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 0x34672b48e11f4485d1ef0668e6e01163dea26de301d133b3165fe92dc3e5f690. 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/697087ad-e752-4c17-a136-21827f915a34.json and https://artists.proofprofile.net/proofs/artist/697087ad-e752-4c17-a136-21827f915a34.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 0x525d63dc7bf8e3b6bf7e452886c8793bad564c39c09021ad0c2ef855cf1467f0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6N21570873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153d89c77d5e56abcd25a81f282235fdd7f5a376db419a35c1038bfa9d833d1f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6N21549736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981a0a16e50b8a7655152db6276aa311218fe8970f716c687827b5b649158032. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFME1527347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdb3b04b0f8ca2f03dd12a445fd87ea69e845f3d488d078ab9bb9a2aa665d9d. 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/QMFME1527348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c74830f644f9c511b9b4502707da89e994e76f8dd689fbade9666487b507bb2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME1527349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5873efd576e01bd5fdded1fac6247717794e6d8de359f79485b90c12fbf531e3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME1527351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff5afdda60acc79c103cf322a4d0ca67eb28362a612908dfabc84defcb2509b. 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/QMFME1527354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0f1644133e9a064b003d1ae6b4f8ff743a6d42f243071c1f463221e0a60405. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME1527357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf108726b436f0c158caf6fcefd107e316fcbaf1413190a50a785a31911b5f704. 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/QMFME1527358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f32ee1e8d4f40b86d80f72113b94faaf84868b683616678c63cb5b74ce2cdaf. 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/QMFME1527355.
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 0x78d15904288fd3f4ceed836dd50f132efee8b0ca0b1cae02a8767c9c70b2de31. 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/CA5KR2259727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0562a6b58aa1f54f864976b5de974894c01395b0cf112ac0c252158f42deaa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2259730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859a9e193069813367f81e4f529511327ea09496ca7123c60734d009c5703e57. 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/CA5KR2259732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b70ce9ba7c5fa1b3f3d6fa8e219d2a54fa9b9fc8806e5f9523c8dc939b34241. 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/CA5KR2259734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c85d1a8b36ec5065a195671aa9e7724edc871a1992bf215dcffdcac2b4015a9. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/CA5KR2259737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaab1eb5a477470b4ef3940e1c74238f54cab177e8a9c4385886ad9c523ccdf. 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/CA5KR2259739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0d4b40e15969d9d66ed292290b3a92ca89ff897bde85c593720576c964ca92. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2259740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f84a74ab34fcf4aacbf7d5708674337a1d4f8620dbe4c54386d278492ea481c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2259741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a149d675a63bfde29e5b75a917ace738dcd95dfcc37e1d1e32f86c9968e8c24. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T17:02:22Z), 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/CA5KR2259735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f878ea0b33999d28658d28469a9bb15864f09e9746cf6074fa12463e4782ce. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CA5KR2259728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd06491ebe8d5c8a8aae28bee8c2a7166bad69e8cd0e79d518b70b7bf9aefd9. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CA5KR2259729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929b977185167e0d4814af1d78d1eb76ae8a8a3d6e27dc087fb0ba3594c63091. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/CA5KR2259731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b15e2d3f0342aeba90d2ceacac4d97bb6d800ea1a60e417643b499cf8a6b43f. 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/CA5KR2259733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2816327c92042bbc59e0a6cde7b8033a6a0edbf6950c6323da057aec62b2f1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA5KR2259736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb3213ed98dbbbe77aeb205247f2b87cc5fe54798b352506d8e2391c284e047. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2258846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49e7527191b6269ae101d996637dd82f3295afb1ed37adb98bb11815b60f089. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2258849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc3ddb9fb0bcebc25730c518a5532926ae1aa4294227d61ce6ced08d1f6d421. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CA5KR2258850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24de3ec5e26b0d25fdaad2daa64d82121c5d475a08df5f12663ac2d14beb7b86. 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/CA5KR2258854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf72e1e411a512389a85c0a7bdbbf7b664d089c4e92ddfa70618596c17408d3b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CA5KR2258855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aaf49ba3ea09c8f22dfcaba262fe8554515a69ae1f06f543ba6112868a75b3. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/CA5KR2258856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41f5ac78ddbd05e9e715d7daae5ceba4e0ed52844e0a7543fc5a7d82a2d5675. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2258787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a1e8ce6a9d41ff64fb6ec618bf69ff7aadd3d2db5eef3dac4ccaf2751f06ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2258790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b77acd7522caf00f8910a4d273ee16e323699d7b2ea09887b959bcabf0a2f5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2258794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb24580e6755ac56d4ca8fc9615bd4d9c9147434eabbd185747b52050c675295. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CA5KR2258788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2c71bfcb64d15753655fdbe69e9f87c416cf924ece16fb54d788c0634d36ba. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/CA5KR2258791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6f8e769fcbfe347f460a09cf6a8fb5e6554012af18eb1933bbc9c94419c817. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CA5KR2258793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd970b1c93fbdaa43f55f1b30a42222eb873de9e98e1087f34134ab08f593df40. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CA5KR2258802.