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 0xcd59d779e34d75b9e0f2f6bdd3a5fcccb046b15672de798008f19552ba449753. 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/fa36ae7c-02f9-47a2-bf7c-9da0c7bb9711.json and https://artists.proofprofile.net/proofs/artist/fa36ae7c-02f9-47a2-bf7c-9da0c7bb9711.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 0x777cb0bd5f59f9e82284bf6ae865cacc1f9ae89d6e9406b925c185d9eda92031. 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/US25X2202597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dd4a1da5f5b2810e44e3e31dd0cfebe77d30e19192eeadf6bb0e8770b96f34. 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/US25X2202598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9d379bb913e9c29070b92ebaf3f2dac25c0dcb42ffc0ebe6ec66156d8d119f. 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/US25X2202599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32e81e7aee313e410917dcae873adc4fc0a65a0f129122fbf7b8e9fd1c2c96e. 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/US25X2202600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b564c9a4f9f0435684331c0bf7162fb18e9f4b4b082c8b4eeb008b65fa2aa6. 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/US25X2202601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6072dd14168351130db5018df4d4b847c45cec30683d2dbb4f77de7402d1b1. 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/US25X2202602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bb157dc1a78985327ba907611d819d32bbfc9e0d7b7df8057b493aa7b4229a. 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/US25X2202603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d13101c80f035b1f1f082b3bb5cad78ff62997b8391fe4a281c0640076dcbb. 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/US25X2202604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffd74341985b67af70422121a2c13fe58198e70f1b6b40d15968260a64eeb82. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZQAY2419409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b85c9ac432204706c839a377b55d7a335099b044d88271473c99fab78780d7f. 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/QZS7J2372420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca164af0375a28ea3f05cf1b353cd261335e3f363d2f9cd15a12a7f0faee3747. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZQAY2327787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa181f59f7d2c4a39195d02ccaaaaa11f0a685c4508a68e4e1d944d2ae3aba526. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/US25X2301328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5d031c91c7bd37ab0ae3d5a0978f2d585a6137b7b1c7b311fcc2408738ccdd. 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/DEGC61902130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddb8e87dbe1a56d9fda1bbdd31e863a44557f139ccca3b9d4e1d1b2301ac7e4. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/GBMCZ0601357.
Closer to the Sun (feat. Chauncey Yearwood)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4046614d5722cd7ba8f7e88daf525364d2e41d4e301e7b6a6e66a141165b38. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMCZ0601359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664c3960352ee935da87f04f7b9b7f9955a1b205a201f84b0e8d170146fd8b7b. 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/QZS7J2509901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbdf9958fd89721698ca783e32c7d5429484753043351a71a6093bb7cce710f. 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/NL4BJ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c868cc64cd47c92de0fab4aaf194b5f838b2d659a80c5fdae5d8fac332c78d3. 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/NL4BJ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1bcf856227e2c4e85583fe0a4912bc1ebb3344899d9057e1b4dce3c9601b20. 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/QZQAY2599855.