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 0xc2fa267656301ef32b7ab92356cf273de8cce2ccb271c621e19203863cd9c600. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d213322-cd26-4c27-ba59-fd8a1498e14a.json and https://artists.proofprofile.net/proofs/artist/7d213322-cd26-4c27-ba59-fd8a1498e14a.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 0x8ea18172bc6f152a5ad3b403026af8773a3a91d59ed10b4a7d04668677396e9c. 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/USCGH2334067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd6a6cf1b7aee6791c31c8f3bff5266390ce0d3de64a17915ad51090f47f91d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH2334068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf992bd540c1d548a5d94f09d9ec46827cbace40d7abcd534d638710e16db6250. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH2334070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cd3515c1e790fde1c41d32050befab32164af9a5caab8b642bf55175c99c38. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH2334071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77736cf94524b52b2ee3b6e473816a29cde2ee1e7cb9bb11ebbc4935c0b7b67. 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/USCGH2334072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a4afbf8d89d0bd0bad57d4d350be76b1d4661e033dea9b38fe0401aadb7e6c. 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/USCGH2334073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc14877d2bcdcd2108c22dbaddc65ce3f9ca2660b466c40e23640c80995506c. 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/USCGH2334077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba844c351b1fe686ac0a88de2fd6f83ffd11c7f92020f9f3eb1298522498dfdb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USCGH2334069.
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 0x99437d4bf8eddfc92acf86ab1fdb446cd8584f297b3f045d9a1d30d199662953. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USCGH2334074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe184608ab9996f275493222b0861464c285431165dbe89722625c93e333df20. 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/USCGH2334075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693abaa888ac25835478e97e15858291eeef9757c7598c0f3ee5a3f706ad7138. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USCGH2334076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04c0375652885837358d31472a3f48498a12c9541d48e7effcc324d74bf6f56. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USCGH2334078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401e5c08f0430f4bf6ad63528cf6abe0c68c3111462adb3eaf1a273162472e8d. 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/USHM81967671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6d273221f617cabf426dc646882a0f7a20cde0bcc88ba2af4a41c1ba9b0933. 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/USHM81967672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414072cbdb21ff4fd2d43bf1053ca1d966f81a05780d5756cc87291c927dcb44. 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/AUMEV2426610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f4643059c451b0ccde592929c0e5c59b971f4b2136ea44b7fb7c96751a5faa. 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/USHM81967675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba246d99ec08e170dfefc2ee975a8c205d0174717c4f32c07f6da96090aecd95. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM81967679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0e5c7847f29406ea8ecc4c8afe7efcdff2d1b63e1b70b2f27a3ca269b34b61. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM81967680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92cc645ba762eaac54ca5dad0609e68ec9f8e76bf191015f27d2c0612c7ef0a. 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/USHM81967670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a39d70bb54302d0837ac895805757a04288ce434fea0148561b914091e1733e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM81967673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ebb342ec37d5957a7b1118901d59451ed101617af1088df4ccd963e07e96df. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM81967676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29cdae1d50f2d4de81f0507cefd02996e0c7f8ff53d6174db069b0cb74cdd6c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM81967677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3b34ee2d8f98a99412f288128525cc41be5aeb4c11f6b4cc7bff2ec26a1aa8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM81967678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b22b7a99201860111c07585304fad7628e25b41facf7ac565dd3c1de7df9ac1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM81967681.