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 0xca0de38c782cfa357a55df2f07a738c196190a97b0831b567f445d655c42d60c. 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/5faf7fb4-e6a7-4a85-8a6f-3df4cd446998.json and https://artists.proofprofile.net/proofs/artist/5faf7fb4-e6a7-4a85-8a6f-3df4cd446998.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 0xeb8b75565783042e338ceea10275b625447b5532d2e3a0fe72c7ad7ca7f27c2f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:01:36Z), 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/QZTGW2400715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef6f6daa5972df299483cda35229b604e89eb8742f3ce07aafb32848b46b639. 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/QZTGW2403018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa111b4d2c0be1221853c67619844814d84cf53be90ce2c234734af7abec05a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTGW2403019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f4d99a72610b194accd4fcb9ad7fb14cb7c9a812810665c6585c34227c9825. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:57:00Z), 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/QZTGW2403021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65793eb2819c4d859a51913ff85f4d30fee315fff1c93e405692f66e5d3ec3c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTGW2403024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00ed719368d0371e86471d16410250b3535ac67ebae561c0642897faa492353. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTGW2403025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1ce967a8979e735753792a8716c6d556b466c99300ea23124f3648469bd36f. 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/QZTGW2403026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311b205c25d9c58237c588daf0cb6159c38e1e3d7706c326bf8f25f5d1bad784. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZTGW2403548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36efcc38de08f196f517a5b4a08f9d64ef459f219fbb05b2a601e6d65692d805. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:50Z), 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/QZTGW2403549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632b626afaf7e214c00ac9aa476dafb43a734672a964f7b13428add58dfca9b4. 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/QZTGW2403551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48517c2b59fc5da83b35dc2b4af41c3774c04633e5ec1d3d07256c1842ac6fbd. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:48Z), 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/QZTGW2403552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374add10e331a924594a05a37ee92aa8e70536da8f9d08b430ea57083726ba98. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:33:58Z), 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/QZTGW2403553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fd5595ff06753070dec8af29eb8c4b50417e0bf77076efc95e59236d023092. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:00:36Z), 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/QZTGW2403554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c6c09dfc1c0ed2bdf786dd6ab68bf187ece83bfdc8dfddb978c443a83ccd9f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTGW2403555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202c05fb6b2b5b872152d0b7a069a5c513452e5f9b9f4d9354c8e4c4e111569e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTGW2403556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48534a9860e77b360eb94c021e43c3b5acb0137b36533fc7169b6578509c4cd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTGW2403557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6669877af90b153ad08795d1d39f5fa71240e7cc02d6aab84ab684942b5ea6. 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/QZTGW2403558.