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 0xdc31d343ff1cb69cdabe3327696c45523cb6d4e84b2d5b3209b020b87838766e. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19bfa51c-bcf2-4c2f-9a5b-dc269f34aaa0.json and https://artists.proofprofile.net/proofs/artist/19bfa51c-bcf2-4c2f-9a5b-dc269f34aaa0.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 0xa86af13318fe976e27eb11c64dc95090a5fa161e97059b9b3e78d8c5da318733. 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/DEZN82532309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309261cac4ad6083640eee926c44e86ed8259cec06588ffbe10f2b2a248082d2. 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/DEZN82532311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9032a73ace2cb9f2cb26634f0a63c84c698a83ca6aa85966697eef3620b6101. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEZN82532302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360d2ae083331aaa27b648f715dce34e15e81f4dac0cb0e921592001e2666a9d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEZN82532308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851158e6562bb7b25c2c10d7700febd2f802b3e24e967545cba363c984655e58. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZN82532314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead94871cfa8b1836385231066e92305d18ec704cf9319e83bb2fec858cb89b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEZN82532323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bb025e0cec6a156953f5b7128caa4ea672ce76e054ed6b524e165354341366. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZN82532300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53448f63aa651e28a2bbf6bd6e4dad4644cf120d13d5cbf52037355c3477e6e7. 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/DEZN82532328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede9afd019615f04eabed35aad7196ae9b93321d92eb10b14cf33aee3fafe098. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEZN82532299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835a6df365c3c47ab3cdbcf590750053198dade74b54f31c0789b2f5f5c8a98e. 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/DEZN82532276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa911989f7d6f07e0eaeb692e616f28da3792322cb26aaee4e4464b73561cc895. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZN82532327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d9d1f91e4f18800f49ab7be47b325543a2916961127bd52d34b22006f75ce9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEZN82532324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e374372f5e1b23e37d1b85f3bb8d80d56d0e48b08eca2e04c3c7aa5662e0ab. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEZN82532277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee1e8cb44e8e3bc88d89f216a66b3ef8fef7bf219de47dafc262d4cde094b89. 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/DEZN82532320.