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 0xacb0723c83a0fc4bfe7e9a42e6eb1b1deea6f447559ab376f2cc2cd2318c3fcd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e02351ac-3fa5-4c2d-b76a-379655b6c4ef.json and https://artists.proofprofile.net/proofs/artist/e02351ac-3fa5-4c2d-b76a-379655b6c4ef.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 0x44656e588fbddc6d20a9525cb84ba6523d4e217bb2e3e322b9abf7de1d56d939. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGH1684008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1b8c391576a23633611f527c62c6d4a3797553ccadec0b157b754b7e1b9e1a. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:37:47Z), 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/BXINV1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1759f8d960ec272119779fd767e2ab0c855c6da67c649f52744f2535ba04c671. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/BXG5O1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f75b0ef6bd907b401c48ed578742c5890d14f2b58a2b9aedce86b9f76ec3b6. 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/BXG5O1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407f1c0d0838487b70e2619d3c0eca611cd98900cb978b76ce4cf6f53601754a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BXG5O1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cf6233dcda3b20ad2ce6e0bf432d3eeb36cb7965cdb16f1792db59721fa321. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BXG5O1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1daebf078cde86cf6b1619d7dba7d9ab1369f4fea7102d2de6140a1c96e36ca. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BXG5O1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164ab75bcfbb758aba7d23d7a37073e244cb9554bd501375adfd791524e151d5. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/BXG5O1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9ff7c2662fa595e9362c65d71b44c0b68d2fd32199e321426fdfdb17208d55. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BXG5O2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2da93bde391ea65ac20f817a8dc998defc55326353199e1d6a9b7ee55b2717. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BKDMN2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3acc96137545fa631eb88c65fa8b3d1701127afe7b20ff2c1ff76f831e7b6e0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BKDMN2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874b839a463a5bfa9ab72aa868183cda2f495df1e0a1d93b6898ac5d70f146a6. 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/BKDMN2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6351229afa65b2ff7cbd301a80629f544a209b08b00a9c72a771ca147b96ef49. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTPX2521765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e3fd9c4f6946c268b831ffb3651a961b4599d8b9014d5abc291bb754a7d81e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC52Q2200067.