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 0xea3a71819891a56d6ffcbaca80d25a408b57bd4ca83b4cec113c2a7904b40f5e. 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/56245031-97b7-4515-83a6-2d01f8c63fa2.json and https://artists.proofprofile.net/proofs/artist/56245031-97b7-4515-83a6-2d01f8c63fa2.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 0x4de974ca4acb86e329d490c0620979573f84e2da2905f0ab608fbf41d3445c5b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SEYOK1665658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bcaa227cfddbfca9ab44b05eecf5b865703c310bee8fb54c4756701e73fb41. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ7G71700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfeecd845859109160512cb5deaa131aa459280a70d4bbc9c48015a3f30f9b2. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZ7G71700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7f585869006dde97b7b9acc4f7dd34abf96b15e1efc2c1cec10a8df914f5de. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ7G71700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe153118a5194e774c54f0d25999c20c7c186b9127371705893d25e38f3300d9a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ7G71700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973710cafedb8757d1475496b52d059ea3e4414164c881c7d2096005ffc1f0f6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ7G71700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96f51670a2449ac44e5b6dc5f8e0e1b606c63a470d2bc85ebe00918a03c938a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZ7G71700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5febdfbbabf8f244b9f5214b391c6a7d193dcdaf4d95a8381726fa37d55d98ca. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ7G71700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7542d9b8972c1a1d83b6c4cd79def2d680848e7d7737a2c3632dfd75783fa186. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZ7G71700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52847fe537e7f12c8fc428523cc818da193968aaeec5d99786578f43896639ea. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZ7G71700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74e866308ef82b7c11cb55024616c251055cb0bdca6fc862f953d8d66caabd0. 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/QZDA72041412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952ef759d3b147d4efd6128da2ed791522f2c2f571e526488487abac5815a7d9. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZDA72041416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd9eb6be51b554ab176fade32cc4594a0bd426bc5c5cd45e7b6c998dd7b4bca. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKPL2299893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d84c60a1e68781285a6f8bdea52496f81c9fbc8ff8ca94918087e868dc2cecc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAHD2389561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0beb47464304acf276bbab9fbe6a51596d6a9fe071f79aa20f5f539f83eed316. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIC2407583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8d3f1ee8d51ce95c89c7491946ad620e4c7e0d1b2c316f8f25c6cf90d8fca8. 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/USUM71820937.