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 0xeafdd134b65dabe7be2e4fc0a7867e2a50551cd83db255b563f84d695f2b1a88. 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/297001bb-068f-450e-aa1d-c8f056a4b6eb.json and https://artists.proofprofile.net/proofs/artist/297001bb-068f-450e-aa1d-c8f056a4b6eb.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 0xf5ff6bd840317518a163f9c8d17fb760ba9d053fe3a76c8b029e567ef73f7169. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GX5MY2261024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778e1c883c174dfe04626c92c16c7eda776f4dbef04905a37d93f7175c03bfe6. 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/QMBZ92256628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b9950a1ae08624cd21c4010ffae1e74dc35b35c66456aa6677ce070a7b9f26. 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/USANG2273703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef441f095af8859f0ab2f2a47f6ec82980a0a59900fe8e0b4fd10adf2b09479. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM3DF2243514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012d60ab573065241b3266ec2fde7a26f4f8b5a7f3f21b8d2359fc0f44f8f8b5. 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/USANG2496866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619a0ebf5b43a814495808de1d50d254283026a3f9b723abcd9ded7f28ca5544. 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/US3DF2478367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf0804b69e019004e00a47cfdee8404dc0559f3a6784335904143f930082a42. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USANG2480003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddceb68963420020181322ee9b7d1eaa4fcfde82d9a922c2dff29025de1a89ea. 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/QMANG2409319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b261d245a91f53016243e0575c3a6f72e4891d0b6829a47c568997378655d7. 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/QZVEM2382107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5131470f62161620ede3f5d72812476c495624a96f44eb8b807d036b9b5c171. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/US3DF2486110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e861182bfd66d30dbdc095daaf6d9e3341d11c86e60cdd3d949e57444f00b21. 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/US3DF2486133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae4101a74b846e9ccc3d1b8d70070fcefa5ced17e08633cc33a8ce7c13a40c3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/US3DF2494218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725902fff1b334c43225e309c1f2bc16ed3739ced72ae643ea24dabb0750ad2c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3DF2486139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e731e884cbe33175250999594235175144de05a80b4be3be74c2cdc5ef658a7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3DF2486144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc89c57c5c859791710d825397fe06b3fdc1a1f5b1da84e743aabf3fcb51d4d. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/US3DF2486152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dc8dace9aa6d64c1ef5d356948f066fe6bf9c64ddd8e1baa47dca527b2e492. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF2486153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9a8ece051279503feac72bac984ec6b09a4a28f45e3648f80ec0aa54bacbab. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/US3DF2486154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b46e1e313f5d5f78efb243fa66ff7766e6d71578ce9fc3eb0250b444530c2cc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF2486155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd6d037cc9cc8072e0ab8cf3f00f8d07198614d91afb0763b88b7fe814a8f78. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZFYZ2509642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa3d8683a4c53421d8c4c48435cb6d03f5c8d35703f565a3d7882e8d7d0be15. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/US3DF2506701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0edf016118c4940695fc2ffd1abed0c39d3d7c9bfdac73697d93616b01f26c. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:34:54Z), 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/US3DF2506728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b99ef99c224079e805bf734ee327798d87ecd5405c13aacf1d005b2059ff91. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:03:21Z), 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/QZFYZ2511956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d660c06f0622afa6d9f1fc116edad843b62fd833af37dee43251adbc1c0c9a9. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZHN72553514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc542d0267c52e70bcc9e7cbdd74e8576f043f7cb736e7c727e661531b57f36c9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZK6N2597448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5d0eafae0ed0a6eb4149fa0cdfb43e59ad675d5fcd8f63b9fe6e1b0dede615. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:44:21Z), 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/QZPLS2545394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae4101a74b846e9ccc3d1b8d70070fcefa5ced17e08633cc33a8ce7c13a40c3. 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/US3DF2494218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedef3f4c8f45ad2a638c19e89f8684e88e11d337564b05fc0f89b4690e1d414. 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/US3DF2417660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf280ed41efa88f77c7333b7d8b7b00fb4e693e4293fae8002096c0bf450f911. 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/BCD4N2400158.