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 0x0950c959318887f8ab1c757c1ee988c9254f87094e7ade450d5beaefa57143e2. 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/8b9c36b8-d001-44ef-a32f-6907ef057d3e.json and https://artists.proofprofile.net/proofs/artist/8b9c36b8-d001-44ef-a32f-6907ef057d3e.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 0x85e3b90d6097a0a834deb5121a201e2b43330e7be29702ac0dc53fbff0d1a2a4. 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/CA5KR1908105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee0e88e07bee227b4955c5dd8a0628dfe5eb874b428751fb8dd305aa231b6fa. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/CA5KR1908107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac98c38d05dd0248f3660dda23b5e3bbae8799b36baa18b9fa22e69dc5f24547. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CA5KR1908108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93d3f6427be12bc9e7d9053e1fa60c19ce6ed9772fc4f1738073b7aaa5cde6e. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/CA5KR1908118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0617e59bc3809156e895f2cbf4b52c1c507b7cc5d0c79fd5e6793f060dd46d34. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CA5KR1916414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08485f440a44b08c3abf5f6f9abe49a4f6c2c0806ce31f14241b7e5366a1402. 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/CA5KR1927808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2257ada0efdce50ccef63fbf84058fc734c6be0c4e3d12315338b15522c1d0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CA5KR1972744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea3a8808f401e8cefcaa916e72c814776fa16cdbde949af0f6b1de6fd204c1b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/CA5KR2030037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03563be070288382b0c3da9095dc3ff380c7f74cfd9b6de13335bb348815253. 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/CA5KR2138605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0cc8e2baa4a0f35e7aac24dc7bff29096527aa0005ab26e877d0d56a3dcb08. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/CA5KR2138606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6d1dbc6883776b8c2f6431fb284efd3c5a376b8ee6795e732e8f12b8d43387. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/CA5KR2138608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccc3738ffba044cb999967b21dc36eb90277db1d5f21710dfef3ee683453cf5. 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/CA5KR2138611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a8c9ba0d35a339028d78949f9c728f13473a30d79c7cb790a6d33540e78f92. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CA5KR2171227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a2a1092693aa3a0790169162371d56c2e190b2020e32a10a026c1c8e92b149. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTGW2100487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a862c25b2bc9aa8bb2d15987e29897675db6cc237f97ce6874b17053fdea82. 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/CA5KR2201589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9def7ad0b32c8cc4207b0371fedcf568b51edf9d274c6a19e934a15165452625. 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/CA5KR2213357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1858bddc51c30cb398d2fdfcfe6387ccd3a610ce41e23dd782ee06d27798d67. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CA5KR2267519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6347d41488c19b5e4b52ea5747bc1982838a4f16ddab21b54a9cbbf2331c0b66. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CA5KR2321732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa6bc80e656322b4a0adf8f4b53c6b6f9e18c0084bc8d96700239cd01a07be1. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/CA5KR2343122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4be907509f64d1e3cbeb8baa42c30bc002a7bdef71e6d2d36c3398f86a20b0f. 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/CA5KR2360851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bb8df42ef4dbc4448932f7e4b17254d8200bbaa0e9a62c850263991f2b0e12. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CA5KR2371894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e206c03fa28d82885147dc78027b9c1c4909513a47c8f2f833dec9831036008. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CA5KR2380016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe724dfaab1145a894e26489c4359815d463a9cc97e8fb9b21a9cfad3484e7a. 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/CA5KR2442651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21faded24ee2e58a115ebb24eeb72d1321cf42f7d38cf45ad7a643cc1725669c. 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/CA5KR2442654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0aba78af51f8b799d86fc91a549b20d2789ad486adad1b71d70611faae10a2d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CA5KR2442655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bc766b4633710b70f3672986a009c38babd13ae3224dac272ef54f88fdca86. 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/CA5KR2442656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149160a3945c571eb8deaa328a88bc5ee6570325e34f62e315a4bbb1bc697dcd. 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/CA5KR2442659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1e8262a290d9c1cbd530f7205843ae0be17f75ce5953c9279248f8f2e3b472. 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/CA5KR2442660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd1afe6412369370f3f380433322f531399ae4493961074e47832181d3366d3. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZA742422806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5662cad4982d25c663c909744d080c88894ddc17debe1d308d70aa16e2cbe1c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/CA5KR2481238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0895a5d1b199257a494172500d887664d38de0d171685b0b311fcfad0bb52462. 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/QZA742423588.