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 0x1e0279ce65073910c7e60637123126b549ca32445482d06d56825cb9ca5cc380. 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/3921110d-253d-4f7b-b5ba-5916661db4a1.json and https://artists.proofprofile.net/proofs/artist/3921110d-253d-4f7b-b5ba-5916661db4a1.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 0x3770ab366f8a7dd125c2cc5ed0ed48d179dfd383771c03a1ab4e00cd236d01a3. 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/QZW9M2202902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfef6fadda0dfd1ea6722b8e55b89f007b2472e2c212dafd1629f2711bf9a21c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZW9N2222461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523e5f91d14f4d5eb792bd72056fe309dedf5f1853832f3ae4459be822e0456c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZW9M2202923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44713c701fddade4791722d12fc0c56d35b265be3993fe1bde1fe2879e0cf1ea. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92318950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674a4984934d6fd7d4fd5ea290f7b077fd8d5bff864189fdb24152d800a6c117. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJX2446602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9c77e0efcde581c2799bba8df6125177afc8fe85e09ed02053f8198913fbc6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJX2446603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf8d0617b6b0f1f67870138c554be1d27dff03b28f7c2ccc66d2569d3bba66c. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZNJX2446607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797836bd0ac41db5112836efacee6763620a21c271adce8b59370bd5aa1bf46f. 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/QZNJX2446610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bb5352a2aabff1c8d66e1e5de3ff6a17a1fcce7eb85aedf13f108593b3ad0d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNJX2446611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9731ddbc3bfd5fdd4b422a593875cbbd6d50c14173aecf3ff635511e7f8bb599. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZNJX2446613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f8b4ce05ebd552b4ecfb062d43cf8fd8afffe9beaae72edac6da03c5ecda4a. 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/QZTVM2456129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab41fd1143198c364144af5b1aab0fc5eeed7727d457b967f91b0d6a685d16a7. 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/QZTVM2456130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85eaf29c3a654df2cd94f3136cdabfabe12c6d01b2eaa3f41cfcf275f0ec6724. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTVM2456127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f8b4c7d28dd93a26628f26da1f4ec736e4ddf8a680465d808c665a8ddb0382. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTVM2456131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f3de2918159ba0a5d30c2896c51ba2199aef3d1904d29c6e3305e5d810262b. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZW9K2455323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8688d7d492d9c9b967b2cd76ead0e42dd35058fadf5b3d8bbc0a1c7e65b4a3fe. 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/QZTPX2568979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b5c08aa3c7bfa582cde7bcef5bc6d67b71bb065f493477605025f25d4d6220. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZTVM2541200.