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 0x930cd5282805fcd3058abc2de410bd5087d0f3a8945a4cc4b454752abd0e5137. 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/2bb26c61-bae4-4a40-9ce6-206f078e75de.json and https://artists.proofprofile.net/proofs/artist/2bb26c61-bae4-4a40-9ce6-206f078e75de.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 0x37071043aa80defefe313b3a2bd7878ca179df2f2c196e4694d3cf136ea00832. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/DKD0J2200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed36fcd9cc927b52213b3a85ca4de9f478b2319466a5dfc954694bdfdf9f50e. 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/DKD0J2200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a1b68af3eb7cc2e5823fbffdc318491e8a0ed55199cad8e6f2af39d2f1aa82. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DKD0J2300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f8821abcbebe501ce004006f84965c566fc0730cd310564c061003e537f602. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/DKD0J2300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a1b68af3eb7cc2e5823fbffdc318491e8a0ed55199cad8e6f2af39d2f1aa82. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DKD0J2300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f8821abcbebe501ce004006f84965c566fc0730cd310564c061003e537f602. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/DKD0J2300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a1b68af3eb7cc2e5823fbffdc318491e8a0ed55199cad8e6f2af39d2f1aa82. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DKD0J2300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ad02a28e2d0f9486abda3cb34dcfdb9e3d7814a3cb61579430eb0e0f406828. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DKD0J2300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1124baad26f3259bf69ad103110a4579428d03f6010af862e932c3d0c86c4d4f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DKD0J2400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3769eb70443af3152fdd6f02d5384f30a9d416fc5b6668ecc3920a23fe32cf. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DKD0J2400314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73521deab20798c6e552bc63856af60b7aa34740de66fa490c20c1fe47544c8f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/DKD0J2400318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4acd11655a7afe405a2f522caa768302f8c1556397da930b4cfbeec83ac7f2. 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/DKD0J2400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1124baad26f3259bf69ad103110a4579428d03f6010af862e932c3d0c86c4d4f. 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/DKD0J2400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877c64563fa1a3ec3fc125e9ec1f7f508a75034b1848f6653a6b90fd1df70639. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72200408.