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 0x4773ec15fb88065522dd5e135d8fc3603004ce253ca3b8fcffc68b904ceb61ec. 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/e6de5b13-007b-43e0-a4c9-9f5180d891f7.json and https://artists.proofprofile.net/proofs/artist/e6de5b13-007b-43e0-a4c9-9f5180d891f7.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 0xcaadaafa1542759f2de5354192c64367db03e05e3da7c80fdd23e32b8e777738. 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/IDZ771801976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c90a4a7fdcd574a12516b78f526ffa0ac2f112cfa42d391e19245ca0c805fc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IDZ771801991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c75b45481aa83e06f09e1864320688d18a3be2973b6e744d85b69bff301639. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/IDZ771802005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02f7feb4c9496e6b618cf32b49f783af3efc05738a94c8c21aba10a749d8b15. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USA2P2442567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e36533800b837458fb9fcf53435ca3fa8cabeeded1a37665eddd4b4a695bc4. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USA2P2442571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45441efdd2e926caed5d4e35521f3c098122de488dc462fad2ba2ea556392d06. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/IDZ771802013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88359902160f4c00015e3350ada454bc2f99a555b5d8760805d35a97ca967cd8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USA2P2447650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477589685ae840518bedd684c21af5dbde1574d9f5eebe0ac7083e45cb32fd2a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2P2449205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c94b978f6b27dc030c1a988ee79260b0f43ee73f2748c6bf682520c619c743b. 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/USA2P2449347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffe3653a053f2bc6cae12ffbf89379c5e86cbd8d176ea3de5abd248e1da7944. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USA2P2449531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af4573175843994b1b033cfa375eb88a0e08f193594c6a9ce0ac2cc74c70107. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USA2P2450957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f9deb57709c36a02443679b11e9bfc3802b9ac410fca6d2968a2110379ccf7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USA2P2452881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55a706b953054ed90dd949fd72c4690a1453c16dc868d1af9f2bc11db8409d3. 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/USA2P2457108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a7eb411b5ec33f15d7d7fb0137a74f1b15c09c828e0c426993572cc22bcef3. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USA2P2457973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c430e199f9d93719cf5152a6e14a964d20d82634fe8d87e02caf220394a1c6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USA2P2457972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88a3241afe8b9149fcbc4e37e3530f0a60cc88cf695963884f86f460421939d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA2P2457975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf218503995233ca879e662368e5382582fcd3b24045aa8e846842374f032152b. 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/USA2P2457974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bcef0149904bd4981fb98e80acc917f1e63118c65f809fce8841e8265ea261. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/USA2P2459663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd430b07bab75d06cd666f763cbae7bea6034b5b27356a6466df833d814ae0634. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USA2P2459879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5d3cf115775b86091e94087a09165a95459f2af2a8085c09df9a2a7b7c4fe0. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/IDZ771802047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c2bc29e315c4b1818952fc0cb086939f892b6b0ecedec7156a45dfb20f1751. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/IDZ771801947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ff61704b4915a6506580e62ec63877cba298ecedf40ba533f7ad588363247c. 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/USA2P2503170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd934db560aef2b69fa77317c6623b50702bb94a0fc8963b1c50d7a8313bf1b23. 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/IDZ771802073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c6fc1c971310c4f180c33ae252a432cdb6f760af422d6cc8cc5734c1cc3553. 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/IDZ771802088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65397fa3ad0e7bf97813d73a853ea23f6f4535c068c53e9474251b0e19d41656. 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/IDZ771802125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd1555a1c456b321fd2fb09d136006e42f505fc58bba06f753c4c8dea7cd789. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IDZ771802128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc25fad571163124d8fba04615982bb8711aded9ebfc0a65bc147394fb3bedd. 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/IDZ771802138.