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 0x5363c3bdeca4cae7a02a55d11a20d2c1eaf53d968f6e0b20734badd258d2684b. 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/a948733c-68f7-4b61-9759-c5a81363f257.json and https://artists.proofprofile.net/proofs/artist/a948733c-68f7-4b61-9759-c5a81363f257.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 0xee45b782c9323dfd3553c32a4fae46c64f83343d7e9a5debe67e9b7fb947336d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UYS059100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd235101397d873f0204ed108ef1aa2db97ffd520fb98499133e3cea54100efcf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UYB140709005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300331b97b7801a7c10aff1388ecd864e7f30c71c59f60336d8d6f5b85151e15. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/UYB140709010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aa28682cef3b4519a4358ef0b5a7e1347a35e007237c2342f3d4dbc53fa138. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:43:07Z), 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/UYS059100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9401b084a441096721966eafd4195d734420bd4b5279c7c07b2a76a9f1fcee. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/UYS059100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f097348b3c23745fa04d068aab18f6f30eac4844c706a4764d49661f3b794b. 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/UYS059100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebd8c93f1dc0b0cb8be9cecbe3d189e8b45fc5b22e622da2ef655c93b9d99cb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:01Z), 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/UYS059100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73175940a92e4f23db820b591847134ea8a89494ed92a53492768b503ab665d7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UYS059100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac429bacf8d3f5fd8a727050f115475e9a96ca2b53de9cb2f1a14b6fe357cf58. 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/UYS059100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0c9db131d3c72e011e15346fdb78cce294ef30959c46c437da10ef099eaa3a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/UYC120800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281932601e5f12e37fea809af2290f85048098ef7d27f085127e07c76b8fc102. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/UYA130600340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9646e0a6fe90944817f32da2daa77defa7c6c2044f6775c25ea9f21c438f78e1. 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/UYB141501304.
A Mi Gente / Se Verá Que Pasará / La Dentradora
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5a32fa2d71176a47fe99f6e789ea2437d82f17e6c6e439eb45029872175dc3. 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/UYM123001507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b4e5a52cb5e12a3b4f1a7049529bc2030ac8ec7b853b303893985a5e6ebaef. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UYS059300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9646e0a6fe90944817f32da2daa77defa7c6c2044f6775c25ea9f21c438f78e1. 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/UYB141501304.