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 0xeea5f634dd5ca4d672bbefe70e98e5d8e1365b2d4528c5f43697aeda3a9f46ed. 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/6272c7f2-db88-4fd8-aba0-f4806b627ea0.json and https://artists.proofprofile.net/proofs/artist/6272c7f2-db88-4fd8-aba0-f4806b627ea0.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 0xd3a32a0c489478d58e4a00be0ab5f3946648382926a5824f7ec3f1eccd88aa83. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZS652264004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a32a0c489478d58e4a00be0ab5f3946648382926a5824f7ec3f1eccd88aa83. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZS652264004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa049b58fe97b8a917cccbbb469be98851f38dc31b150c6b8a40bc7e6b9b78c4. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GXBNP2420047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa779371be30c22998667adcd09f5c9515dae6216965b262312f9ff4ffaf267ea. 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/QZMHK2439776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874994d43451d8a1fdd8c31cb5e98bf506f3bbb1eff721f142099238d586df61. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBKQU2443526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79896aeb1bd2e52b28874f21a4a806bae801c4d755ea29b7594204c4fa3de280. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBKQU2452012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372ccc2571ba1b90d378c8f7a83d0018634f1ef767abe4e2351046ef785e55da. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:04:47Z), 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/GBKQU2476009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9fd796d64c3d91510a44d6c04c5de0f614bfed5f58f2dc8df0edebf02896dc. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QM42K2434733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813a1faffe986686c75dab890b3470d3f964e8747e59a9b7f1832b1b689e5ce9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMHM2534759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee43d84433fb31c78e38ab78e3c93fba66fce20bd60e3b0a061d8aa8de198837. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZKDK2536563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213109d5a71fd8256c13e108ea2e23bf786f03a0a4b3dd0929c05eaa94c0df7a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:02:05Z), 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/QZJRB2503802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28e5db3c5f143c43b99dc16d3421274b26dabbaba484f2a4c0364ce95b98200. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZS672546874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0181cd13cb59f95093632e188db135f43bc38ebd4abcdae9bdbbb26e20d71e. 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/QZJRB2582003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d521543d7c2410d741644964f94ba3e0981d345b47a74af99c3a5763a102bf0. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:41:54Z), 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/QZKDK2570317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508a913dfdff9b527cfa7be74548239e0d76fb99ae2f62831bd1091f446c1c47. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZJRC2563123.