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 0xd6c6f6089bab9232657cd358f441419da11ab37000eb60ef8a00ee8849bd5660. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32af4403-4303-4b92-8774-7d893b7279a1.json and https://artists.proofprofile.net/proofs/artist/32af4403-4303-4b92-8774-7d893b7279a1.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 0xa50fa54bf8f580cfa09359bbb17f15111f76cb2a005c248372c376bf909cd7dd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:31Z), 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/QZPYN2109499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59773dcf3ff43b18f39035ebb60cff67a8c6f2c077ee019c66d36466cf7f7185. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/INSB92400242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b363094b79c3247453a68a555cb78bca589f889e8ab63dcf8147573245813a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX762475178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77cfab6857b2d2e290c9ee93276988e54dcec3e477d27c505b971fb37dfb4c9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:22Z), 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/INSB92500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec0967763a03a846d327d4174d0dfd902e4433ea3b1a88ffe2c2016c9e952e6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/INSB92401193.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b84910d29eb1aeeab8ccc14e1075e78bd85600d26e303596db90029d50e5cc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/INSB92500256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ee0b474b9854a27e3a51bba3d426edb19b5155a90c80aaa1d5b2f31bbedd4f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/INSB92500328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378ccd197f239bc13db5b24ad5b91be5b931d85b22194593f27beaadd33a41c8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DGA052545866.