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 0x3c1836f583f25aa639fdaa3337c4bcb33f471dcbb4c747fde866c94e5b3e5d0d. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3274c758-42f7-4a19-bfb5-042b27e24c25.json and https://artists.proofprofile.net/proofs/artist/3274c758-42f7-4a19-bfb5-042b27e24c25.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 0xb41e4d5359035986df154a9512e1f1001eea66bf7ddce296761a10f224d2bfe1. 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/CNA231400464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fc6bf5d25bf9deec9c9bdc2844ef3f5f5c43347f21dd8cbe88ae67084e6431. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CNA231400463.
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 0x488e5477dff5ab4f4f44e169b68ee0840ed8c8d4e056b0b39131885a28621c71. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CNA231400467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832fb653a2ad93c084b9821b9d244e5870f5fae7410146ecbd4321d443b9e655. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CNA231400468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef69870bab6e025860d873ebebd39b1352dd4674d9b15c684aa2654009a9a72. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR10S2243428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe680a82a6fa35f22dfb79f575b308bdaca4fb30e3b6b54cb4b5059c47fbac1ff. 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/FR10S2243429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff47ba9e1f75b75d14ee9aa140208f1933128c83a5db9305c1bd4cdc6f6d8e6b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR10S2243422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1cb0bd2cf181c596d8e404a80c0daa4ad86485cb28df7cb870fcf63db64fee. 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/FR10S2243405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12715c63b01f5eb752367884b199f8b7385a7c053c1db45c820cecce67a47c16. 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/FR10S2243408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902a1cb4c09cc480864a0397853688a2e3e4b89d851c361688ad1ba7a66ff39d. 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/FR10S2243409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ece00f676296ff3b160da25a61c635b6e0078c0db2b2c1bd962bb7e08f6f889. 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/FR10S2243412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518a44b5bbc5967cf30b839a4238aed88a5749607f0c809adeec0921c3dddee4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR10S2243407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae177503fa8293a0e010d84af01e2ced0a69934882e28c0294d8ade9c945923. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR10S2243410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d04c28f0c596d7d7620b79074a5c9f0cd0a78ea28b40c53ab140f1391161304. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR10S2243415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9752cdb826d9870418fbfa7d6a5d8620b05b5215b1ea9d5126b978a4533e7f. 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/FR10S2262407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1932dea6ba8cfd97c217c37cacf7ad4d26fc647692d968068ef2986842417da. 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/CNA231400458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7abc01939af19688ccc3e07d197f65e2f3264091e32fbe1e062d6300d45211. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR2X42226386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704fe1ed622b8fc812bd745ac7614fe023a2b234358b5bf6f1833e2254aff471. 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/CNF122100867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ad6b6496eb792ceeeb26e589762f3befe3cbb9b33609ddb400fa924e6ab332. 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/CNF122100869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e437778b7ca317f9a44a8d1c2b9daad9f5feb0a45a6178911c4d35a4370c995. 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/CNF122100863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6116f6815bfc086eac70083886f080a11579b88ca581a079f0b7ceb0c09abf8d. 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/CNF122100860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fccdc6189b9d8dbb07a635bc2dde0ea9ed04623dc54a1b8226f569660a49a92. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CNF122100866.