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 0x6629ca8229c24c23f89edf6020c1ec38f39fd5ce14d09eaad484196db4d35563. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b29dc55e-7074-4f77-a7f5-c0e5f628c64e.json and https://artists.proofprofile.net/proofs/artist/b29dc55e-7074-4f77-a7f5-c0e5f628c64e.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 0xe2ea6eadbfc3b661f408667a8b53ef6bad865bd0ccf04b08c50f528a794f5ea4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:43:18Z), 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/US92U0815002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b25f4ac284c802728d9a50d843033a2fd43474773c8a672339b2659c406a26. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US92U1309201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bf4d89cc88aa7a483181fb6e72336a34b47a80ef43e980e1f29fb3b106e0b6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US92U1309205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c629282cca16c941d96789335a5bc6d1605ea5aebc36c5d3bc48b8eccb8786. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US92U1309209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49294734a74d0eccd81aaf7c2c7a899a2332ddd7420c668d36598aea579ac213. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US92U1309213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4574a565a64763f6861dfc9b28d2db4db73dc4070ff23b4a45b0cd2be2358b7. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/US92U1309202.
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 0x443ea251198e525a962c84e591da69b6edaf64212868e097fd72a424090282eb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US92U1309203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8a50e45811bd4b596c51667c6d5f49fbcb0589f29a9acec23fe70a0a24eab3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US92U1309206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7532e53b33f178217902d3e1adc989be0c33024df5f19c8d247f60826eac97c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/US92U1309207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53224918688cfa0bec85d2be7483493a00a0d778e1975edc0cf59e8eb1689366. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US92U1309208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef5ebadfb4adc1e30940e2ea770c7cb99b3715f9b68587ac1bd24c1277f876f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US92U1309210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35020505a39665068e0ccaedf605e6b800267f2eadcbb222489c492bf9debeb1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US92U1309212.
Chemically Imbalanced: Revisited, Revised and Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16f3da898268853bed4687ace722f4ddfc57273991f0cf17b6350281dbbb952. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:02Z), 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/QZWFT2444355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833401eea2686f0e64515a38ce2aeb3c476772b4203fd2efdbb49f5563e620b9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA81892735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f773ff4ae4fc459c8e9b9c07ba7ebe2563aaf55034d50c76e959a1ea32f129. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN72030705.