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 0x9836b081849635b01a9cf1e9a40bca96d267ebd36932163b29dfc2eab380302e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6440cfb7-3a62-4c80-8c4c-d943a835a031.json and https://artists.proofprofile.net/proofs/artist/6440cfb7-3a62-4c80-8c4c-d943a835a031.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 0xf759e6c3ebea94ef3c47b3c14d4f462383a8debae72f10ff8f33c333139c41cd. 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/QZZ8A2391548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ad76dacf0cba2814fd20f32406884c0ffbeeffd23488b2c46c2495b264013c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ8A2391554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa860a4d43da822f2e7bd33cfb7729c04011b7dd653c262c497f9188ca03c4c4c. 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/QZTV32416941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e601de1213150b100f0a0ef6f4fe025f091bae7f987aec961ac429cba7e3917. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTV32416943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e8e9c74fb322f414c199620037fe6e0825d8584628ff13b58a749e86df22b9. 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/QZTV32416954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18de6706b325a374c8c2d2a154fdf3aae9ed0ab2277427c50f276b2576ba76c. 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/QZTV32416961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990551c22cf2c0796f475c29582f0867b16e5a87ad730ebe669adc1108b39511. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:46:43Z), 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/QZTV32416962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98fcab5184c3b3b69f9d327775b87e6d5e01a969a725e7d9fdd4a070309139c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTV32416966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218e2c5802a76477d6ef806d8bd88cfd57f6dccdabe5052fa98b2302aac60719. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTV32416968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f366129dd62b7848d66421d2af3b4332c51ff3ffd1eea4ac9abddb4d527cf8. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZWFX2514804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd34f2298600f3f778ebf046feba739449f69157baf570eca6cc75d80f3abb7. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFX2514805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9a683acad4321d5de08a414775ee33900b87cbcf8a04ea371c2fca715ca593. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFX2514807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1552204a773dd908d410f8809facf37e2206f71d0b94192846a221c60a0ca0f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFX2514808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116ee3c08200de5df5fc6bde58a519b1faa9fb004d059d124935d4e59a19a5cc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFX2514809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a66101f11caffcb62bc168f0923e3d7830b349c7ea29296433ea35a5e026e1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFX2514810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6d5dbbc88e94fe680e910ae37a188d7627aec10e260b3a0dc015a2f7a4b77d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFX2514811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b10bc3a1c70f35e9f24230c9d84cb5aa8d30c16d9601818dacd87f6423e386. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFX2514812.