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 0xaf59c8b5636d5845b144ef730c9710c40ed4530f8895f2a2bc545bf54016c18f. 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/3a023029-8cbe-4aa5-8a70-e2f7b954dae6.json and https://artists.proofprofile.net/proofs/artist/3a023029-8cbe-4aa5-8a70-e2f7b954dae6.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 0xb70ca9f76c45087c682c01956ee1b257b22c48f0cae54749d78cc86117de0c70. 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/PLF242209886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb27577b18981e59f76940db12d308737dee6a93913dc18f7ca0ce3c8379f8f. 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/PLF241906352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ede9a84efbb7dfa7d0baf458a9a9bdd2d88f713538e94884cee6a022c04142. 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/PLF242210927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a177e57721ed66acceb8273185202e2f457e2274ca817e9dfd08abe98677ba0. 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/PLF242210795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4112af0fb8146b1ab288d2573946d83e6bc4ba602109c403474b047509911d. 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/PLF242210189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e1352056fe4cddde423fb08f27f55fddac1ce3674ba6dcfd725726b9453fb4. 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/PLF242209823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1183ed1315a775d60b7004ba3958d293ab580482266421084942f1b2153398d2. 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/PLF242210197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a60a8b574f22a626f7df2edfdb940e61f2058deb7248647e9df6b049d8ccbc. 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/PLF242412213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d54095af418ec470aadb04993ad6091ae73884f450accc818340112a5f389f0. 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/PLF242412214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0119828db94ce4680a927bfc3e14fd4ea675d63de055413ebb5177ed4d67b39. 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/PLF242412215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39def4c7146c42ca59a9e7dcd0fa576d82333f8a7732e137d8a1becd5d56ed73. 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/PLF242107588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb815ec4159daac3430b940a663b33207e8008b3eb754200c125b2c3c05e85. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLF242107590.
Tak to widzę (feat. prod. Flame, Szwed Swd)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee652c084f1d8ef0a9314e377bd307e19b81edcf40591154464b15682db7b42. 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/PLF242107591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c93c3dcf3f2e59acaf79f3ab04dd16b389019ce73966e2f5875ca8a5e962e6. 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/PLF242107598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08946a3a54eae2edd740050d54de4ec396bdf24a7c5778b970564903e4017499. 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/PLF241906630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70ca9f76c45087c682c01956ee1b257b22c48f0cae54749d78cc86117de0c70. 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/PLF242209886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb815ec4159daac3430b940a663b33207e8008b3eb754200c125b2c3c05e85. 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/PLF242107590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c6d49e82c3d6e04d03904ff4baf158c5921087ce7beec2a471e0c7d4195f70. 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/PLF242007145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7574297aa291ed9f93dd25ed29e9e0c82b0c579332e378008b7f02e11e6abffb. 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/PLF242413491.