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 0xfa8e7d7e166d0f0cbcf3adfa358e170a8045771219a05fe4898562a3b1bf327e. 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/3eade738-a59a-4997-8959-616a594d25cd.json and https://artists.proofprofile.net/proofs/artist/3eade738-a59a-4997-8959-616a594d25cd.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 0x45a667967b8ee295c42deb85b2f3d18788e031c25845fcbb6e2c32c19bf7fbe4. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USDXS1904840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708e42561e1a82ced742d4509a429737a2101c7a681ea3609365b8b3ffb461f3. 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/SE5BU2066375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76eef45e8548d8a696666d61004c5349631e3dc1b6bc49462bfa0ddc05edcd0. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/SE5BU2066415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ac973f009a661f3b5ea24bfc45b3ea70ce840dcfb4faa1d4283aeb083b9688. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5BU2066405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708e42561e1a82ced742d4509a429737a2101c7a681ea3609365b8b3ffb461f3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE5BU2066375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76eef45e8548d8a696666d61004c5349631e3dc1b6bc49462bfa0ddc05edcd0. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/SE5BU2066415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ac973f009a661f3b5ea24bfc45b3ea70ce840dcfb4faa1d4283aeb083b9688. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:47:41Z), 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/SE5BU2066405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e41ca90038f2ff468abcf36b848c3b66b335876abc64e5d77b5d7ec5e507d0. 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/TCAFF2061188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3563ff1be842acef212d5501cfd004ae8a7559f577807bdd742bac4390fca54b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAFF2061212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b5478596ca72bbd92abbf451ddf93830b87babed473d430ab4b2533c6f5c35. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFF2061219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac97a9147ed31b569594f9c162d0daf8dbb7f0723f71707d38e5719d673f3a9. 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/TCAFF2061228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187de99ade0c228bfaa67e3c280eac8768c23f9147ee6327ca4e35ba59c0926b. 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/TCAFF2061246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfb800a4162c90adf3d3e005ba58a4d4aacacfe8673c8aee2067710b0b6d018. 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/TCAFF2061267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4554f7264c84d396b055b2bdcefb3a71569ccb6f3e9adab977a4261db2848b0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFF2061276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa69e6a8203c47f6e095393595f1a920f7ba1fe096c46b172cf16b761d4ebcf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFF2061286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d906b9ce2e428186e33c827805d4b82b85fbe468ba14d5f7595eddc42adb8bb. 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/TCAFF2061297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281acc428eb51aea9b6b85ff1ffdeb433cedbf1378e8984408d167e5e55134db. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFF2061306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec04feb89d37df447a9a0dfee1f49a263436d209c2d2e33798fece9696ab5ae2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFF2061323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5b03b99b697770dbc34748d5fc18419a101f8173a8b20a9abe24a9f4c0dcff. 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/TCAFF2061366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc31d39253c708c544c98b5a80a904c286998c797940f9e1c7257462dfb3f788. 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/TCAFF2061395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cb3fcd4a1933279e95d3f8d2039b554c00c2c771746672aa65a16e5082019e. 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/TCAFF2061416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42079c01f50dcab2b4c3696f1087e89fda40bc1e3728657e17cb162175fef232. 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/TCAFF2061435.