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 0xeb2a86c816f0d3db53b8702ab300fafb548d7a47e06ae2ec94027c7c670a7777. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb732876-8dfe-4fc3-a2ac-b1d6ebbd41b5.json and https://artists.proofprofile.net/proofs/artist/cb732876-8dfe-4fc3-a2ac-b1d6ebbd41b5.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 0x2111ed4ee5a847febcbc161e35157f069ba0fd6a03cb973752f99664cfd9954c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GX89G2487218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89a9c0590d67fcad08933d31c2e7d4478dbf811fb7eb9aede0f748c29aaa227. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GX89G2460078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c15f5aa25eced1e7cbbf69dbff67f583d2d84fcf1308d0bc0537ff470a80034. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GX89G2492093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb93dd8be6cde0223a0ef910e26bd9d0b5e8e21e74a2c0be5c2b0eb624e0548b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX89G2412522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc121acf671ed0a25585ff853629667608cee79fb370c64e644401ff7b3f3d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX89G2468253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6a0b36aea9cc2355caf29fe56044ce9afa2b0eb82ea182a94f3098bde6abc0. 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/GX89G2440015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc114533fde7b151978f2112c32ce880ff1892e5d7dd8d1f0cb02f80ff47330. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GX89G2401601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7586228a1f4cb6fcb55ebe4ecbf4226cac9e33134d88674ee78469a62551757f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GX89G2432341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fac030f8fe400341783b03a951f103ad9d530c593d44ad33ccef1ebff3fcafe. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GX89G2499236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08f928f67c1dbd0722ac884737f19ee81f6ec78b8a59d38157cab763829875a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/GX89G2405234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc88f0db0b32a4ac7cf9dea431b162e527b0ead24ef53b97c40dbf9752653c1. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/GX89G2472708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c048fcbf06035daa0c233c27be268b886a060bab2d54634c5a3d9015cc2ead. 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/GX89G2429219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941e0ce0b3bee842f4707e219c4d7f181c020a228c5813c02d82f68c69d17310. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GX89G2435974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cdfbb96c30c2e77cd153476809e705c05d25406ae48a3e4c86af5532190154. 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/GX89G2448575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f5f42262ead0a67c5a3c1a13fb6c06633d166c987a6bd41f9ca59b119dba89. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GX89G2487715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5ac1ea5e24bc58d199ab5c10a944786898cfeb3707b7fe7cdc03ffa67cbd86. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX89G2437521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dde723f66d1930b22358c86f08bcf93e5dd64e1c93b8f0e8b3f79e8767b5969. 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/GX89G2490625.