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 0x1005928fe6c02f4c9308a95fa33c4d14188e9dfd5a87c5ebee59d3a712700873. Chain 2 (Bitcoin): anchored in block 954032 (2026-06-17T01:59:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3be6f617-174f-4343-bd25-6023b1660255.json and https://artists.proofprofile.net/proofs/artist/3be6f617-174f-4343-bd25-6023b1660255.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zimbabwe: Musique rituelle shona (Zimbabwe: Shona Ritual Music)
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 0xe7ec62054d33bbe4825ecba4e5ef546fa4cdf3fd3b995bc4ffebb39080e9ce70. 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/FR6V81831592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c2469c3625337edd858db0e112a9306cfd80fbaef6c5c104dab702a77e2815. 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/FR6V81831594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108357f929120e92f1c998e510b12c2e175d02ea5d4f9cef9637d32116283bb0. 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/FR6V81831596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382f65c3cb23b89d7b73c0b48103d2d9bbb454d2ffb87c62653aed570cdabaa6. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/FR6V81831598.
Moyo yadzungaira - Nos cœurs sont perdus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0752d78c95b5bfb60f25f065f392f4d1e4870e11bec74092da90e5056b81de. 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/FR6V81831600.
Changamire mudzimu dzoka - Reviens esprit de Changamire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0643e2fab32518abe98a1e7ff501233bc794d3e6609418d1f3821841905122f6. 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/FR6V81831602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8bbd835559ebf2609a25234d77cb710d8d0d600231bcc8e988b51b131e1dfb. 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/FR6V81831605.
Changamire munoera - Chamgamire, tu es sacré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b35a8f15759ac9b21a2ae6c53a2b4f7867ec5b92b98fc5b9194f79acbd325fa. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR6V81831608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988bcc1d567c11d5b55d091211d693270312d8c652fd7f8db5acecc57696a6a3. 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/FR6V81831610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677ad2c7056378d2db409719260c313424d96e1badaf17ea9d337ea8ba768732. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR6V81831612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704e178f610c7efe58a4c2cc3005ba3c0abec3649d4b98c85c10a4982946c2d5. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/FR6V81831614.
Le monde des musiques traditionnelles : Du Mali à Madagascar, vol. 1