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 0x0e4142e6ec74bda35eabf43a49e2a05926a42a02c8507fabd338672ff26cd1ca. 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/5174da7d-85a8-4aeb-b65e-681b614f2f2c.json and https://artists.proofprofile.net/proofs/artist/5174da7d-85a8-4aeb-b65e-681b614f2f2c.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 0x657190ce4ffe2f157b6af178cf8911281e7db8075b6207d7585e7671419f26ad. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN42079920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712c4aeb746a8441f1cd90d960de1a99a4dae231c1bf89a30ac3cdfa57bfcdfa. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZHN52074970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf764ed050ba8c706b2b794da7228178a514624b5ccbf2af9079b999d05c862. 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/QZHN52074971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddefc5fc099c71300b81f059a7042c4c125969805dfdd8a004a808c55116c37. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN52077396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d3ae204d23102940df4a2b16f0bf8c14da26c15cfece0d93493a1e13646624. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZK6N2057594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ad19a559b12558c3095c2d7d521cbdb74a2a03593ce0c06a1d83ee6524671b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:47:55Z), 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/QZFZ72154634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5847d12cd54dd41c6114eabe3ac3680ea99bcb72d348f5e9028d028fffdfbd6f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6K2169666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fa42d270d69fa6fd82e6f867ff1b7389ac70c6fa3ba6f7d3da18efc85bf311. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEN2208882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeafb229ec1e939abdac6070afa905f59b600c7e7c9bf52a4a55c4428f68cf77. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:34:58Z), 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/QZDA82324652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf077018097686fa8d9296fb8b0d05c3e0dc04d2668bcfad32289a44b5a27ffd. 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/QZES52469995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092b6001ed5843c3fb6daa811c36ef0e159c0e8acf7834f87dcb0b57cddbeb88. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZHN92412210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe204b360ae521edb5d16ec5983e02874fc3ea03f667ad703edb1914dd3aa2444. 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/QZES72599725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8f9bd932ea3f12cac8496bfd32a673bd517c01ffb005796afa0589f35b2565. 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/QZES82532040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c0e039bc5fd8ccf3ee237b919a240068dc6b3d8481bece754d5c9eebbeeae. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZHN82548628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a527b8f1dd32a0f46ad88e2b7f1a02932aa7cb120df28080faba89da5ad0c9. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:54:45Z), 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/TCAJZ2516925.