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 0x65b8d9e4b501e5158765a2e5885e87304c94a3e857d53673d9720099bb27c9b5. 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/aa5da01c-9e9d-40bc-a9ba-8b7335858a48.json and https://artists.proofprofile.net/proofs/artist/aa5da01c-9e9d-40bc-a9ba-8b7335858a48.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 0x98ba2fb3439fd88bb5710ce7fccb9e865992f512630b30c405fbfaa4166ad5cc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM91159132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc286ed6fc96a5d863a00024e0e0baea2d4a49b7db8eba2c0ab3cfa336a108f89. 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/USHM91159135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91af82ad16485c040d70dcaa2884e73b8fc8b3eb866e6048749d06e45fbad294. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM91159136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bc82cc547f1a654432b9e085e3f0bad27e153d116f586420f80b6bb5090b43. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USHM91159138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651f1ac1cc446990ed7954a9ab1211cb659a7d844ae0e38328fc2c0b486db7c6. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHM91159139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927e37828eac900c4027bd2ba4afbb3890f5d561a9f0bc8b417f2ae9016b70ad. 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/USHM91159140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf782b5d2615efb334a673351adbbb5727c442bf0f2999e91cdef9ffa57c8ee50. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USHM91159141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97512707e628927baf3ec422ea3a471160a5e2b17a925e7096a420d3c928652. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USHM91159142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4525adcb4d2300fd97d6b1995d4973fa2a36e40afc28c8617792ab48e77906. 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/USHM91159147.
Przeboje z plecaka przedszkolaka: Hits for Kids
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb630788045f1262d21c7dda8b3f0b4d977bf542c2bb9822436b6c2c9f738868e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USCGH1254093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230bf03933aa16fe22e9b77fc6b5a955e65fc3061c7bf62e4400eeb84372aa37. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USCGH1254096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9971285c61aeac7042b8de0e5db376e58f57715f154b464caccdcf106ff08a49. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USCGH1254098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ef7fdb64ab226bffb62245260859f1c12e5166ce1cfb378ae57c18a4a30393. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USCGH1254101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a92009a4bdd7eeeeeeeb61ab9a831a20c13b105e86f6384a347f91319472d94. 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/USCGH1254118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6eae5345da863581f204b7d83a195a3a8340b17d301662e56418fee5df5b88. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USCGH1254120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb362ec299f332a31603e9bd83354dfcb88769ad6356e7881be9bb75aa5346e9b. 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/USCGH1254123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be7182b6343cbc00a47bb49a58145eeff75aacf9b13530af7be89ccb6a19ce0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USL4Q2199485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63757c387a0050b85fdaec2c1a24d6093eb85c477c4140fc61c696b9ed21d43. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USL4Q2199486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad8e6976ffa5a5dfbccbc74f963a022113f8d9830e62b0581b8b2bb7d024c26. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USL4Q2199487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2fc815a0ebc057965c6db0d65b697f6750fa85668dc2c50bdebaeb1df45a2c. 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/USL4Q2199488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb228e222a64f40eb7417d227b5603a39358b99a7c8663304cf7b2ea37e467914. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USL4Q2199490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121d77ec8a15a78c50d6c7889997e59f0ec991be537043ff5a1469682561a462. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USL4Q2199491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd835a67bf4d4d879fdf887b0de644e6392f140de27586d04e0b1c38d4704b00e. 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/USL4Q2199492.
Niech gra ci kołysanka ta (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5750c03454931391bd100f672fd2c3bddd0f723fb966957bfe22ed213068808. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/USL4Q2199493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30dcd51ab82ae8d7cfe85755fd20b995bf8866614ed8d685e799c0b8381c0b7. 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/USL4Q2199494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7392ab3b93bbb258e1949604f8c371a0a26e7aa28a3c8c5d30fe1185b71d4df3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USL4Q2199495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5eeb59db2dd5e7600ebdba02d81390fc3fe97c4e258baf36071699624cab68. 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/USL4Q2199496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fd814649dc2b48b921c773fd2d9b2397b838a198a4b5777e7b8976cdc36676. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USL4Q2199497.
Piosenki Dla Dzieci: Edukacyjne Piosenki Dla Dzieci
Piosenki Dla Dzieci - Przeboje Przedszkolaka - Hity Dla Dzieci - Hits for Kids