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 0x0c420385f8657ba6f9f25b15cdf357c49263c4b294c8fc1d1f26210fba96e8c5. 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/4e7b4c8b-8383-4593-bdd7-d0ce2b18e6d0.json and https://artists.proofprofile.net/proofs/artist/4e7b4c8b-8383-4593-bdd7-d0ce2b18e6d0.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 0x763c8a9c1979ef9ff977e0a542fef0131a017f261dc39371dcc1b110d9a2be8a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZMZ92178572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5e0ce059fb1379066e130e4fdfd0384ba6b57c865afd99fdbbfe6a0b1af6b2. 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/BRKO12300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a62d506fe6158bddd13cae84e9b0136a5d55f2705e1c7eb1a07cc663009b6c. 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/BRKO12300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8896b0119a69ff4b3e06f3765d00e18ea8f835ea7e9682ceee6ab224febd8997. 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/BRKO12300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5963b637840d01e1d90440c48e943e7f695446e6850be200a679150886db0696. 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/BRKO12300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e7bd3a270fe91aa86e93c89b61dfbcd15d1a4911a46752d8a7f7b0fc963390. 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/BRKO12300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff6876ffb7f59d51e0b1b9ecb373dcb0c09f8d7deacc98ea131a1cb1326949e. 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/BXG6R2400621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1663e73d1d777be99d0bec72b1668905c268c24f2d419bbd0a9f9a55ad10208c. 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/BKLY42400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9730ecc4d08401b8c355909641c378b7faac75550579c7769d4bdc5caf5fc9. 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/BKXAT2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191a605897033052dcc37badab44671baa1524fcb1b3cbc5b8a0a3b70ec24dbc. 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/BRKO12300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c01737600742f5eb2f78cf6324b4b57639b61f9e1d1e6e1b6eaf6335defe99. 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/BRKO12300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34c118e41cc08bc7b165939eb06c746a74102ad404302606c50e5a308804702. 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/BXKWS2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29732a68b0c9e0e2ebcd08e6e9a09dbc496f915ea76a7ddd128f6143ce32b6f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCCNA2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b96317d2ccd2108da0c0489b79bcd380879627a02d59e59aa7a2fb45b542fa. 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/BC5FU2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410530b2d2421e26c6081c91f4010badac4f5e13451e43223a9e6c3736e20130. 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/BX9WL2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370707060d0f847200fd8030280ae8adb01636bedc52b20086aaca43df47b4a9. 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/BX9WL2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a62d506fe6158bddd13cae84e9b0136a5d55f2705e1c7eb1a07cc663009b6c. 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/BRKO12300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e7bd3a270fe91aa86e93c89b61dfbcd15d1a4911a46752d8a7f7b0fc963390. 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/BRKO12300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcf257ce602abfe13951293b0ea13a96c817349c30d6a7270e6902d19137a07. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCB6I2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcc6d3c45456c43cdec6b45a48e618c528167a1fe9f570157b294a57f64d269. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BC5FU2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2321c1ddf6fb6608123acd8732da55a955463fc2a9d7f69cd8014dff9ec77c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BC5FU2400005.