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 0xcea5e63781ce93a94dc78c5692cb4ae0f15a79294e4015b4e8972269d38e363b. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95e7998d-37d0-43dd-9fca-2267ea299fbe.json and https://artists.proofprofile.net/proofs/artist/95e7998d-37d0-43dd-9fca-2267ea299fbe.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 0x4bcd2bdb659ce472f00b04be4e03dead181ebf359aa3b8cbdc207e7d40fc9d74. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/PLF242209133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8576b5753eecd35d21300aab74839e6fe5e4f71d593d00e1a73b750254b68e. 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/PLF242209135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8f22cf48281da34c1130d177d0254a5a535aef475e326493b49a9b8f2faa10. 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/PLF242209136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8435b94c1bb968fc77d3d47379805f3fe6e3035f1cff6e64c386f3463c474d71. 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/PLF242209141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78fc692948542cdd6d9c37ad8670135dd1f0da361ebef017cea3cc6438914f4. 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/PLF242209142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c8019ebb84f8bd77e5a2f0d54a5bb4422c2483e3994faec4ae08c73a1b544a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PLF242209146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098dea14558e58d739e972bea32f17d780594ae4bb2585b6a3e23114153e08b1. 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/PLF242209152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a967ef5267b0ec02787474059ad9cb426c2119ec353d3e55d9f4c734b162dd4. 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/PLF242209134.
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 0x00c8a764ba9b7c0c4892f55af469462921d4d05947142519eafd9b73a763221a. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/PLF242209137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee6829d0d4169b91234a2a5b5f3ce13f2b1048e038a42da5ade3c3fbce05c2b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PLF242209138.
Rap/Hip Hop się tu pętli (feat. Lont, Kowall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9b0051ace5f7ff9685c14c136af9c15dcc5c600f756045bae58a9b71fddcd6. 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/PLF242209139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584bd03676cd6f02b7b7cda4ac3665bdc998e26239e2a3d355a54974e2396af2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/PLF242209140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59308f4bdee98f5bde376b0bff831795c39a2f580631c7120a07dad3f0ffa3a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/PLF242209147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fd03ba3a95705438809c22c0e5cb8612645aa0a9121340009b39d3b42887d5. 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/PLF242209148.
Prezentacja (feat. MC Illo, Lont, Def, Kowall, RY23, Mil Mnóstwo, Wasp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10985abaf75cd821cd5779bfc76fffd117d7296f4c9d031ed751201512391872. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/PLF242209150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a667fbd51359403ea3bd66d57e86e59eeb80af0ddc164bbfd34f0b6fefe2676. 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/PLF242209113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbd91b78aba2f8c182d161ba1aeab4628e8fcff84170b23e15b5693b44e0178. 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/PLF242209120.
Rymy Gorące (feat. Mil Mnóstwo, Marta Krzywda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee9c94196ae36cf18b1e7357d19b26691efeff977b79733703547cdc911c769. 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/PLF242209122.
Zrób to Głośniej (feat. Shellerini, Słoń, Kaczor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434ba54342bc7cabc197f4d2b7ffaf213d595c2e8804368ad640c4bd2cb22b35. 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/PLF242209126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc59fe20f3c8d5ff878a1cf862d5a7089de66fc73046ee0957fe009370dba3f. 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/PLF242209131.