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 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 0xac6992b5a3a593a9756db8320fcef9ab59815efc3ba3f497050696cad3ce0c2d. 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/b2107450-135a-452c-8621-1cc1ec5139d7.json and https://artists.proofprofile.net/proofs/artist/b2107450-135a-452c-8621-1cc1ec5139d7.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 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 0x69ef16a95d71ca9ccc914ad7086f087da429dc83d17f4b45c4caed900c2a644f. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCACF1501273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27421e06e7ad257f727f4009a6888aea241db4d4f43cef5ec6d76c0b5957bc10. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCACF1501293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8094a735141690a8848ac9e3dfc5600ad8952777b993af126b17e16ef0ee29b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCACL1633657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15096e3c25055b5408741757f084c108974c3778d58fdcd84ca6c347054319d9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCACL1633701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9dcc36e01e469e5c4fbf365f29800e05ae7890d8b99a3560592e9e6cd1223e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCACL1633698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718c97c6c86d7bf0868924afb02ccadde49be4e9d559dfeb80f8d2ab0dcce1e8. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCACL1633638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee888965455311626274304d5a948173cef1e8c695ee80a822ed51b35f94b0e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCACL1633676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4582be4edc49f2ed254a0f23777228bfafbbeee7a7a5c89fb5b1892607664d6f. 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/QZAPG1715756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c466fafbf409ea6691366d01b43d32438fb2e2fb9b18c11210499b230f186ab. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCADL1836004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3802af182e087af9dcebc1844210354dd0144cd24c7ab0c6df822bacbae75dbe. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZDA51846124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c83f6bb6cce350f73b84da12050218fa6daa5a0f627431e40ca2f89dc19a1b. 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/QMPKX1810565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7762dd64a5953998dd3f2a7cac4b8303c8c47c8df3bfe959d3a98a3493d15b1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZES51869523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d78ea5219dea8b0e97888630b9c1500d90bfbd31a005a3f7acc96bb783abc4. 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/QZMEP2077892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde78f694600d3faccf9ba15b614a9e27a3a87302195ded2da411657c05ebee2. 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/QZNWQ2026117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340cc4bb3b290d9d36fb5be894b481827b34679e0b6bd1352b5064e6f7f1abb7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZFYY2254042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17aedcc4f9686e7b5439ae12812bed3ac676bf0c12a88169974baf4f0cf62e18. 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/QZFYY2254048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcd8a83259dd9d1119e9e0e235341c9b3bbe3ee63b1f1a2e64a987ce4167c15. 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/QZH5E2272836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89770ac7f292d5f4d6cada75e6b7eda50c9e924157f717f62914871dfbc4b6b. 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/QZK6P2196507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28724881b135b72f0cf8ee322f3c558cc9af57bbc5e8c51f5d7a367f072b33aa. 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/QM8DG2316145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335f0be336f17d119da75ce2564278740990307ebc319ff12de9d83738e30c94. 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/QZKDK2323682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8313613910bbbffdc26a38a0b3f89eb92efdbf7d9f8d34814c4b34b02a309eb5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZKDK2368687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d315d2d7272ed24c679379a2cf48a109c98f1e54f0bf999c7ab1b510f943d38. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZWFF2368515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97d08309ab4b41d883f033be9df3015b69ecb743a64d5d5efba37a4277bd1f9. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/QM8DG2383027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cabaf583178d56a3f83566f870764137a5c8ac734d68827c0808c9ca8b17ece. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QM8DG2371144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8585fe72a5d5a06b316500165e517204dbf9e9f3a250a4f03794a0e4c3165f5e. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZFP52349117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72484a9ed15d2652c31b2a3e47ac1cbb7eda82b12022a1a74ec040dcca118545. 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/QZFP52332889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf215de338a30a01ac642e60a52eb175ca521bf13ac2b760c27f73f56c73e5d7. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZWFF2368522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030ae56d7d55d71365efb2c218cbd9e0eb18b86fec6ce6222cfce71cd69be9c5. 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/TCAHW2446803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187f53cda52301b2f6281c2435e2030f3feae5bc3d572268ca27d33ab94ed1a4. 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/QZK6L2403751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b21a7ce6fbb4d6d509e722a49bb4a7f0378ff65ea85003536aa5d78f1a0f26. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QM8DG2454090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a936d1df201fc545a1df8601bf7dad56a0c3ef51b970e7e71e6f9310f1eb118. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZFP52446626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f54aec52396ca6c621441f722b65401901756a03fbb2227f73f88f9a81ac1a0. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZZ782495042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3445ff023b89421a022e7a35199cffe056a7511f1638bda7a9e549c6510052. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZZ782497719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb61cf8b987a2bf46384ed74f8075aa7acb8acfa2d97257499d3c564774d722f. 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/QZH5E2434149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1546965e3ea79a2e3aded37fc7d45056f97738ddb0f292a4033e6b6212e09b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6F2560758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b62ccd05703e931b85bc4ae04ad62c6292df589874dec1ee00b51e2afc998b6. 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/QZK6F2560760.