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 0xf6c2d6781893f4c8a1fb7ab9ab30754dbba6a7729da7385a914bc94146b6dfa3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4bd3041-2e47-437d-98ff-ba34721fe7fc.json and https://artists.proofprofile.net/proofs/artist/f4bd3041-2e47-437d-98ff-ba34721fe7fc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354f9aae326768f1ee7bda9375f3112f6a9e5d9ed4430f7f6cd94fc31c3c7c93. 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/ZAUM72202525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca659c8d02644b26cdec150c3040fa85c90ae14107063a36424688f0e215e30. 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/ZAUM72202521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cd8abc810240269c1ebd4b792f86a3d7d85c3dbe35c57f6d44917e39b96908. 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/QZWDW2484236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bd833a99632cdd46022ca46d78e99e5bbf4ed1f4b5e4005099084b01b81aa7. 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/ZAP5S2300009.
Ngowam (feat. Makhanj & Nvcho & Tyla & 2woshort)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418fff6cb14bf1af4b31943e32d45a95c2872805e9f5fd01c0f755d69e084ee4. 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/ZA56E2201742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83155c56f6680925b2b07d693044e33b9e39b271aaadd07c84fec574ffd40020. 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/UK43Q2481504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038bc5740823ccf0cc0a3e8c58060a07ae3854f00213d7cb52ef56cbf83efeb9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:00:48Z), 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/ZAA012200291.
My Lavo (feat. S.O.N., Raspy, Zadok, Nvcho & BoiBizza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359098980fcf3a44858358c85f255b9e16d11d6ea92e6fbf852d284c9af03b18. 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/ZAA012200293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bbfd87209f35a1a893b3474d8bc89bd166592d53039a5475255056bae461ce. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZAA012200298.
Duze (feat. Sino Msolo, Mr Brown, Nvcho & Stixx)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3791c790eb549a08b357c48ad95ff527b0f2b1f90dc35afef53b6a8bf3b7bc45. 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/ZA56E2416482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5348ec6655de7b932f96ada74db97e03fe779420ce0a5541a9e7e7a4420e4ab. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ZAUM72400830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317203641f8b24a02581e6e16cf0c5f52eca74c001e77e9576cc4f07736aa632. 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/ZAC012401375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481f8b744e817f55b4dafa2fc983060618936213a9ca1cdbc4dc2dfcc142bb86. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ZBLRZ2400008.
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 0xd5c0697bf3a177311db56e6aacc744408d25083fc9cd37e8207ac9c830581fa3. 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/ZAC012200695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0102c745c17d64d34b101f888f7c5f8e3fa9d52b644be147666760b7e363f6. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/ZAC012301437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36e5b1d6712c9e02b865ebc4a21d8f16c0aa8527ac5b30530bed630706781e4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ZAC012300891.