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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf37947fe7041df607a75c249c59272b5d54ebd6fabcd7a16ff2a05e9cfd6bb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/538a3c58-23b9-4f34-83e2-235e58a635c5.json and https://artists.proofprofile.net/proofs/artist/538a3c58-23b9-4f34-83e2-235e58a635c5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd07eb841dce7cd5bf568b99f2e2d3b46f4cf31c5bcfa165c4d81dc0012526e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6XX2246749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42d8faf552d320383f1bc02e29d7d243ab9cbbf3935897364e55d9f29634555. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IDA621600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4219c8b4f1af38ca18aacb0c5ac28151c45a7c491feaefc23b33a3095d7f10a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IDA621600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70fa71a462a62222f74a4f3a9845ea3ba928f8aa128478d980f1f41a78263a4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IDA621600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea39a91de0d1d8bb1aca16acac52ed901e22d1b55353bc156e7acfccbfbb7379. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IDA621600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308e949787bc957d09cd02a6dda9c9e9e27ff2025e00a5df312cef3ab0e7699f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IDA621600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8797ffa8dea511ddc6bc0a5e1102402342d12ea3a3164ec94ff57019c4fe0966. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IDA621600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fdf1987c0f5e7bc2c8dcb83921aca6c16e307b35e91e70064a86eb3e849b1a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IDA621600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf18bcc940f8e2f45356e03f89ba7f79144ba3e78d01fe8356b64177111e0f65. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IDA621600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1450edcf998a04afed4ed08a4f70f90eb919941a22021c18d25afb0ea61f7a2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IDA621600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe254d5ce9c0bbecdd39b13c5f75e772658535471bfd10c5e2156d1abbaf4d850. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IDA621600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cd5ac36478f096d9e77aefcc508a4a1838ac6b33498d841f572c20b26b3e8f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IDA621600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a0fd4094aa9fa8bf1c1c6eb1ba02ca7e58e97d13a739dcef6125226683ea3b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IDA621600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42d8faf552d320383f1bc02e29d7d243ab9cbbf3935897364e55d9f29634555. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IDA621600057.