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 0x311d6ada15215737f771086d98359cb73905385af4b499b962f102e512392f09. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a1b03c7-3178-4bf8-9f33-5d44b4f67d49.json and https://artists.proofprofile.net/proofs/artist/8a1b03c7-3178-4bf8-9f33-5d44b4f67d49.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 0x43b48dbb790f39ae78970bc5701bbb2d855d6611d3ca30ecb5c9dd447f84d358. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEPI82406159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f8b779a295a041eac34da019d9cbcb3f7671d43636a1b0ae1918ad079b5a64. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:09:29Z), 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/QM42K2461791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f750dc16249efe0f038999eee3087068c718ae40c78cef551f6cd1d28a2911. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:17:39Z), 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/QZS642403456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c26dba7cb6c9a6e46506bc38c46a76d63172214bd01c946685867cb2228d81. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/SE57V2404945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448d6f093784510215fde7848aef92f8500f7bef7b1e49cce3d4c400bff546ff. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE57V2404946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13e15102434fc17af74162b9c3d56258927166ca3c46b954266fd96901c1344. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAQOI2412070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa527a156ea917bb73df7709332567139eef48fe0a4a3053e3848564dfb5516a9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:08:49Z), 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/QZS662456744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4018cb7d24d88dac041c846b226d9fda3e2c080b011c777ca297993498b301. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:47Z), 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/QZS672442029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3682cc3606a5fcd16bdfbf973b1db15610a9a664efe2dac62e0a49c2a8cd68. 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/MXA3V2409663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e61398f4e31a411b3d272716381c0da2723c3df181e154bde4fec2b5a6ad0c7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:50:13Z), 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/MXA3V2409664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1efa4ac738a15a6531ffee0faf43f8223e85871a391789028781ca27d349b39. 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/MXA3V2409918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d44fd4dfe0801aefc9ba8d7fd0c1024ef93d3c0f60bb9de52fa7518aef0d8db. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZS642502049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd72bf1cc0cc01b37bcbb391f48aeb2efa4809c96404ff3379a183975954dde. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/MXA3V2434836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf114a281b17fcd981dcbd783da631f14d5a52166cf8dd785dd1b3335a3e4c4b9. 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/MXA3V2436700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcb3dc930614fdb192afd63b7869fb53cbc568c2b51922db13e8e4c7727601a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:01:22Z), 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/UK6822512890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee034304bfc74432cb0ff202d0fa4752b035fcd4274650e66786a5129462f36. 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/UK6822510900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c7fad0939b49ad758b21999c81e2fe60604bbbdc4afcff32e5deecc47b0545. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CAQOI2529230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296a27ed6baa8548cbf3df6d70766f5cc418d212bdeb3620a37879d8ac63b9d9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:08:28Z), 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/SE57V2509481.