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 0x7c3a9299c5b8162beccc07fca7a11b3c1a9cff90a4a1bde61b1340ff5f0b34fe. 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/de3dc6e9-ab2b-4491-89b2-de692adf2f54.json and https://artists.proofprofile.net/proofs/artist/de3dc6e9-ab2b-4491-89b2-de692adf2f54.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 0x19e54a360d485523332afca77e80a9b0489ddb688c84755fdb79bc7baef67dcd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM92180005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b32bc8a2ab6402ecb78342038114f62209b408e648a22b7a006b0b3d98964f2. 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/USHM92180006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986e3d5184b799e21760d15c59e0cb4d8ebcd7290d80823ed143a8ba0779da57. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USHM92180470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ea7efbf1df7ac4cdfbe8027265db8b42953c13fa78bc7d594a22e10c2694e0. 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/USHM92180475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4045a3bb22a861a56a40d28692d327656d739b59e4a6b5ed475aef1586562c9a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM92183476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1a71f3994afeef63fa2c0aa8992988a5ac2daa1df6e6c6f2f32d9ce012ee05. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USHM92183477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dd21db90d87d14269b2f38c483be3a360b9d901d6a7c873b6e334aabd62e8b. 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/USHM92183478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ccc6b4424054c794a13dc4b70e80b5277202897f14347983160865a5e1bb09. 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/USHM92183481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28dc82f53ab1e4b49ce1143268946e67acf3cadba4d5a82a2eb7fdd2c32235a. 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/USHM92183482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5eb6a972daa48cce5bd148a4f31261d89fb2be8fa7d56e4522cac25b4d362b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USHM92181006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe561d4720a4b92cbce1289962a0de2063c37bab3e8b9340f7a29a4509ddf3096. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USHM92181007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4fd2848a1149ba704c48f193f2bc5a6d92f6939b4526146ee6417e920f8166. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/USHM92181009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c71e2dd69847c2293471d8057ea10a7ae6bfcd73dcafdb5c516a1d99375506. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM92181010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a409b4408b08cc617c75f32bc061ebc3429037bba5d129713aa2faa0e17b0e1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM92181012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b755fb09711cb019829cc1db0d748d53e957581bb69cc8962b399b45382f54. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTVM2438514.