e578d75f805c8178. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/PLC062420186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd33aa2790c060e612bea7f96fa7eb19b463761a5eeb8d5188b688e0bf432846. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/PLC062420187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d8b54b90840a312efba7ed44b0ce71938a6de5084900c03f6c188640c77610. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/PLC062420188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75f84417af036918747319bf0d806715b66bac19f31b8c1e5ff4dc80a4093f5. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/PLC062420189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddded7020d7f78f7ef2521ad79e970375bf941a17cbd5062babc146578003b94. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/PLC062420190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fa33f184c88b030c7d7ebc681ef9f0245c06e23431f6269a663f85ce5e3766. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PLC062420191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc32a58e8b0a33c97199b731188d950a39640e56ffecec0d177db3e8cab15337. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/PLC062420192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32fd669699d198d62d66314367222d8536aeb0b84e53e84f748a0e63b67d7a6. 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/PLC062410293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f03b5178d37b1e7557b5d6e4c1d6dfdf734b6591ab4e8aa27e877b62444e3d. 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/PLC062420193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3892dc2151a4fac59937f19bb4320105d8d4ff54c82674beeee575189bd73d9. 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/PLC062420894.