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 0xb4aaa2ed17b3524eb38766a2e5347c5a67a818c6201e8edfa98c7ac7be4c7cf2. 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/38a1d3e9-fc23-4cb0-b261-ac6289ef29ef.json and https://artists.proofprofile.net/proofs/artist/38a1d3e9-fc23-4cb0-b261-ac6289ef29ef.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 0xdbc5df1b6e8ccc67a8c59d1d71c82b9dde320098f0cefa33c4a3135242740342. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCZS22100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f5d082297fb13a56353268bd828f09710aba704365ffc17c02a7dcca2fc8a9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCZS22100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2449fd1a00e8dab112dd6734459889e8ecbe7b440cb8a8d0da8dcd515670e5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCZS22200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7422807005f62ec03f5cdd36c7651976e4342628746c8ce28f45a1ec186f777f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCZS22100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f56bc11a21a3278785bae7ac5534f4749de47c9ee921111cc45583e1872558. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCZS22100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf061a9164e620b6946b7b65866e7a0ea3e0c4c9d79338ffddec5c144a1966e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCZS22100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adb065beb2ee247d895dc0c0acba9f3b5a8d2840fe3d7628ba4430f97a1a685. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BCZS22300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f56bc11a21a3278785bae7ac5534f4749de47c9ee921111cc45583e1872558. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCZS22100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf061a9164e620b6946b7b65866e7a0ea3e0c4c9d79338ffddec5c144a1966e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCZS22100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2539857c8fd0bbd83da8c60c8286292e111ec9f8ae7c900e79fcb85323f475a5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCZS22100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9425f8388004a35b7e7213f1c0b1cf847bdd652773d1592c803bc11cb840216. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCZS22300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929b2f5eac9c3dd73c5b12dc012b95cc8f09652bae29918f8d863306a27f5a8a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCZS22300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24363a28b5a8836bae1feda996863fa295871d7828b38428da7558ca8a8ea802. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCZS22300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adb065beb2ee247d895dc0c0acba9f3b5a8d2840fe3d7628ba4430f97a1a685. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCZS22300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cfd66c4249d548ea4f7a27fab60758b04a662d63a7ac7bc3629ccb518e1a0e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCZS22100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa8419cb82ee037125e5c95721e9bfe5d61ec57541da9de51d7f8041ab4c76d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCZS22300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c89fcf0fc74f9a9c023c0a6352c759ed1c9d98c42860104f710c9117c367c47. 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/BCZS22400003.