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 0x0c86346fd52df46e64df771de99d55e4207e10373b220fb6ccab15e2fe43d4dc. 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/0716f50b-3f51-45c4-8b73-5d55d157d32a.json and https://artists.proofprofile.net/proofs/artist/0716f50b-3f51-45c4-8b73-5d55d157d32a.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 0x8066e6e3ac8dd9493222af3f3450a42344eaf4b94adea70cde5f7e2d2dc7279a. 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/GB6ZW1300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a938793baf5a0f4a501c2bbd0d0512ceada596c942a1434f63402a179dffa4. 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/GB6ZW1300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26831b7f97bb16471706d06f9657659e277bc150874fc5c980272eb6ae2a00d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:06:12Z), 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/GB6ZW1300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44bbf4df981b8ff3b37cf35ae09915b565254f1da2cbbf3230337c0925a59e2. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GB6ZW1300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7592989848f4f36cfc6d8b80ea65b23174fcf4d38de9f501f92cd1032ba56b1b. 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/GB6ZW1300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4ee7b1fbe766d51aa45c8af1dca60043494d0f47ccefba62bf8866473749d4. 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/GB6ZW1300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d0f7ab15ec26c15531cc27914a8d53d7cf4ced928a611a8f3fb3bb03c84439. 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/GB6ZW1300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d76b6535bc635b4daa34fa97df47efd559d9e1c6774c7463a297e60b69c5a39. 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/GB6ZW1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf58ff80ecfd40e0df706f20d01f9fa14d9879e0f5bc359062d108aebfaeba8c. 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/GB6ZW1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9d7d9d3f15d9175d812699560efd457ac8b7347d86c0eb8d9af1fc9db8ff5a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GB6ZW1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09997f10a003405b8c642cd4f797bcd0a4c3d65439221a17be8bcf68d741adfc. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GB6ZW1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3422aef1e444f45bdc95e2aa3b8c23ea42669da4722d7757e91cf15a435ef3de. 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/GB6ZW1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcd99d2a48196d9988b3626e7f136e25bec5017fbcd558f82ac17e4fb4184ff. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GB6ZW2000221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2682c6c4dbce21f93aa20130cb4fd007360f3a0d3cd831e6479c932001c3cd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:42Z), 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/QZNWY2479764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c80799e5422db24f60d2ba6518236e6d5623d133a5b75300d34437551905d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR4GL1097068.