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 0xc1896c07eef7b9721e8a4b425d5db2c1cf19f375571d706380d20a98f9e68844. 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/9b405831-44d7-4d27-95f6-1fbabd2433db.json and https://artists.proofprofile.net/proofs/artist/9b405831-44d7-4d27-95f6-1fbabd2433db.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 0xad4b50c7221c611e6e1650424ea190cf2c97b8eb1ea8e032f777e0d63680a390. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZHN42021697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958cb489f3ed469c0bb5949392a33b676137c0788d77595917242af249a3fae6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZHN42021698.
Swimming In The Sky (Recalibration Machine Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3f5d07ddc5251ce24c17f32f673a84dca8adcb43123e1a2301f6ce6bdbd3b1. 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/QZK6L2077505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1fd8dc80b28669086d82b470e51a12a2ed6a12e2155d708e19e329d77fc551. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZK6L2077504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9d022238523d6acc0b92ca3935de118768beb1174504540f87987f85a01f17. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES62110318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607cd3cdd7b198f0dd3fdba77e5c5aeff19ffd0d013fa7f5799ee58947b56413. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBRKQ2131985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46215e8f37113dfc913f4be6c87e4244980fca92ec699adb181041a2b324be33. 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/GBRKQ2156878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5a9d4bb30370145bcb69eda878df4574c6d8903ff3279a86b9727472df0c9c. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/USLZJ2370597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729f0a2fc8dc60fb80feae6fed6877f755203f8e60740141ac774ea6baa46bbe. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBWUL2307711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b95cdbeed3d7ae1b9bdb9cfe4fd015f3fd685347fbd111130248cf039545a9f. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/QZTAY2368210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f21d8ff8090882b7d2749ea884e43c7a948eb09b3fcc49d8450a89d4b4fdc7. 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/QZHN52479975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3e58886d8a087406542171c595d83fd6a0229cda9fc6c8af534445c73d444a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6L2441197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce7c0b08375961011796cad11033033554fe05d796a1976979ae884b4aeb8b3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN72473191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ccca0baf0bf26d50bbc2cbc42bfa0c7c65e2698dd666607312445a28e58ce9. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZK6L2441198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52ec48d7bad715da45cf362dd783fdbcc4917d29764175d60ea9be8f8a377d7. 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/QZHN72469874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b956bf075e10fe0c394148bac44b93188d5eb29efc24f1f930408ce1b1599da. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN72469946.