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 0x9cc07860231b2a13df6fcca07a9fcb40136ccc8f920e3a1e55d183757e790c7e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c7e0b2f-b445-4e4c-b92c-088ee0809d5b.json and https://artists.proofprofile.net/proofs/artist/2c7e0b2f-b445-4e4c-b92c-088ee0809d5b.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 0xc66794b982b60b6ea5a42a0af0fa04c7b3b0ecd31b612203c543b84e0b4567fa. 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/USCGJ1547919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10515915a783f589ae7462363f741f864c391a50e97f0abbef0285e3d405bcb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGJ1547921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912a42172808b7722dba1acb47c56376b6f1beda17ce8f5eb18d94113d4305fe. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:10:53Z), 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/USCGJ1547923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7e1fc6b9f358ef4ae67904efdfea0f33e11f504b527dbd9fda08f89ed2e98a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USCGJ1547926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea0edbf132791cb047e51f484b42e90f8e7801f0cd89d5e1cb445e18693c94c. 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/USCGJ1547927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5d34120a0640fd4389c6a1349409ec7bb09660193e19bb8c964373ea492014. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USCGJ1547930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39459a2b634c55f5614d6bcd65da3163865c8ad5da32cb07d95962f03ecad003. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGH1507949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05cc9468a760088a034e6369c8cebd27f3568cdbcc216899e0ef99febebd5ad. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:42:06Z), 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/USCGH1507950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c0ffc5a023b5ca7f4b665daebe8d08743cd39daf9129ae0017098b01f910e7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USCGH1507953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4c13f8acc4a5057f7b48c69758ef9854e4d43341abce63034ccac929f87c5f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:42:15Z), 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/USCGH1507955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f14a4389f1a486a6bc9f7e3b602a4bcd2e3f2ce3b63f4d75fad1c2559d3078. 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/USCGH1507956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b0c25680849327dcd2cc0d836ce9ea4034f0bb4ea0fcbfdb76c5980bce488b. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:37Z), 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/USCGH1507959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f41e8b358f65558f4ff4a37e8e25a0ad55985014bb5f3af5f95d3951e3e796c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USCGJ1864939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dbf29654e2cf9a14d8effbc91a38ef358327cf225d03cef5fef94409f65d1c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USCGJ1864940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1a452bdafd8d77c0f30f061af103fb8ca5a1fd5631c6d598ff5fead67b09a3. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USCGJ1864941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3672fc3d071936e6fdf5fbb145b2da03412ec844928f59d7bffbd9ca9beda3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGJ1864942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c247285667a49b99234f2221ed4e3473fc74709fbb9b12f20631773a0b4e3ab. 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/USCGJ1864943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d298f81d8f49c8fea1e45353d857c9ce10ca4ee6acb02d61edc0306d9f074b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGJ1864945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383015eb5aa5b79cdb8fa6c74bca7d86fd47a6d09f6e701e4ba87f78a027316e. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZES92324200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f93f734d4276c555c549d830feb39d73958d18596a97a0f69b014d4be845e7b. 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/QZWDE2435965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c67c3a815b4f5333b6426634669dba2bbab791d0e75c36ebba90047f8fa2a34. 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/QZHZ32252974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5b77ee684a61af25ce0acc9f8c5fbc2225ce641e301eabcdf6adabe9a83cc8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4R2357517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67547a82bcdc6eac0e31a2575561f62f69b18251aba539e95289415243967643. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4R2320517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ba5311964207b8cdbbfeb365a00e4ed78f1f58e5f25bf4e235055386770414. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/USLZJ2417614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103068eacfcb49647af3e37079c76bd0c754c6e638df2280543b3c6e0100a3da. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:14:54Z), 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/GBWUL2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63bda3a1f92a8b72519912d5ad3481599e2a8a1f9ebb7bb0c128477e241df0b. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/GBWUL2486483.