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 0xcbd32b7b0231e3580dd6b5235531660487bacc44411fbc697f2fea85adb1f50d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c9d5829-0925-4d32-b3e6-cd25976905b2.json and https://artists.proofprofile.net/proofs/artist/9c9d5829-0925-4d32-b3e6-cd25976905b2.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 0x41a07324fab814527e76ebf7a98185cdae19c05731d07f165f65d1e1c3ae3411. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGX2301089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85542705e2f04ac12ad5a45ef1069bb54ba9fbea78a76abf44c95142acf6928b. 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/TCAGX2301094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e01db71092320df436214c7caa8feccb1599d41feab8e4b6a4ae4922413a6e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAGX2301115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0312fef8d5ac17030ff62611cfb8cd6574b2b28c1362fa8f38f849cf27255fb8. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAGX2301119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b231c4e957293861fc418797254749dd7e00d4adf90f694aa46fa98f27870b. 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/TCAHB2379292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f11c90b99d3e7b928b9cb6796966aa60f440e5d392ab1f1c4b8636e266332da. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/NL8RL2451624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fe9849a055981b9389a28c5d9a95a0245e3ece7aa573567896bc4f46c1f252. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/NL8RL2451625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1536c5c40a9b38b7ec48f71a787c5f4110107e6bf27df754f82be5cee1b961f4. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/NL8RL2451631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f1f3679fc44eb69c27631091df8b757f35fab357ed534d21d97049d189c187. 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/NL8RL2451641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0493d8c857e29b04d8885480972b3692c1e3bccb82812d57d584bcee141c98. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:37:35Z), 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/NL8RL2451643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3763ff98d00a540b02c47f6ddaa5b3c5f3609c46c1336786068791ed4117e4a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NL8RL2463594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a942e8bd64b5804dc574a916cdd2fc28365eb68f40fbdda356af230b71334ff. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NL8RL2427384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea89cff9265e4e1bdd453d19232dd2281de2da20d7d37d6d0342c78bc81a35a. 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/NL8RL2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc78b0a4d5f1b3ac9610dd5c7e9a70e0742ca223d0a558918fdd4b1aae94db1e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL8RL2551031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3810eb4d1686190496a6ab8cb41a923382092409da80f9ea0f4974b14240b3ab. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:47:56Z), 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/NL8RL2559254.