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 0xfaec6f89f642562989db66c746f45d7e769db7b1adae1c070d3c85ff24012ff8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d79b26bc-3b5e-4606-948e-567e7706f3e6.json and https://artists.proofprofile.net/proofs/artist/d79b26bc-3b5e-4606-948e-567e7706f3e6.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 0x7be5f14e1d74871a72f0deab86599feb41e37e71a581ce15250fcfb8d84ea4d4. 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/TCAEM1955538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26abe60705373de39489a1ac2ab6479edb7d793485112aaa96b3f769c954edf5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCAEM1955600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46cd7f79b7d4f4871f341cb37b084de8bb48ab7b02cfb4b9550e2e1626684a3. 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/USL4Q1986105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff9f7fc2f92037e64ac9c9f91d43b6eea4255dc67a9ace912d91c809265ac0f. 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/USL4Q1986108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3294d9fa80c472f2ad76a219da6eb52cb1e7471c7ac7b8f2abeb46268df77a0a. 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/USL4Q1986109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aa8d4aba3bbb90198a3ee7000a3a44c76b0d5d9419f186c9de5b5ec22f3689. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:43:21Z), 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/USL4Q1986110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ef1b26a7f45d4f049d429f7bb4c702e65421d94b9f67a6523df7a58220d5ab. 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/USL4Q1986112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d9975511eb6da5effa7a2f0aa3cdb41a41a72d3e0fad637a533e42846a1ed0. 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/USL4Q1986114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80042b880afc0ce7cf6f24c0a4979cba6ebe956181ff58c9c2524e339cd3ba61. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USL4Q1986117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e68e9c280e3a83a3435d718ddf7c3094d1d3ca69e53d423f645759d2b487d1. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/TCAEN1965420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d7efb7a9513a84b8ac27990b687b455fcfc86c8b7b1f63a09f6acce02fdfce. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:45Z), 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/TCAEQ2050909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ddcaeafa509310593cf1f430d75be59bdb2af94369cea5e25024f9b6881ec. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZ22B2071581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e677870427abc055713c1d517e0ab79b06521f229264d7e039d1ff26d9fb41. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:36:46Z), 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/QZN882153066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5b7019374fab1543ec66b2982db2148b934b9130a6adf7adb000f426b4ed89. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZN882241765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc350c3fe15aa2f97ee1eb3f15b445ac061f3d78f54f0a9f017352046103604. 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/QZN882260602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ba92978d5e129a9d759d7a4ccdb03518422dd378d1a63f57a249c12e26ba6f. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZZ662492208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e72338744b31dd43145d4bcbbeffbf0c47fc5f58d097ca7cf5ce3e357406f3. 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/QZWDW2420295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d44e9314898dc7338772fc58c48951c16f19175631f694b41db93690fb0fbb. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZWDW2462547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ece39a217c654036951a4142fd0bf9bab45a2a59ad4f570daacba0abd60ba0a. 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/QZN882515125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fac1ded435b4e3bfc1bb81c57699e34cfe9fb9487662c9f4b04b3fea833358. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:41:17Z), 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/QZWDW2507882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de573464b1539fa3d443d6f28018c1d4d7e2dd844805cb00040f8223e956c6. 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/QZWDW2534471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622a32e88ea564b61f416ade4ebeb3af3cc1e8a026493db435c644984d0ff9c8. 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/QZYFZ2522437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1314f4286ac5a7027205a1f2b3b13fbd7bcc82c2d02c286f9ae1b4969360f5. 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/TCADZ1841762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa7f428ec11820a5edc178c49662f693e8f471149be4b701f1297dbcf6a28ec. 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/QZZ662345258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1205294595ec411124dd0e744c6ff7a7a1921f8b1efe622829c58d731502f610. 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/SKG671400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb17fbbb7987802fc30b3da97885d9cfdaff08ebfeef51da7c83b720740ad33. 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/SKG671400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c3179cb12d04369ed300b924e25b078d2a38f4e818e885fce0bccfced378f3. 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/SKG671400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef95fee6f91bf8a17d3a822a330cb6b833a0fa93b531241b898d730c1ddbd72b. 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/QZN882126428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071fb55e9fa1bec83202229187fc734b856ac12f7cb50ca32657b8c60f3467cc. 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/QZHN72021829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab5cceb6d84ad121cd4b96680dcdfccf119bbe9183a7e976d501e09a9de95d9. 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/SKB331700213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7ce21a3099b27105f5a710c8d6c5bc52d19de8259aa90c477812509799bfaa. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/SKG151700409.
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