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 0xc19392e2df646da24bf979eeb4429ee9020287eb16dbcb0f8f3d1a62c374a0a1. 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/6b763549-a5db-44e7-97c0-ad63e9bab420.json and https://artists.proofprofile.net/proofs/artist/6b763549-a5db-44e7-97c0-ad63e9bab420.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 0x726ecc9681a04b9cc4e0404e2e9bb6d9ec7e098e79e9fc7e1cccb395f5cc272e. 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/GXBDT2475328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdd50876b15332b6634d9d263614f7ed85ec0c1d70816b0872b077896651ed5. 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/GXBDT2429802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c2f25390fb2679798f21f0e97836322153067efc405040a1e20183455b49e1. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GXBDT2467888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822d5e017ed4f0d140e1069aeb98a1ceac22547a8b44a93f77076dade07333c3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GXBDT2433343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb341e2b88a033a7f5b052039012a9e64d7be5c28ee159f9aa43123fe7ceeed. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/GXBDT2445875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feab14ad49cced8e29da2ab48cd01bb4db922b6a49f98333985339743aafd23. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/GXBDT2447192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f81fba31cf6ff29c3f338725f62085690fbd8b585c954f10ff8be474eb9c71. 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/GXBDT2442119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9b8897d66e565eb193aeacbe2ef7f534c2e0f7c670210b0b03b77f79eb302f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GXBDT2499936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fc986f1fa6cc8085ce3359ff34e8d7913e29b8e09db5318fd63376cc2fb323. 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/GXBDT2433588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf703c3a227aaca3153269d73551d978abf0e26f90b88b357e9a85d8ffdbd6e. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/GXBDT2452833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5b1faca8e8e0e929cfbdfe5b31a8d25eda611300f8c8e114b683a5e4818bb7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GXF972467643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a6baf70ff99e46ffe65cf83daa277d8da4ec8c5cdb44a04e0681a51e759655. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GXF972497466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854f000db0881e4b481caaa6e8ae9954720227b7938c5455b30684822e5a5f04. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GXF972464936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b85b44427a7d221efa84972cac64f2b2e0ceaed72c31dbdd9faab70f71a77a. 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/GXF972402979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb916d89ea08728041e2c561565e379e0cc6a0be376478d2c3ea4e48691ef00b. 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/GXF972422823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03119c4013aef7059cd4433dde0e6cc9c19c1ba16242349b008eccd2748311f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GXF972458577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e09836d7748aba43566010c03e616291efb8a0a7c81b5147546376a1f0d1895. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GXF972416065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc149d8d1c9616e1916651e305fc574805e7b91f78062896bcbba6a10ef06c38. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/GXF972404581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23928496a3045f240df973e9812d7cc3eee81699eb95efbbd9b8de267cac87ed. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GXF972454159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35773a261bcb35313a424d3b1df871d76c38583105d4f0cbcdbd7a504c046fff. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GXF972418433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b9841508a972404fb973ddf729d1ebd481acbe28c2eafb9d99ca684adbeb46. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GXF972480880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952c93e246920781c938b9b0be2097227130ad801936ac53c26c6e6f11491f96. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXF972412314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d26edcf987d1a21e597f296610ef78c9b9212d34fe2e69ccea87c14565d3b2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GXF972422459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b28ae4052555f18fb3d2385c595ea87188f5c227ba37ab8b2fdc72f125849c. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/GX89G2529382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca493133136c58a3f64467ef385532f7ee77675579fead3b1071eb30bea4571. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GX89G2579545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d442a616e1afc33c21b2b6cb2a007eadd18795c1fe6ed84bc2bacbf08ae23d. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/GX89G2540613.