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 0x7632352ffdb3ec4c59266e5860b4b820fbfbfeaa519de27d2996d4bff8b21fa4. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d990871a-eed6-4fba-855d-63f32ef54e0f.json and https://artists.proofprofile.net/proofs/artist/d990871a-eed6-4fba-855d-63f32ef54e0f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Free - Apolo Oliver, Anndhy Becker Remix
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 0xd71f88d70792884794d68d856b0b70af603e9413450d67056fcb79cbff91ecf1. 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/BXEPJ1900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb38839da05fe001428c270a8d0d9067be06c1df7729bd75d6b789f7433b0b9. 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/BXEPJ2000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf213254b63c753d42b9a31dd28cfdaf44e878f69741f773c9df10a233403773a. 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/BXEPJ2000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67684793348966b300df1c421734b15bdf0ae04ce0d524d65a38339998c4257. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXEPJ2000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb6e5f87b48faaff24e7aebf375134c5fd20c0d3ff5135f725772833d65bf44. 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/BXEPJ1900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12c51478166290ceb207df16dc6fb8f8f399ed036fd562265e5f2ad9656f283. 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/BXEPJ2000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db9e49400b721e6b538507e4f278ea5f863ddfaf15332720e1fc44a61d0fafe. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:19:25Z), 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/CA5KR2416830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3125b5f03353cb5301a5ccd14916289dc843664d33e547d09a36aed0beaafb33. 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/BXEPJ2000272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048caf8dc6711bb6dedc977b76179fe5c0ae69b0afd01502e543e22dd9dea885. 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/BR5BG2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24a63e4452fbc498f8d26522a1778c619aa1cebcd4aea7511064193664be3a3. 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/QZNJY2437585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa8a95a5d7428b62b8748921c3f889eff2a9213ee8fdc271d110cc304a0e969. 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/BXEPJ1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3593d1cebc495b7198bfc8a05188cb5deb7721559bfc65ad2864d0bf56e88db1. 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/QZG2X2402309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dadd6d032d0188a0b21068bd2148810853731118c9df19d8250d84f5099bce3. 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/CA5KR2393124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e8c409ab9a9dcc1e7fb0f498eb5a18469f3922bdcbf3bae65027516d785c60. 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/BXJM41500147.
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