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 0xdcf1bb21eb3379d55c8b41410629e0012d6735e8d6a8b82bcec1b9da42dee85f. 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/4e96244c-349e-4f34-a0b7-1eb042961df4.json and https://artists.proofprofile.net/proofs/artist/4e96244c-349e-4f34-a0b7-1eb042961df4.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 0x7112ecdef6aaf633c8dd41cdae609bc3f2179dcec1e3921218ddf009a56db681. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ5FN2317539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2a379f8997b9ba0420d44de80384d181a14d1963ec7a22d59dd64f54162bdc. 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/QZWV32321055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2f82d152e9b2aa7d076e53763122fefea3eab00591ec356218b5885be66c56. 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/QZWDD2343865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc9fafd6995a1797be4c7982141d19bb0fcf00d4db33ca56bdb3effd82c4915. 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/NL5UG2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14a209416392b4b9dffd400fc62790fcb6ffad0e199fb9ab0ac17a99bb50599. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NL5UG2300033.
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 0xfdde5e5c14e451ef0dd03a0da682257d87dd3d3418c9c6602e6164325cdee2a5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLD682301780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8ff060e5bd44b9cdba46fafd818d3d1db86d37a297019558ec54c3ce54bac0. 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/QZ5FN2358890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cfd89be62b8e715bfa78779dcf3e1b531abed2533c0c7eba6aec4dff97048d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBRKQ2324009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacba97c02b6dd9ed1c6b34fe42d43d02299187516e6446023d2f630571e2052. 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/QZTRX2263527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c6461eaf66fda6958390129e9a4a8b86d6351634519eccd657f77e4b15590b. 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/USLZJ2231147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c6b7043168351e1691a87904e101c26a3adae7e5c8dc9c93544d2a0423d9b9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5FN2206325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb96d6d3cb86c37c156acaa7fbe8c4b66a7fdf7a0ba9d9cc932f07ff7a0e5636. 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/ATEK02177355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dd3fc58b68d338bfe1127d026176c88c6978332770b3102e220ec46ec11ab9. 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/QZMHL2034279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1de9e13d98d811bbcc5fb571c4f134eff91db25e97452f682e9df7b61bac925. 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/ATEK02177163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73950c4155c61ec26c96a47ed3ae4af1053b234eb113796d74de33fa8f8a4e9. 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/QZP7F2112670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f92f3f7950c3dd07531997bdb4d542bca88825479aaf13fa4209400c446afb. 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/QZ5FN2186690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a97a6dcd234a7a869cb06d1dc3c5306ce46a6a771c75552f2fc5ad30c9eb76. 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/USA2P2102536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21110d55be5753a88f7d7492002fe00890d0d5ab6907885253b8ea23c7ab51f2. 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/CAWHO2039823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264ade1f7e4386b6e0810844e80135d556535a7701fe4a579248ccc7dd272c07. 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/CAWHO2026698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251ce68aa6dbaa8300ec4fd677f4e379919ef384da424265754ae39ea537a3c2. 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/CAWHO2024186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cb813d8c0e7333821b7b15271a4e04078b23ad7d86c54048893f47e8b7cffa. 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/QZ5FN2012122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd110dc5140b6b16bb87f54b6df8eaacc3f05b062975c84b103c0acde57ea24c6. 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/GBWUL1923398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd35ca6d22fea5286f71cc8231aaddf4e27eaefb2be523360f1adc3e73e487fc. 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/USLZJ1926205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720e8a422541437ac5f41ecdd3b4903667efade11f680d8245667cd63a384971. 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/QZ5FN1994543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15087c0c8bdcfb21921a3824248c021a924c73aff8e33d6c82734e0269daa196. 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/NLQ8D1800244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56bdf1a3bf618701258a2fddcaea9094ab50e1d791ae1a7aef72a901b9e1851. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GBKQU1832729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb826cd75a8e26d7dab87355539c5aa689ffab00baa74b5b8ff77f6884cd0c71. 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/GBKQU1832730.