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 0xc221f3885caaca4ba76663ab9786650795b0b4c5bea67b142c69eec3276f2eb5. 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/5d0e3199-53aa-4a8d-88f5-f99a38a4abd9.json and https://artists.proofprofile.net/proofs/artist/5d0e3199-53aa-4a8d-88f5-f99a38a4abd9.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 0xe3a9c9847aadd5f5313d3d77c18c473b1d507559896943aba138e0bdff21da0e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GB8KE2329468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498414d8d61f9a235a5499fd6f6c09e543c544abea284dd1cd11f7d5e818db95. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GB8KE2403026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2698aa2b5802991a5cfcaa03778afe579c79815dd5cb169b71eaa4ac553804e8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GB8KE2404788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2ee21efb9e56677e9ed267f933c9f8cd2fbe192779c9fd10e58fa34e9485ad. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GB8KE2414938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553bd213706434780ccd8854d0699063ebf33e7eddb79d7c2c5e374a4872f2d2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GB8KE2417691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da4ee7c9f145cfa0327f8e4f6bbc9fc501dbc7cee2f5e424493e608ee8145a9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GB8KE2418589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5f3ce636b6c70d24cf9a84bef6dae3e3d89d0da34f4a35abd00fc55390d715. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GB8KE2421748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936c8acaa05e4fca1c33eb966105a80c86ff918cd3586ebf4eaecab877d14e4f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB8KE2426169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec248eb7d37b0f1708aaff7684e345439e441c331aa199fb3ec9e72cc4e5d77. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GB8KE2427578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6703ed621ad133e39f8b4d24c68a5426d82520025d406a3a205460edf1c5de8. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GB8KE2428945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5e23cfc02bf3a62e3e5e2ebaab884ab479c69c329fe189c698874ba58799f0. 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/GB8KE2428944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091a14f792ef4afa6eb1404543566ec564cf2e77ce2ee3c266f0579da0945321. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GB8KE2428956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53ee6065803a2822e2ae3a3ec770c71fdc23852b840c284c2cd3fd89fa9125e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GB8KE2503154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6058c1cfe56a9969511e16f9a4ab50243988815987a556d93f3f63b8c555547. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GB8KE2503861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ab1896e329e1d1ba5846d95a92671c0e8cad6b68c46c257b20cee655fe672c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GB8KE2504938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e728929a75b7e71512b0368614b952c39ee73a69419d6e43bdf673739b7ffa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GB8KE2507290.