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 0xaf8109dd3facbf0e26521f256b8207aa0b55dd6a5c29a820ffa0aaaa5e4384db. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8aad3e91-6d4d-4d7f-bc8e-d27d542ad599.json and https://artists.proofprofile.net/proofs/artist/8aad3e91-6d4d-4d7f-bc8e-d27d542ad599.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 0xc1a221f0cd3df5c7853b51e591abbea9f5dcda61321ad0bf55ffa8bb523fdf15. 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/BXKG22200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb768bdbae311de11c5466d9f32a99ed0f5264d13b626431b84bf74e19a95983. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXKG22300984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43598531bfa69f40cabc559804c6374594d1fd9ea8fbe49b38f1a24aec1f636. 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/BKBSS2300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d88d3a670025c255052d9ce86341c4f4d8e5971d165ed35ed2ca07a4ac7c7d3. 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/BXKG22101252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4324a170f615abadb63c5227b6b2ab588c1aed4be51a9c74c0f0f7586ca51c00. 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/BXKG22000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690f3530eb30bbaea90e200f05894f05ec962d28c68bd2d0ec7845d41db1bc5c. 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/BXKG22000231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeeea10f3aacc360200bc1fc85166f5a56a8475d75f32d558a610666b12db60. 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/BXKG22301653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcab3ae10a4bc735810cb569537c96a26f3b896bda7ab9d4da35229a03b250e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCBS22000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185120fd7d10eeb084e5ed07fd83792e4f34ea10d495a4e7672d38616ef781ab. 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/BXKG22302556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185b8c8538451d21a5b705d0c0ff6518831d01f81faae6f3e1c55a6e5a293be7. 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/BXKG22301866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a788c670fd0788ee487b013748aee4d71ce1a5e979e8d8942d2901bd936de28. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKLY42400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a0c0a2676a02b66096c0f8216a035dcdb44a21732364dd3239f320b84bb717. 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/BXKG22201073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08ea8179815015a4cbeb39baec3affc84ea4a6c2db64207c682db15c42c0436. 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/BXKG22301500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77570c27db0adefac64346e99ffdc64dc58acce5a58d7b72c47459c36c195996. 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/BCSOR2300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45b1f77c4c445a29df2cf8d2c2c0d65df0fb572f9ec1a73bea0039d765db853. 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/BXKG22300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa518f25b54a29514c7416aaa289c7584cd0087621d3b8cce546d248e4f63d351. 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/BXKG22401483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571793ba36122a575751a57d3037de86a9df681aea55c4e7ecb2959359c8aa04. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22302792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2b2d68b181ab8fa804a14784cb52c9ee9fc09c5904a5a272a06b28ab9e8d3b. 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/BXKG22201374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1b436c484194439483b28fd326602dc2d8bba45d4b002c99ab5a1c554bcf43. 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/BXKG22201309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb456374f6c8baefaa1fd628060164ec148e0f578afee1c6ff13662826a2c6307. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/BXKG22401192.
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