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 0x0b8aa78a85812a3ab0c93b53577459d4bc1e87c119a7ab6e360dc8bc1d504649. 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/ff407c35-6254-4c7d-9764-acb8839ef010.json and https://artists.proofprofile.net/proofs/artist/ff407c35-6254-4c7d-9764-acb8839ef010.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 0x0cf0a904a86b715cd060e872f4f64c6d20c29acb05f3babbc747b9c3d5a4b472. 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/BR90B1801438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e749427aecaa3c4448ac848a81eaac9475f93df60788fd323a99094d5a7d61e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BR90B1801439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f88f0eb23380b3ef07da45d98a419ce422bd068bf70caf28b18b7cd6c23c323. 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/BR90B1801440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ead430d0970d5930c4899b03e941751dbb4f670de138d5d0ae4cea7bbdad18a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BR90B1801442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2714dc2b8faf9e44ed8ec87cfd89c8813245da89dff7096fefa1945fc57b96. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/BR90B1801445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe724ef7cb68c8954bca6e84827158bea177917a3143f464ff5f90ce09a6b02. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/BR90B1801452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a55bcad1930cdbc1c302106ccc39d3b614faddcabdb9a2a4054201bf4da18eb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BR90B1801453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa248e5a28ef239d3f103b69e301a83fa758f64fac15dc716b37c104d4c2605fb. 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/BR90B1801454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080cfefee162c9f6b8f7f5ed1febca466cad9ca6583a63001becfb0cdd6da27d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/BR90B1801455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf3aa6a8c07ad7c6cc8fa25f2026b942c949f458c05b21bf1adde4ce902292e. 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/BR90B1801456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35638c04599d6ddc192d98423afe1a0e49777c64d8453898bc7f710bea8314c3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BR90B1801457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0398cd957568824ad3eb1f2978a63fbd73714e8bd9d7d4c61540431bcc8268f. 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/BR90B1801458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599606f252a41af89493194b93651e8f8df673b2eb18967fb407cb15483d098b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/BR90B1801460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172577393954e96000a26d046d731df99ede9fa04318084cac20adefba992eda. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BR90B1901375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f574db7b32aacc75b5bf0064fa8539e9f46ef8e43edfa0e30dca5f714036ef. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BR90B1902403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8819eb189a12c35ad3c538b29aed25f59d136f9a964ea684d7f821f1fa3e35. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/BR90B1902407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135c94ca87e4e23bb1905b6f4aa13a268ce3cf35f004f2156c2c8ffb68592d02. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/BR90B2202164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443977893d4b917668ab2ace95a12ff0ab2c002aed922ecb4496f38f833b5d82. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BR90B2401967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52b116321749ac044b60e5ca14f2adf391885bfc2c2a7f491391020564f1ae0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BR90B2401968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cd58e73f3e21d090641570b2d554e984787ffab516dc48d493b301366c3636. 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/BR90B2401970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460a635aac748d53e2dde39553bd1db159ab451e827b169d308a9f205966f180. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/BR90B2402918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918387289653d32b7fcac19cf31470d45841d2e20033cb5d501dad36396915b6. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/BR90B2404035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffeaae1c2adb382538e829b2d8a8939c3111a49833703f5556a109c171e17d6. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/BR90B2404665.