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 0xa1a6cb51bb9f8ac8fadabf823fc757ecee56c31fdc8712388697ffc1755c1386. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb06226a-1ea6-49db-b40e-a13ae4304879.json and https://artists.proofprofile.net/proofs/artist/eb06226a-1ea6-49db-b40e-a13ae4304879.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 0x6cdc7e3ed48f392fb607339138cb1c6bd4fbb35a44365eb464518854526931af. 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/CZAC22304101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5768a68d569b356db57c1c385ace257b98dbe7709136947feca03a54e7098e4. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/CZAC22304102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6141dc10e33395959b0ca7507867f1831229571fcab85d8ca2e53a5bbfb1291. 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/CZAC22304103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adb65d1f65d36bdccf48d2d520467fd13e5399fd8e1b5e494610c4927ef7049. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CZAC22304104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c575d981a1c1856a9595cd489276a4f6b46f3fb5f04f9fb0c129fe49738b53. 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/CZAC22304105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be6bb7e4039cb3a5ac00c8d864af431e0c0f93a00043f47fa6f63f828ce4290. 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/CZAC22304106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe03a3ad31ebfd2cce6086570b47f0d24caf57dc4234c169e27a672f5710c236. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:05:56Z), 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/CZAC22304107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b52573017865e83483a092a9892fd485c7a8b41089307af3fcb8f35a130238. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CZAC22304109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12379fe8a80073be9fd27542e9253fe5e1674b11904dab712e5ab8f369acf2c7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:00:37Z), 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/CZAC22304110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f191028ecee654918eed5f0f678915605c24e1f8750db29ce9e8d6c76d8d734. 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/CZAC22304111.