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 0x91d5640ca498c2a14abc9c2956cbe935fd5087218c55dfaa9e6f3c809ddd4dce. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ecfecd3-379b-480e-93a0-f4b79647ff09.json and https://artists.proofprofile.net/proofs/artist/5ecfecd3-379b-480e-93a0-f4b79647ff09.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 0x727f042feea76fb99e1c46d2948ef0d63f6e864bda30d48e22ab3e881cafd0bb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDXS2200856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142178cd4b6622d702e7274b495f304c3b0d98582e03e51630a5a1b92a24fc0d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZDQH2370016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f8be52cc3ba4c1d6859661465e89471ba20fc33899ba6c6dd323b4047a143e. 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/QZHN92270886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171cac2955b096c12e0cced803f4338951dd749323c2912f11ddd81f8fb1ea60. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDQH1900338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992de24e738ba86ede36ed21681cec39cf241effe40ccb4ffc7bc44bcc2a0711. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:09:10Z), 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/QZDQH1900339.
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 0x38dabe07dbd22d7778a167c15ee705a4d5f03a005a8f9e4c53231965e2a6c666. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZDQH1900337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6230b4077c4d11b8e0f3445b914eba651256c28ed0148fbd40a77a9f1cd153dc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3DF2115000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9428acb34e9acf8e055ad988e300024b6e0013ef2b3581c58b7b459ecda7f86b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US3DF2115001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77da78eb3e96d354827dc2ec77daf0fdcf99955efc6ede0e8bf90c35fb545a3e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2115003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a16df62d4f4cb7db9211a426fbeecc1272bf7809779661440a0fd6df7b2e1a. 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/US3DF2115004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd289f914ac6e829828e0c165bb1f6bf67eb516fb4ccc4bf8475576276fb74827. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2115006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7dc88807169ba83f8d4adba4d35cb24e1cf305b7490442c073209066489aa3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2115011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ce91d89d9b97d0f2cf25a4db4d91f401ae747cb547c54d262b792e488350de. 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/US3DF2115012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7932ba61bf6966ee871c9000aef79f40721dab7e2bdadc5ecbd93cb9b2737780. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3DF2115013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623ac3a5ab65e7892f1e1f74fc972267f7c51b36286cc75c563b6ae74baf7e45. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2115021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240b91068eb2bd7540eab214367175947a06a6676722490be27f8d822d6269e6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:04:37Z), 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/US3DF2115015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ee67f89e976fe7395d2b7a52786963cae93daa098d5372c91a07b824665c2f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2053885.