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 0x292540f2407e359737f2c271c62ab86f909231d93a6008294517a31274482f51. 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/e422a2f0-8ac2-4d14-be79-a29d2ad10e0c.json and https://artists.proofprofile.net/proofs/artist/e422a2f0-8ac2-4d14-be79-a29d2ad10e0c.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 0xd6f9ec1982c9c8f5d8484cf8c7b0f9e82c9aa85b2f7319b4b23ff68214869725. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ZAUM72500632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc683451b0f94bfcb320e672d02a9da56088509425fe91a62ebb2e96c824b4143. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/ZAUM72500635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566a7d258f440ea2ecd0fba517d275bf46dfdf00e72e5b735f813e4c46373577. 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/ZAUM70600298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa203094184f1349054c56cf13bac2a4701c6f2adda11cb059468208fd53464b0. 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/ZAUM70600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6658f61a4c22e8ca3ab2e11faab31d415e465bad4b7577126c21fd3f9a0b95af. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/ZAA020600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8f39d69339674ed6ee93f5c0804fdf49d8be23059368fa307dbff1bd31c5ac. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ZAA020600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64c667a453d0c546de7b519a95094b005e910d03dc3530d2338ed782b1cc53e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZAA020600148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3fdfa5b20d5df944d3f335b11cb63c93234ab3d5e2614cf448c0c4e2321af2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ZAA020600150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f02dd481a73cd0cc5a1f4830c94037f0b4f171334fa6e35cffa31b35cf583d7. 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/ZAA020600151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc48d19a1a331412830fd777c06038d4c3e4a9ac1ba1b4efc6836ee3eb385085. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ZAUM70704830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b7cb2943c746f75240651f85f3ef6d912532bd6ee2d44a76e36763e43b7111. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ZAUM70704827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4349ffaf8d9fcf25c0d833e55b78cdf00c6cbd3e925d6c5b7571f304c7e9763. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/ZAUM70704823.
Live at Diepkloof Hall (feat. Diepkloof Mass Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87582b76c2f678aafbd12f2a73e938bb1be464bb2529f23e5d908ef8cf9d50c8. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USV291414516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e05b2731feb48d3e4e10c3ed920a4322d7588874913b7cc76c9a78ee98c4c7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USV291414517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f2b59dedda289e6931ec82fbd156bad36e6ab58523f5186a00e7e9aeed9943. 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/USV291414518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3a009a2581c0c1ff88c493b1e054686466d122b8d9b177c3c61439fd7bb013. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USV291414519.