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 0xb4893fff622940727df280a7058f886ab84d46cdbab742fd4a2d378874da089d. 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/26040558-259f-486a-a721-cda9026c31ad.json and https://artists.proofprofile.net/proofs/artist/26040558-259f-486a-a721-cda9026c31ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Love That Remains (Live From South Eden)
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 0xafe7c2dcadc419afb72d9a15c8b0d624f64dcae028ac2770ed53d797e1164f65. 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/QMQ3X2001306.
A Love That Remains - Live From South Eden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c81f6fb1403c4d95091c7048d73164a0be4e9bc8e5aa6df8c70f86de6438540. 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/QMQ3X2001303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd25d526ca99f033f1981b82efb1e07ceb3313cc4f41c4c2e2c15e3aba09412c. 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/QMQ3X2001364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a3ca1078320745cd2ad311491ff121827df6cfbaf30448b5b19e31bdfe46ec. 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/QMQ3X2001368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf0b7dc73de48c0ca2804473c0bb1602c88bc537f640e4c2f70165545cad695. 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/QMQ3X2101432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ade8aa48a527ddb2c5e24438b9481ce4dd079a95fb85758ccc18449955576aa. 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/QMQ3X2101433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8a84b5a20e98cf82c1b78e0f59b92306bd78d0aa2c122154e7c6d15d57f6b4. 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/QMQ3X2101434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639eafdc7ea14239a330a22fac4421927a6508205db42bb0c418d421828f3bb1. 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/QMQ3X2101435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc517615bd28f715019a470029440967f0af6984202e210171fd89b5cb8fd25a6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMQ3X2201523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d99327e56054426793386fdfb176f47cb2566ac2318665924edbd8d02e80ac. 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/QZZ662446588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7198aceabb1cb64965999d7a779609a807e0596d0f0ca1d34cd15daa19867281. 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/QZZ662446589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd8af74c65309c583ade1b090542f794c36cf6983105848e3ab05a27b01843b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USM1C2100119.