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 0x83633c2664401f29b71e0c9f1bc684f8f0a4d32b79e7de64f8c6fd5200914240. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2eb0cb61-53e7-4f9e-9c9f-d3b0f6fc4dfc.json and https://artists.proofprofile.net/proofs/artist/2eb0cb61-53e7-4f9e-9c9f-d3b0f6fc4dfc.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 0x13dc56338a8bd1945f3a0b894b5fef9ebfa15bb36c586cb35b27d897e58a0142. 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/TCADX1819028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde64f292a42149012820eca7fba37f14af11ae95cc50a79c3b16c79accf4d180. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADX1819031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52909d6907b3bf5f9375cc37f467da0f46aaf2afbd834fe918fd48cfc3eee76a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:38Z), 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/TCADX1819035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb159bfcb47385d37cb1d0f17a957e03db75921004cbc5f2f17f4063018471a8e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCADX1819078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cf108768695412a93b88f15f535fabc35718099f2725bc8a9caf089ce184aa. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCADX1819090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba7e4f264088fd764f84b61f1c49ff9d35f140cafea35a181a25be1f9960229. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:13:01Z), 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/TCADX1819092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce09105ac7d60151cd815f9396b9f6dc82484c41419e606f7f7c03ba62a195e. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/CH6542173294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e4983314aa1e9b646838dbdc9c0ee5308091711b01e25c9043516980b038c9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CH6542278633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d41ba209cc7cf20f33b142e22f8b86b570aa291289dc6fdee6d7382c33c2349. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CH6542278638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd84e30c00a3de8cf154ece2e530edcfea3e57eceefb868bf6cefa4a645fab8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:55Z), 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/CH6542278639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411935847016d932b56a53a26b7280d0587cefcf18dff965790e5a6c44685715. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH6542278640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2798d5fb1792c87292c8d0cf4ee634ff3ac84cd13355fbf726ef0c20957544. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/CH6542278643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d0525a8b77ea57325879d0f824652ccf864b79cdafff81e5e095b3355a9b64. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:08:04Z), 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/CH6542278645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9130b6c986c5cb30300398c17d322cd3feda806f1aae1c3f2eac30a3b85de9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CH6542278647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c7eb6a323d757392a6153df0f5bf5d30fcd99519c50b00c266ce2ab65e853f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH6542278648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ba2b6ce6ad1918f0ce21414b1a882d2a118cc4c86fc8a232e9152158593006. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CH6542278649.