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 0x6b80d5b4318e3634dbab09e225404d9e0f7010e28b654354254e9e67817b3d56. 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/4d8b22a9-6d61-43c0-8485-b8939addbeae.json and https://artists.proofprofile.net/proofs/artist/4d8b22a9-6d61-43c0-8485-b8939addbeae.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 0xc4204818619ccbbd010cc4c65ff2353e0b1ef8d728d34124dc76028ff25c347c. 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/QZGLM2201613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0eeff32360bf3ec292ee54ba9fc61a7a08519d2eb6f050b8e41fea4c68c84e2. 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/QZW9K2257160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2363391be3bbc4c15de2e642f4a4044a492add70ff7da0d95b9ab3351fcbc00. 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/QZW9K2345194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219cc03ed9a72ae76fef19afb89e774bab0b4247ffe7e9aeedee41671e9510c6. 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/QZW9L2375047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bea493edc95a3de35213c9d2742363cf19b3f66d9b68044323e2c1212898314. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9L2375049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec9f1f3ef153dbdee0e9e072dce4ded65be7b5fa8e4f42edc756ab2f7c7e6b6. 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/QZW9L2375051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3bd90c2db365ab6a3e49735a9950da5e0abf5db1f1696d1237ba5951ad8bf8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZW9L2375048.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae94e77bb8c2823cbe784942a724f54f3015022e80e2f59150fdd203df3a44a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZW9L2375050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1ddc65ddb7ac925762bc47cb1b97affaaf214b450514605c1c276764cb0152. 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/BKIUG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516b86d1e26d7634de91fd83c8c9b6ef869ebf6432282babea76422de0dd59af. 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/BKIUG2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3113802c2946d96967b65daa25ca7d61c822cb757c10a0d8dff0043e113a376. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKIUG2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeb651294c32472e27ef09b532b6e9db6b14f984d89f551484fc46710e8e043. 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/BKIUG2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e52568b324a06b8dac9311a8126cc2f7b6fa330aaa90d9f0c321e2070c158a. 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/BKIGU2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728ed73723cc8ab88cf20fc76eb23517a9967bfd2bc8b2c8d83118edc444b41a. 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/BKIUG2500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f409cd4f6fa452e4410cf47f7216c4cb5f576da77e703312440fec258353ef. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:18:45Z), 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/BKIUG2500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8043bd370f22d23a49bbc9c87036172986052f24de7cd0570e37dfdb98d651a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BKIUG2400074.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd07824f24843ac425c4dc34b1108e97845186f7dcbff44994246c6b9b59adaf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BKIUG2500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc2cd5d8e8f88e8ecd192eff8490c4ee152f1ba1077ef29a15c1aa97f406c2e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/BKIUG2500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ede3482edd1908961fb8bfd03308b6ba738b6560f7bb6fe54fcac71c6be55e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/BKIUG2500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97e0b97a290eb2e1f5d642dfdec7c17b54158d7efeca28015255d2179924bb3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/BKZ242500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d26e8f713337af24a6a82c24e4d90389ef78b8ebb63981fc96720fcebe9cb43. 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/BKIUG2500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec005101319374db6b1a3046bc300ee1a301d9a82a353850217383d5223bc6fd. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:09:55Z), 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/BKIUG2500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c6f5bcfc0eb8a3c96e7e5916ab7119ed46f5c77605e513ed0b16e1ae104f24. 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/BKIUG2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76f90ee5cb9aedc06057fca3b9343ff512f0865e6925045696ac971040dd24f. 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/BKIUG2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d69fc747bb934ad645d2e6b411a7cd737af53a119f09a515ebe8999230ba9c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BKIUG2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b3dde69ace9a289643ac357dae19005d835b8654677c4805017ef9ed796f32. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BKIUG2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99170f65d9464f0ae318819b33c43d5d6139ad8b60d62866c7d4950a3937ca50. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BKIUG2400060.