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 0x56583564b23c947bec3220b51060e43047e86d42a7b9c820d7e97491c871462d. 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/59881cdb-57eb-444d-be0d-2c51a36eb10f.json and https://artists.proofprofile.net/proofs/artist/59881cdb-57eb-444d-be0d-2c51a36eb10f.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 0x76fb3f6ab56b5baf332683cab0f75d21c5b8749c0d1baeea309f2aba74efe04b. 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/PLF242210936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed010d9b0d107a7881e7c4a627debb1605c51775b855559230dd194e0af5517. 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/PLF242210939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827f4aa2317bc241164b23628e4312e97fba88938f5754628f26b5393b46a78f. 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/PLF242210938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d9e6b4cd6fe8b9ef1bbd9280fafb849bc583bdbbcba7b904739715352b296d. 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/PLF242210937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd153d97a7f05cebcdc41471448bdb1d59e533b2b06e1e4dc579d7662af8d2ac. 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/PLF242210940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91984f68ff812d7d3e4a920d26e7372fe199dff51692b4b2f92a88c4aa43cfa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLF242210941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ffb976a4a6f092bf592ac47774acfbfec20a183a3b5a7a4ca00af99fdfa980. 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/PLF242210942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ff3e4d4fd64b5e6d0de74a86538529bdf5ccce99613f8a27c76cb1d4fc5393. 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/PLF242210943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9210df3c51f8ae8f3f547286b8777ac13556aa84a0cc668c2c9cf08472627e7. 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/PLF242210944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fb3f6ab56b5baf332683cab0f75d21c5b8749c0d1baeea309f2aba74efe04b. 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/PLF242210936.
Na ostatni dzwonek (feat. Dedis, Dawid Obserwator)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a150b0adba7ed6d880c750f1a66a26196a56eb0b8edef7cd673973fc5d2eca5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLF242107518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b707716a4ceec17d774cd22101a9096b740863b5c711566776fc04b6c4fa8b7. 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/PLF242210385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ff2eebab0c02dc0638e7514ad034d8d53b59da5452554da4219d17892a97aa. 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/PLF242108424.
Taki już jestem (feat. Dedis, Finu DYM KNF, Dawid Obserwator, Kafar Dix37)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f635a56b5a582c16d160f877765a2c8095c95acfe35bcf8513b20710c29c44b. 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/PLF242007046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ff2eebab0c02dc0638e7514ad034d8d53b59da5452554da4219d17892a97aa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLF242108424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4078659dc0cd06017d96cac62a3b878810b7c483a606b0570f15aa8488b2625. 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/PLF242108426.