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 0x7fcf18c4c745b40a089025405a48a3eba7eea3db206bb485deff09d8ecd1ee53. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/daa80162-8b44-496c-ba5c-4e1335e7605d.json and https://artists.proofprofile.net/proofs/artist/daa80162-8b44-496c-ba5c-4e1335e7605d.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 0xfd5e20d964e86f34e1c61ed6f2aba92cb16b53ed9b675fc0cc98c69ed10dcb01. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ARYEX2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8e859377f3b0b2faa885be81e9ac59feb7f69a0a5dec08aebe640759081599. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARYEX2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465a156dd842a191a4c0e3aac1321b14e79890c483a22fe9fa8d72bb7a154d21. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ARYEX2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb875b442b846022c255f9b02172061f42479aa9f19eb09b5da5652bf7c61edc0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ARYEX2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a9a491fe04cce67eaa8010845989bcff57b3082fd7454b97081cf1f126772a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ARYEX2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd158371299f3f78ce8152f82abee9da634046315cd84c85d27ca35c4e2e14a0b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARYEX2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd9b7371c076989f108e2f8228beba3cfdf441e34c07eb9b84376d0a243541. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ARYEX2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820e24e0e646d0a0edfb1d036fdca53fb372d1627f3eb9a9a262672cab253389. 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/ARYEX2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acb481aa769ed60bbdf74438a91259bff74543e7b7890528461c618c0fbed8e. 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/ARYEX2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd928da94cf2060bc4811331b59d066b04c4d8e74bb704025771465aa4b2e1b6. 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/ARYEX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5e20d964e86f34e1c61ed6f2aba92cb16b53ed9b675fc0cc98c69ed10dcb01. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ARYEX2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6310e14d1b30fe58806ab1b893a7a7bb6fd6b7a4d2ced168a45c560d8d8a2d55. 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/ARYEX2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361e2934ef26b4166919b59e42a0b1fb3fdd6d1fea187749761192a3f94da76b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ARYEX2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6abc91b6c2ee1bffa8ec42f3b6359de3491730362f7fcadc24e39d2089e12f. 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/ARYEX2400013.