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 0xde937acd01f2dab7cdc8d524beb6bb77c0d25c8c7d1a5e95678ae52d57a1811e. 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/81880c8c-90eb-47dd-853f-1ed39b28480f.json and https://artists.proofprofile.net/proofs/artist/81880c8c-90eb-47dd-853f-1ed39b28480f.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 0x70497e8f44e630de0f895061fb4c67a8d9008579697a47f1985a99d9dc6416bc. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DEZC62293969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31084fc739564926cdfb6d0b8bdd2e096c73fdcfa1d3f3be7281152689ae643e. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEZC62201400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7144891b04ea97dff01370d91eacc4804f61bc7427d09d0186a98ad6fa7ba7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/DEZC62201502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2633c7ef16af6ec2a05cfc03aca9c5d52d8cb82680aa3cf260c18834a9c578. 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/DEZC62215835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4ce8a9bad0b6d1883259a203622f01f2738bcf1a87c155be4a27d0cbbc15a5. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEZC62325321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9366891f00efe30bf86f3ff2e16f16430a498f4d6ebccaa2bd932c3092b24374. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEZC62346410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a20a3c5fb03e961e4202b8f7fa001dc6b860a18e8185ef15ddaf815364369a. 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/DEZC62346442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c52d7abcb13d124ce8eca03850bb29b7a5b10cef1c5c3dd1197f5bfa19cbf1. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEZC62357410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdd48fe99c3a733ab5697b2f01506ac28eb9cae990c03b0d729b5dd5f55d996. 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/DEZC62378732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3a85cc27785e8e4498d5f4e1a44e1dd08e71effb599344cc5f54c0e1065b8e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEZC62495465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855a6e5d443682ba8075c090d1d864b3c34b234f2d152ddf078f18728dc76329. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEZC62581957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855a6e5d443682ba8075c090d1d864b3c34b234f2d152ddf078f18728dc76329. 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/DEZC62581957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f64dbb942359252ee73538c20af2f414c038acb9cdad30687f131f98dbcd41. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZC62581958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3341d50f4cb14d15b599c65ce11ed4038958494f39cdf525a50a2f2ddcb5f62. 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/DEZC62509864.