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 0x182af997221c3da6fd86577573e0bb683df58924f1357f5a2cf9dcffd6a8ddc5. 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/751c6c91-2ec0-4f2a-bb84-1353257263fa.json and https://artists.proofprofile.net/proofs/artist/751c6c91-2ec0-4f2a-bb84-1353257263fa.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 0x24cb4101452e40b1d4198ea6835c4045625d93d5318f9d3652d5ed7738fa7964. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QMEU31500534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b50ca0d8c3bbe880a282781deddedaab1028636bb8f1a94c51cc1298062e797. 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/QMEU31500535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53390d1585c73ad6862e61e171b79a5b99dac2912b30baee8d1b565fc529304. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:07:43Z), 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/QMEU31500537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24f9bba56604d989021b0e0818bfb819ab393b31d40ad495fb45c08f7656218. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCADL1802378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9612456aacd7f3d4392485f5de10886f5c5fa47f0610dd74b9d44bb13cf631. 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/QZFDK1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5600b78500b226a8247864fb9ab4698cb995dd0de2b1507b1713a69d75f7aaa9. 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/QZFDK1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9612456aacd7f3d4392485f5de10886f5c5fa47f0610dd74b9d44bb13cf631. 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/QZFDK1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba73ffaabbdebf164857b9cd0d7478dd815114b6f41792120ff7c73c42f03417. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFDK1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb8d829cbd337e6e0460eeee1096933c9752de916c5d306bde0f806761c63c5. 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/QZFDK1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a509646cbbfea5c6f9cac43344af80646a1a9de2597c03a34b9444e665f7867. 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/QZFDK1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536977d6a075e228d68e69a27c52a519476311b6b87e098d92249b36a786f3a7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:44:37Z), 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/QZFDK1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115b105c02949cad89d0f6ca5b3f00765ad5e1063ffeaca392fca25a03d970d7. 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/QZFDK1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3d2813c7274419a17c2871ce33aed5810f8c85941bab100fe3692e88d1785d. 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/QZFDK1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d711a5c2f7ea7791d5abe7defacf19913e5f8a1b410496a1b81c6e8950349b1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:21:26Z), 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/QZFDK1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3896bc6b8ba4f13e1add721335fe8a0f29d5302db06846aec45121b1f01fa23e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZFDK1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60f96a3e62cd3e03b410c307451b24d452abfe6529c8961a0e062ed2160b6d3. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZFDK1800012.