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 0x024bab4415dbe04f2f5543491a990eda0970ea6a24bdba7ff8ad5f014e002fcc. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef1ee2a7-3b63-4f47-b9e9-60f588fb7b61.json and https://artists.proofprofile.net/proofs/artist/ef1ee2a7-3b63-4f47-b9e9-60f588fb7b61.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 0x619e24852ae9a8a97de4438d0374393230210a03d62230eaef099c2623877dc2. 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/SE5BU2135221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e261b6bbef8a784da3fe90bae91a260034267162d044b2b64b0e9c08fffbd3. 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/SE5BU2102172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1b5736011c8689968f645378306e0c2da2a88f30e2f111d60171b5753d9d53. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6I32134311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b08865f3546e50a3ede38900d11b2739656f086ed7f5d73e0c7c49be6fdfd3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE6I32134312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638c5d76c486069b3dced62af8b8b196c57640b654c64a1883252ec945be52fb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:32:49Z), 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/SE6I32134313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc31e2671ec74ecccc37eec86e9c20d972ef66ea30208d370a80776257ae1255. 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/SE6I32134314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca4e580404be47095d82f2429f08a4a3d8419e7c1d799ba957d0c8b4db30685. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/SE5BU2115826.
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 0xb8a584788a0ec7ae9677e8e6280f6888802e8fdfc076a773ca93e6c1d1cce61d. 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/SE6SA2077126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb799897da401479dbfaac5e89f7f2865f74ab9e2a4d027f4d8cf67e2df70dcb. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/SE6I32134309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce7fc51875ea5f193e7d71e903970db93a119175a77625d50e98bcb6a3c2430. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/SE6I32134310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed565b21e79289b93ef1a23f0d4ef56f4b80e4190b5ad52fc0ca3e3022754e2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/SE5BU2450960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ff4155c7440d85cfd7caa3034d8d66f5022b49a5d5cea00d491c10a3275dba. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SE5BU2450961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d54469427ae69c2bb181ddeb890142668524ae389752bb9ed745a63a2de8ef5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SE5BU2450933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9712ce2df3e14d2d782aee08c2972008709ed4d328dc2b39ddc78b5a7c832f. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/SE5BU2450962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec76826d23f38b147ef28bdba18d9358b87ad1592d896f3c9a141e7391b0476e. 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/SE5BU2450963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2cd70e85d09c912c27b01894909ea67139774c1d1ea697ea7efca06a3ebdd. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/SE5BU2450964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dce8589f6030dfe9df5f8fac69fd37b37896e3e88468e997db3905816423d0. 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/SE6HN2332649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b5b26acfafc06b33178596c455ba850373b36000279a509cbd2ce72a6e50a9. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/SE5BU2450965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceca410009487f17866c4426849c1540bb8ccab894cdd71080e71d5f24677b83. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE5BU2450966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35c8eca065ea4a75209dbe8924883d4b68b5f2ae9712c17d4a1800142c9cd58. 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/SE6A92053090.