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 0x49f163464e9c9a4ae192c4e1b4e7c7169f765fe337546f281e20cba00644da91. 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/df84d488-8467-4ce8-9b35-e8180a75ea5a.json and https://artists.proofprofile.net/proofs/artist/df84d488-8467-4ce8-9b35-e8180a75ea5a.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 0x9c62b6e81e8ef9017a04eb96341b42061ddbb82223be67614b2c9134f6cb8507. 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/FR0W61755354.
Sounds Like Africa (African Beats, Drums, Sounds and Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8a48831946f88fd5aa7ca70b441a992d07916b855359c0c785482a1b9ef32f. 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/FR0W61460962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdbeb38b5ed6f192bd756de3926d263b4374dd26ac9531e52d033e1e37ef5f5. 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/FR0W61460963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805a6db951216d7b8b422493f93ef6e3f612e5f949c7e43c09ac3dea3399a91a. 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/FR0W61460978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992319505de1dff9eb735caf9f0a8f89d10e217fade97eb57fd9835f4091bc1d. 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/DEBL60684761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f5e91f5c77e29c4fec120f178fc0c758d1fd06b2a550b9669988fd681c444c. 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/DEBL60684762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5798dc83b1701b57deae19d8a10c42e76dd2421e1ee57cf987e668a420ecfee. 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/DEBL60684763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98719ada541ab0e5bfb6a06e6e56ecb81ce4d2aa367b5b0185c055074d2a393. 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/DEBL60684764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433dca0984f8c9a5d67fac3f811a59a5c93effcb92ed768569a47cd53eca409d. 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/DEBL61061059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d663a41192ad1a272bf40a6c0e5e116f1a30c1966976b3976e4ef420355c79. 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/DEBL61061060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93328e4a3bf62304e82f44a72f6f89906c8ee7655efdaa4cbeb1ff007b53a69d. 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/DEBL61061061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89ef648b589a67b25e3994103f2046ad1f3ada160ff2db6b528ea775fe6d0d1. 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/DEBL61061062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe553b0b9c718a4165b1cae26bbe43e56e1ddc4e0252cc1efc5a3ee3db741aee5. 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/DEBL61061063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566d9b725d6122943e222d002de21e0873ba050081977b5144fb122746966e5c. 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/DEBL61061064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918636a8fa78ea7ec8c69c6c4e9e8e51a0d69f4dcb8301939c3496f6dad6e7d8. 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/DEBL61061065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404866bfdbf76e27ff5e6fcd8ea37a39324eb18d16168a7b01ab95fe523c4373. 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/DEBL61061066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6de4b0532e135874835d3106b529577d67e6e602eb4a85603711836c5e00a7. 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/DEBL61061067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb647eb88ae422a436e8325d17562db8d8c35ada3ed4ebcbfc3a4cea8c363922. 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/DEBL61061068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26711cbb7b826b18fbd9273077a0f3818d1abbfa6f1e91f52ee9f185415d1ed. 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/DEBL61061069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cb2051f87b91e5dbc8c10c0ce74f9058059c6bab20930865948399101138ab. 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/DEBL61061071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dace94812ac524fff44e18e58fa8847093727df496f5d5e803fba2a3b7a090. 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/DEBL60734863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fbac7b7f2265f5068f4461a300b4135d8a743684150a5be33ad9625dd69aa1. 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/DEBL60734864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cca0a37c92beef15333936115550e4afd59a9607a66896a628ba37af0105e59. 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/DEBL60734865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca515a85625a068fd68fb64823b2ad0781928fea89357e7cc8b3e372599933c. 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/DEBL60734876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629a20e81e191816c4bbf937e336bb44ec7eb7e65a92e2ebf9b739fcef0e921b. 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/DEBL60730468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34f2ee4269cef990ac6ac6581e9fc5d51c04b9b43e314360fa95393fa943236. 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/DEBL60701380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a0cbaf736e30c498ff22d062e9b96676f3e8a3fd9dff26aa2239f445e33026. 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/DEBL60701381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51485417ab5b25248396efeff08efadac2efc9632a176e0903347d61a7dae363. 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/DEBL60701382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7848fef62854e6acadd2d632c1da45f32fe3c1d240187801e95403bb555f4961. 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/DEBL60701388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ab5175f1950aca3a71edeaf6b9fc8b6b9046e076cdd7764d085cd9fecfc571. 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/FR10S1794637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a3e195ef750c4587d9221753401fd170b8088ca737367d04cf1bdaa29ef152. 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/FR10S1794638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bd5d61c4c0613c9ddc440b7dd72415d4e24fd2473aac3888878d79cff3fa1a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR10S1794639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dd5b8490d0bca77775fbdaee6604cea08043928fd06c86d90500e08f7c4630. 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/DEBL61388405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82955798086e2aca8bb197369cda8d1b112db485b1cf9595b570b5fd1bbf7fe5. 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/DEBL61388406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebb10164dc725daf913b55fbf11c47ca50850ca9353c8824c755072711162be. 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/DEBL61388407.
World Music, Vol. 1 (The Music of Cultures)