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 0x590d44e16267540111747b0c1916e0e302311ec50bb37a0f4266f7015add9573. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd1664fb-b0c0-4b1d-9b91-8f2939f54f46.json and https://artists.proofprofile.net/proofs/artist/fd1664fb-b0c0-4b1d-9b91-8f2939f54f46.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
// this is what nostalgia feels like. (other remixes)
// this is what nostalgia feels like. - another slowed version
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 0x291a61c0b533c0b22c03a6d6963d934d4955afa675f70b76dd8d33817f29706a. 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/CAENV2450479.
// this is what nostalgia feels like. (another version)
// this is what nostalgia feels like. - another version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d4fd52e43e7461970dee24ff00826c2789861e61a94621819a0e6f9c6237fc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CAENV2450442.
// this is what nostalgia feels like. - another + slowed version
// this is what nostalgia feels like. (another + slowed version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb5b875fd0d71776acf8f723537d8d8c8ac4e9280980786ba28c3a4baa41852. 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/CAENV2450447.
// this is what nostalgia feels like. - another deep slowed version
// this is what nostalgia feels like. (another deep slowed version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca489a465efecb7dba844b5cb616ef74bc8afee592d3452d7e8c2c7fc1a54fa1. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CAENV2450476.