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 0x241385cb97b359f7d81f265020a799b6c250bd411f377e6dd0ad33b964f8d26e. 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/52327311-4043-499f-bdf2-f85af6ad1719.json and https://artists.proofprofile.net/proofs/artist/52327311-4043-499f-bdf2-f85af6ad1719.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 0x2cd0f1f3ae495a2edd8ea86b7057c2a3593c690878566f00f3c6718a5056c998. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAHX2400192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd81d4ecd817d29dfcbe322759e1571fe1fbf5e0fec3bd6c89972a6ea98659a. 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/TCAHX2400195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92947f74f71183792d5dea099d08e19d5554ef8945c3eebc52c693105164c337. 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/TCAHX2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc090945c1d6559066ade14c362cb9e9dcce8bb46cdbac8d69617cd673d78e6c7. 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/TCAHX2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699d462010e170328bb1fdac17f1efc11243fbe52abc5e5139549b1553fce68b. 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/TCAHX2400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a8d770e9ececb695ca0f17ea6865779815d7f9f2ace917a6e3acb945257313. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCAHX2400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c02fff5257665dc847ff55ccd18ddde91050a4e73f60031217a6cf7bb405cd7. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCAHX2400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf997823a3953cc3b0cc4a59e28c778d206b9a93da47ef0571ba8fe4e090882. 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/TCAHX2400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4367865a3c39a2477fc1b4f335d029b5f97e6b10bdd0bdf9eeb7654d4a850ab. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCAHX2400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790e1e3b7439fd86208c8df2181901b3d37cf1f980ed820d2a0819cb35da31b7. 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/TCAHX2400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70abd9bd8b71bc8df7c38db4a756241d3e71105aab6cf44a0be1dd2b9a28710e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAHX2400257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bca5dd4f8e721f0165ab75ae83eaefe45480613aef11a8008de9eddb0ebada. 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/TCAHX2400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ebffc058a1d7abdf68c455144ed3a6069eebab1c959f790f78f1d75f4ba447. 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/TCAHX2400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43949b3862ef69f206e8aee451eedcf949765747b00e9973137c96948d915d08. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAHX2400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1b591b4041233d1284175c45b3c17d9bc4f453bc3d0fbe877903622e6abd2d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAHT2495975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1f461821cab09644715c7b93038a5140a5f875d9a908aeeeae99f3a4852993. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAHT2495980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3145ac2783121be2478f49758938da4f8831e08be1647e4b8295a48c5efbc60d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCAHT2495984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314c6fb7304c95834513b70e3c72803d8ef146ca2067a02d40d46cbe6e60f2ee. 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/TCAHT2495989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00440381faf45a28087a7ce327951d4a2bcbeb6d09e34110f7dbaa529db44a4f. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/TCAHT2495994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409beb4f755c90b285b935dfbedb57c8002a1064093227ce3fdb839d4f2e93fd. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/TCAHT2495996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1ef0e09e033773b2b045761a5fafe18b27b8d573f6a23e2b9f7b241deb83e5. 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/TCAHT2496002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473a3af07a25475dde25d5a50df34a87e580cadefc951478a7fe87718f2784f3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAHT2496006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa659eba7c9264e422f65f10347c425de322b3cc69fa348eee80f78c5f95de9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCAHT2496010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56968fdce3c52a5759612f7e8672e6a644c14ab90317405143111a07722489e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCAHT2496018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4208e7b23dde89049c3a3bb62780b88f13a3faf0468f5bd7f64e8a23644007e. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/TCAHT2496022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4097ef4251670660536fc559115b38b9b09569e0f259b54aec91471c465238ab. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCAHT2496023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1fa15b4b414a886793f77304fffcd043977b64bf7de211a32fba774dd2bbbb. 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/TCAHT2496032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e23eeccc05fe691913c5470ee05ac378ee1ae679e1c0ecb7ebb8282f9b67733. 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/TCAHT2496035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62089cda7ed39c0edf4b26bb8e76b1cc103f8ec85bbfde23089e60a80c0b0a2f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCAHT2496038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76db67478c56658e034b2a145e7560c3f95e8e30a612d1829d4519eab862b841. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TCAHS2346456.