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 0xaa69145cbb4b6a0ae2b11899bf11786789f71f25a345e309a3efa1e30b38d1d2. 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/8e72a890-80bc-415a-839d-59747e8633b5.json and https://artists.proofprofile.net/proofs/artist/8e72a890-80bc-415a-839d-59747e8633b5.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 0x10b9ec03bea7eee7ba6c7ad7c8c062a55983be6a097f50be6f981cc46e8d253a. 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/CH0600300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9f7cfbbc89281872ea2aaf1490f74c7f02942e05f437e9136beab9070dd517. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CH0010700773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd497061c921fc5134b1571dd6d0dca770203cf2e9328935ad0ede8eb1112fe59. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/CH0011000151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751de3df086b24ab36675729c487e713b9f842c846ac92644a988f98fed2def9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH0011000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c4c86bd71685927ca2143cf77191ce24d402e83f9d5fc8bd0ba3508f837e71. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CH0011000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6627c6f0a091d297b20c61b67cebfb9903b05e92653b60acf63b86c22c2467c. 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/CH0011000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e7f849be4b2eb59e4d41753fb1f078c9fcfe35642dc105332ae048fe429adc. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/CH0011300175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ed9b41d8fa3d083983cbc445e57c51977440fbb9a36ab7ca931d69941dcd55. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH0011300180.
Chum mir singed die Songs wo mir liebed und tanzed mit ihne dur d'Nacht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca9d22642ba1bab88615aa421bc0edff12e23ecef155419cb1bb35da5a0d7b9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH0011600137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d5fa3380f42843ff753efb2a9248d0c5831d3e8921c90b097cce37a238e424. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CHG352400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bd29e7d6f2f24a252d59886dbb924832978a0dc6280e4deae8753598f1e4a3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CHG352400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6f5ea3b23af936eb4b2e466a6bc7c9684955ab018fa1ae8a4d4f5596b62140. 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/CHG352500271.
Amerika - Duett Version, aus "Sing meinen Song, Vol. 2"
Sing meinen Song - Das Schweizer Tauschkonzert, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ed4158fd6fa9f81c8ec99aaf5a725c5d73413c70a804888d184791a09134f1. 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/CH0832100490.
Through Your Eyes - Duett Version, aus "Sing meinen Song, Vol. 2"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4a4da106f12ce1b9fb3451e2f8c367cc5804574c475c780e4761e30a07c7a8. 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/CH0832100440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d7e967add63254d5f9b6cd7b984db0315b13bd381871d12d0ec5cd7a20dea7. 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/CH0832100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7335f0f4295209778de63e96b4b6e45b2165831831f036c761761595d5c270ce. 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/CH0832100090.
Through Your Eyes - aus "Sing meinen Song, Vol. 2"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d787f30bb0a7ac07e3432175f53f447ba77a2044f6d7c79ccf8882c68ee91a. 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/CH0832100340.
Lüüt so wie mer - aus "Sing meinen Song, Vol. 2"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63f16f3ed9c1c23599ce06f7f4d21787a0fbaab6eee441347293ee49dffddd0. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/CH0832100300.
Bombay Sauce - aus "Sing meinen Song, Vol. 2"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc2826be99bb3a815da5594e62fe91b3db1dfe0e9f1967f7f4eb2dc64475778. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/CH0832100190.
Nobody Wants to Dance - aus "Sing meinen Song, Vol. 2"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7afd3077cf3541bc5cff4005ac930932b9423666b151188dc7d2e32d8fad75. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH0832100420.
Sing meinen Song - Das Schweizer Tauschkonzert, Die schönsten Duette
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4a4da106f12ce1b9fb3451e2f8c367cc5804574c475c780e4761e30a07c7a8. 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/CH0832100440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ed4158fd6fa9f81c8ec99aaf5a725c5d73413c70a804888d184791a09134f1. 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/CH0832100490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1b63145913abf240c6655bddc47dea99ce11ec06ad545eb75bafd4f3352785. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH2181800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4e7ba5c01e8c56cc2b8c448fc969291f6ce6de76dc85a4f02443e98d6ebfa6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH2181200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7e50866d41c059d4128bb3e815495e459c8247fdc7ee88c2e3e7a4b0f14973. 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/CH0012200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052c9ddab05aa1106516df46556f385b958a1a1034de96a1f38d1c05aa411f8a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CH7812349525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4e3f255dcfa7cc555a91130f356b0fa4ab8182c7244847ecb98fc8015be096. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CHA142100033.