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 0x7e352d437be82cb8fb624f4649cbf8b25a981e7233a775e173fa3c14501bf37f. 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/ae1b1263-17a6-4555-a922-764a9b57d22a.json and https://artists.proofprofile.net/proofs/artist/ae1b1263-17a6-4555-a922-764a9b57d22a.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 0x0d9eac3d661233a030ae5a443add7358e2a69bac5dadfac7b59b3f01c4f6a512. 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/QM42K1923272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f028482bfa1be3cb0966c5e1dae0b8ba855bb4ecf9f994df80602b4654e0cae. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QM42K1805490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa41c4939e10abcd4f18ca03ba1a7ff1c6c9a35cd014cd8334ebc4afafd5b390. 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/QM42K1991714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586f32a077e4fb17158511b911b859afd99819a7eff8694cdb06594a1b714617. 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/QM42K1877669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485d600a0e73d88dcefef390b5cd0ae78c34a7b9709d12d8d1849d90eec88cf7. 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/QM42K1943861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ff690d5b5b81cfcb32bf16299fa21ed26113edd39317b062247874b87aa674. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/QM42K1814299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124ea461a2c8c93754b7670299db3a150f11c773b1b89b6c03d7a1b9639dcdfa. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QM42K1944480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f38f78440fd038a1efa4af60b31b9a0092f3990a4962b3f8eda3edd654fa37. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM42K1912228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f6e0af9864fa7c3be72cd0fee1bb263e4531fb13022fe15b6a1a79849df3be. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GX53U2401023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa0dfa3dc8b59ec42c12cfc4d5695b688ae8d5bde522246b38e0a1b3e23c61e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GX53U2401026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577914e05ad05a79db140adb6f46ac493c729e5361f1247d2ed7052d2edc1dc9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GX53U2401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b664e0a1fc2120c6ba8094f391ef81e6f48cff5e387d8a4c40cc1d2a302371. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GX53U2401032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6224d0a1920a5cdcf8b69f06f0eaecba8ac59c038f3646e377a7107045a98983. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GX53U2401021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf71d4930fd89deb6ebb9e20b669a2ebcaee24ccaae683ebee0ef6c256d05a25. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GX53U2401036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74814ab945fa7688445f9aac5c67a8ee3381d2513ae1d6a3c4ec10927fb1219a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GX53U2401051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35e9f76f36abcf264a92bc49133647e159c32c51e7e8935417002707356be36. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GX53U2401049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853ad9117db5d21deb75001a88fc35f8bdd5fc966dee6b90797e5b82c1f8d00a. 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/GX53U2401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaece0596433375f5a07a1df06c9c345602d0b6e66fcb92cc184d7de87ae1c76b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GX53U2076579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e9ab344a0cf2f5477a1c40da1a766cea0d65c816cba08d8fa57d7e30802cc3. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GX53U2076580.