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 0x68caa1a9b6e582534f5790b3f040e372869e4894d06e50c563bdb5bf5d7044a3. 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/bd4ad2db-7b9d-41e0-965c-aa5bac6710c3.json and https://artists.proofprofile.net/proofs/artist/bd4ad2db-7b9d-41e0-965c-aa5bac6710c3.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 0xc09babb6a3d61ad539e018bc54dee7e0963ed4dfe6d1650d8fc0a4a2c48d4ff5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHZ31962458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedaff55d8daeb98567e6348a05b24670cb6fd157ed51f0970b9f17ba81ce6b4. 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/QZHZ31962459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac831e11378b3dded24ca3f366ed05f6839b4ff0bc95bd04664d9fde12e7b35e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTVM2159969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae172ce152ca564968987ad252633ecb25a5c54fdd0b6064bf95a5858ba5ed14. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZNJY2443860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031dd473af80548c4eb38a09bc9e0aca8112f7431458bcf3fc1a3427f45afc62. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:55:59Z), 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/COAF42498789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d05b778845f1a053e43555bbdbc567fe5efc4d11d9f68b0c905ce882a54d8e. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:31Z), 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/COAF42401929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc577cbd74233bcca0d55ab25435a6a0857f9a4dc2241158a8a96ebd707e51447. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:15:37Z), 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/COAF42401006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae3d16b8dbb2069e6277e71810343762185d070970cf1087666c1ebd9e6fd02. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/COAF42401981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794cc9cf47fd55a454db8aab5cd67c59183e9b62abd1be5d6a04509281235e8a. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:46:42Z), 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/COAF42401903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6cae2295f49a1d578a96ee91e2b6e8e8b04064aa28de24120403eca015e68c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/COAF42401904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f14512bfc261798f5c31336cc1b0349f569c90f0d367949a866979538086973. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:00:02Z), 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/COAF42500525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd069e0d2739d486f79173c64de953eab22b5534da8d8c2aad3043e09468ed5. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/COAF42503868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd4bb04970e44192ea95b92c5883cab2096267a2063a5a56af0bb79bb158b1f. 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/BK4DA2514677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99661c6a1dec273cc2dfbbc52fc70021923cc423c31820ef5cf606b97623367. 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/BK4DA2309021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a071aefe399bd93b38299cd722a49c5d0550ab0a80019ac82b9da2125dbfa9. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZW9L2260362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1197a54e2b9a9f395a7640c4ea3513e3abda8d170f3e92a5059508b4af0409. 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/QZNJX2086716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111110d5642facf13e4a31397bff58a0be700cc37a11a11dd8bf414505ca2201. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLS2536637.