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 0x9b75eea089671235d119c04b782af11788b31e567e0b0f2c33305a47633d8039. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be4fa820-527c-47a4-8693-49d775dbb955.json and https://artists.proofprofile.net/proofs/artist/be4fa820-527c-47a4-8693-49d775dbb955.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 0xa64f5644f8b85e0806a37807da81d43c8a27302e28da818d10852c8dbd4e4cb2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:37Z), 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/USCGH1323480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5bda9a5df3cdf24c93646f4365a44550bca0746a86ce09b41e385e4bbcd8d0. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:06:56Z), 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/QZ8DB1700554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172e694bafc8d37e64dff7462f62d7f585ce0a9c90e069099a7ac9cd84cafc38. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZ8DB1700555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada9952d6af80d65e3b9b0aa3260cbc9e1b3153a41755c3776976890cfa455be. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZ8DB1700556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74575c31e61f6afee9f6ff33d446a109e421630d917584f515619b0811ae18de. 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/QZ8DB1700557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa743f4cd8be3539afe2169c7e3b6f11e3c15ef54cf49e270c7a4e19b17687456. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ8DB1700558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50aa63367ab356fec6ea500458b5ffd0b4a0b7ce3eee54b115dddc28f56fbda. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:38:50Z), 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/QZ8DB1700559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0836b2d786545d370c24a1d2fbad14038b0ba126164a22f669f165d19297e2. 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/QZ8DB1700560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1368c5af88f00ff075cf3538c4b6c851134888d0916beead50d0237b7efe7cb. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:03:05Z), 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/QZ8DB1700562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cddf9848fd2fb9da38782e9f7310d413eb054386c40a7fbe0db01cd18e0aaec. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ8DB1700563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b1c5fc4cd502f41a3ffd1b00c0a518b8dfb410e1583b289f776af029fd1ef2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:04:00Z), 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/QZ8DB1700564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c52b56ed9b03211979ae5a31a623c8c651ac6634fbf113c2a8b90f4fc37d3fb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZ8DB1700565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb017bbdb37f8d340e17564dc81644660679b86e8a691c043af4d8b9248600f57. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZ8DB1700566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87ea8e672d59bf5fa3f4e00017f1e1fef70a91bf562c2802fa9242fea36e029. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:05:23Z), 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/QZ8DB1700567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27b930b680cdf988f50fd4f91ef82ce7c93745be663fabea82337a209b7a1c5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ8DB1700568.