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 0xc1a410c3129712becec80393b36656010feb0bc08dd537de985045f85b584bd3. 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/d05d23a8-c1d1-4dbe-8a2e-832abfcc56f5.json and https://artists.proofprofile.net/proofs/artist/d05d23a8-c1d1-4dbe-8a2e-832abfcc56f5.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 0xe88e15525441b91bdd48bec791c77e8dd0746b44805772d35b3fd37c9e20ed3b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNC2031565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcef3ac84d9e2a7e1e06c0d184c82fdb6049ccbed4a150db3ecb1aa8ae113336. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UYB282519873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9b91b56afd09fb04380160e117d4422e0bc07d91ab846e656e8fc402b8e85b. 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/UYB282507095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab9fee3cd3d87f4cc212310dd7e019e614b93040221ec53071fe94897cd5dce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UYB282568809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ac59765e8a5086aa8f3832c333d939838900b26112fd060e9e1c8f13c4fd96. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYB282520701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d5817516e1357047e3ed9e9f7fd635ab288f726a2410144ac19a7c8d88a279. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UYB282511169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00e76e71ad964131a56d95159580609d4435a76d50f7af6efb872ed6bcfda52. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UYB282590343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ff8ce4e798077ce75b0878cf005a06ba063fea0a2fd43f518860794ca33efd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYB282521014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06babac4d5bc3fcb03273f0f1b7bfb10cdc58d5fcaef71fb1ac60d7f15e854e. 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/UYB282518195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdceda611ec0c91b09270d2809b9befb712d1e1cbc9a5c32cd7d48bd624134d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UYB282581480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab66ae4d2b2639e78f169ad5c6c1357948cf9662972142abf09dae9161c56a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYB282537301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc459948b16732f614ece5a368882c9a4742179ed282da0419183c47f4c878226. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UYB282538180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef17109f76f4476c88090fc8eb86f9257807a448f4e90c49350f44a1cb31f466. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UYB282510682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838beaab713481a45f0ad66e38444f844d6c3201ad2f7195aa3f9533e11a1421. 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/UYB282577600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c431baa9953870d1bfdefc2a6ce1c1eb2fbdf4a5236e26d0f963946bc000994. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UYB282566542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0cfaeecb3d13ba419a85f6dc8f3fcef5df298c6ccf9761fd1dfe3df9a38317. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARIXB2501132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494c7636df1984bbf3839b6a716d86d7a0d62dd1e6a8f0e839c13e1cb88762f6. 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/ARIXB2500681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f22336d2c60fe203fedc17a173b5caf45c2329d0d4405cf0262d7277ff1109. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARIXB2401486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d02fdabaec36d80d8a57649205a141575c1e0d65fcf5745482f789c7c9e0791. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARQIW2209005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2f54ff74cf3e453dacaa70163e080a5e86386eec563093f033f243eef09e94. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN41926306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ce4e8d35e026a42720637010bfb9c1cccfe3223c1ee8e9a3dd850f221b9d78. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYB282211009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d7624c71e316b5dc75a9c3ffc926204aab4d807211c04011aaf127010ea305. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2147138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8527ee228fa406c8a47adbd2dbf30418ba49314a9f8070c2b8c0fedf1fb630. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR78A2300001.