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 0x1d3bae7d464df503e99794523efdcdfa5121e3e5bf6a412ae5446d789f42f9a4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5e94515-8987-41ac-bc1e-15e1e5cfa12d.json and https://artists.proofprofile.net/proofs/artist/d5e94515-8987-41ac-bc1e-15e1e5cfa12d.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 0x6e380f0587a29ea2b644a208ce4e1ce611f4a1eef349c3439aed2fa701ca428d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:43:34Z), 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/PLA550900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a986b5279d63302dd9ca41aaf219a9134b033a74839a1303bde4c0f5154b624. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/PLA550900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2a7687f31bc39e95d508d261a66da84980db8546efc743027faa6c8c153611. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLA550900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e74525a0385d84c4798029d4df27901efdb62da9f8611d67089cb6c6a3c0dab. 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/PLA550900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64783660b27e516a61136a3830337017a63a9e813282b484c44ff84c7e80c425. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:09Z), 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/PLA551200351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1bd15567231edadbbbf1cdcef337f450acc85eafedb5ba91c6c6e4839cf5af. 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/PLA551200353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81276fd3c7d3d47de1b6f39b7d7cfe2b31625a0ec0925db84e32a7a6149cf94. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/PLA551400712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caf219bc996b0683c676b98dd73c0036c2f9286a7ae5626dcd63886d1278700. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/PLA551600643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c65c901a3780cf4024dd1d17a88c391d323dd88d32072e1a061b048a678523b. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/PLA551600644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0a5b4bbb1ffd3cc7f4f5cfdc5780bf7146cd162462556258c5ce9ced667ac8. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:44:22Z), 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/PLA551600647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0143e64fb1932f7b7ae404d341be2373b37a9546ff9272afade89abc6640a364. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:25:03Z), 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/PLA551600648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfaffcbc358dfc16ba02e8eb36056c45bb314d98d841c98a4d3d8269d97f9e7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/PLA551600649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b50af44cd51653e0240965b4b66b342ce2c48ab3b081ff1fd04ed0c4888119. 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/PLA551801286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e294b9543c701da2434f04b3418dd5cf0f7a3849921cf908ab1840c1d5291bd. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/PLA681902419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01aaaa5020e5d5b929c08e88bbd02348145b457a635f41ca6c09db36da63b0d1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:56:21Z), 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/PLA681902475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c720b058451c88a7d59f4b6a01225dbb173f1075212a0ac049272986dfed9d2. 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/PLA681902476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1800e8f8ec7c55ac4bb6d502858912fe1975fc00fa23aeac25c5cc45a82e8465. 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/PLA681902447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b828addee02c88cf610142d4a959a32985fab45524bb0afdb1812c61625a029. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/PLA681902479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb38720396ba5c4219e934c9bdb9b04e7d33038ae167bb46836363ddf89960d8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLA681902481.
Robin Hood i Szmaragdowy Król Soundtrack (Storytel)
Lej mu lej (Storytel "Robin Hood i Szmaragdowy Król”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647880f40f32be0ce779e50c1c966337878c35ff2dc71d818837c0568d4f797d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:09:50Z), 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/PLA682102925.
Robin, w kapturze ziom (Storytel "Robin Hood i Szmaragdowy Król”)
Bitka (Storytel "Robin Hood i Szmaragdowy Król”)
Bitka (Storytel "Robin Hood i Szmaragdowy Król")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb08fee401f1eefda0571879bec48b94b4f0c4209bef006e2ddd9599cbce715f. 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/PL2DY2400803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac33df45d462fede9aa6f029593331674958d88d470bb22402db6714d2b84caf. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/PL2DY2400887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdeee2ad7317c11838e5dc3b13e0cd61c27b867f12566b3549a053d687ee6ff. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/PL2DY2400957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67394d55b750a1449704b1a27369e60c5c0188d350bd70d7d0c1a4b714f3b24. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:31:00Z), 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/PL2DY2400958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6effe59913998f4cab88cb535f741c494b34f27c5a1002161329c4167c34f125. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:03:37Z), 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/PL2DY2400959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f5cf0bc2f71decf74eca8ea89a20837851f396416b116858d926438a4c4fb2. 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/PL2DY2400960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a938301ab511f2e60b907573f0452efb53aa4c3d6c37d6a8fe5fc527ae20bc. 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/PL2DY2400961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42c3ea8fb02fffeffc3e122aa6e6fbcb1eb3a30635d07f06c689e4b3cc0f567. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PL2DY2500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b50af44cd51653e0240965b4b66b342ce2c48ab3b081ff1fd04ed0c4888119. 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/PLA551801286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4d2b8f9de2b6b6913787b41117ce3c5ecdafb60a56a9b4710eb7f34c53007c. 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/PLA551801293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd1115f25261ed65f1555077764e599b3f78d56d5c2572d540d62120e83134b. 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/PLA392030407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7337e491ceed05d04d81f49800262d360d7075a5d0df22b89f899b9461a1a6fa. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/PLA551200352.
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