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 0x03b28e38f06a6819b20d6d2caaea9994c7aeae386931b303dc74e3b768d6f79e. 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/ce7a470e-4874-469d-8a5e-91b1f4f7f1ee.json and https://artists.proofprofile.net/proofs/artist/ce7a470e-4874-469d-8a5e-91b1f4f7f1ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Welcome To Zamrock! How Zambia's Liberation Led To a Rock Revolution, Vol. 1 (1972-1977)
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 0x3173024a2f562a2d68761237fb17ad33de8cbbeabd9b70887677754bbc0690fd. 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/US2S71747003.
Welcome To Zamrock! How Zambia's Liberation Led To a Rock Revolution, Vol. 2 (1972-1977)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39a6677e43ba41bf0ca891676a78928ae5309ab569820ff5ba90e30d9b46ff6. 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/US2S71748003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8752a957916b2b142906d86e35ea270414f42cd38538d4784035cb442aa3dac0. 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/USBQU2300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cad2ef16ac706a16d4e74e551a9d63238f9e49935c2e8138c82e5d87f054efb. 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/USBQU2200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b4999a71294d5497dc86da5812977f54215f9523d5ee210439078219d6e203. 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/USBQU2200079.
Nshingilile (feat. Keith Kabwe of Amanaz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0963650125cb4f3a2c7b1c60cfe81d3e8917188c6510e9ec55ea568223a1d9cc. 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/USBQU2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56029e80ba916c22083fa7ebbcdf587dd5e8c2c9f89ac2e8e2804d3bb8f018b3. 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/USBQU2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a15f17dce13ae59d646e4cebc8afba0226a0f8c68022818ad68cb2aae3d58. 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/USBQU2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9fd7241a71bddc760ab3a68f70117f9c62d0f3d9654fc833e0e5987896d016. 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/USBQU2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490f21926ce19b2c2f593eb9ac89dfe2ed3aa3199a56e1c5b3c780f6d8a5f7fe. 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/USBQU2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478d90b4d805bbef3be2f19555c18202f6544e9e49a0031867d3b7d6a7fab627. 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/USBQU2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf7e007141ba2df359426105da1e3e79c769334aba9385e1cfffecef03c7be6. 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/USBQU2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d033db8745ba287ce74b9910ae48b4c570b02bff62684fcba626b1e03915678. 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/USBQU2200087.
Unimvwesha Shuga (feat. Theresa Ng'ambi and Hanna Tembo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a15f17dce13ae59d646e4cebc8afba0226a0f8c68022818ad68cb2aae3d58. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USBQU2200082.