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 0x03fd37ec9d83dfeed3e4726344eabe8b5d8ca5fad6f8f2ab8dfe32c5ee7f9d8e. 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/e1cb3798-6cf0-48bc-a049-9335ac535219.json and https://artists.proofprofile.net/proofs/artist/e1cb3798-6cf0-48bc-a049-9335ac535219.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 0xe118f578dcd728d1b6a1747550285b3e25064060aadc6b777082a7ceb529a4b5. 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/ZBYZ22300002.
Nhlitiyo (feat. Brandon Dhludhlu, Jay Sax, Omit ST)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ff3f54dbbbe0d96e900353bd280fc2654bfde616e948f5006ab729317125b1. 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/ZA56E2315055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74d2af90aa49307d2ae071ab62ffc0f101ca873aec57de230da9e29b0bc9e69. 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/ZAC012400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa6b6f9e9b4dbe81265196c7156cfd465c54e1e45f353222910a5299a53cd8d. 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/ZAUM72202631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8321da9052bae15ddf2d6fc0c1b78cbcad7163f1371019b4cc97f27775b16a69. 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/ZAUM72202633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8bf386c230accb7b4eccc794b4ae65b2ff80041890b47b3f731d4dd6a4e887. 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/ZAUM72202640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4503c0b1330098772d36864a657de8ac2f749ba6e6dd80d0fd44e81de84678e. 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/ZAUM72202642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2159e71caa0b52fd53479f85ae3ac75a1f1ac2b1f5e2ffd4d48ef2c28c237b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZB1OS2400294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526b78b78c43e2d2a8bec121537e0aa32dd56f35933877f5c09ff83e6b92011f. 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/QMBZ92494869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad2468660a68ef2da7023a39eabd4ec8a38ebe3d11d3ee34a8d37165a62cbd3. 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/ZAC012201336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df04409e4a2e6b1106ca5ea51f2982d3c427073ff3f59663d20ff6870d9340e. 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/ZAC012201337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1e024fcb0520c707d6e72c647df2dfe73900356b9fab853dcbf3c6f81011aa. 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/ZAC012201340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e5dc239961ae9a836ca66877f6a3c7065c01b2ce93e39dd9f3c8d269dfcbc5. 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/ZAC012201346.
Shona Malanga (feat. Omit ST, Nkatha, Mathandos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525678ead4ffcf261926d38cf9e67cf659aefdc98d6a3f01126fb6560206da53. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ZA56E2415706.