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 0x2f647111ff6430cb13fbdab1d89c9a0e957dd37d2c6bd622341429df610ca710. 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/cd065c0c-4bd7-49ed-a702-df1b65ba9fc3.json and https://artists.proofprofile.net/proofs/artist/cd065c0c-4bd7-49ed-a702-df1b65ba9fc3.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 0x5c2e470880a0d5494fa84c92e64013e7e764c17da47c4c40c4f680ebd8de9ab8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SGB502503831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761fac9e925a4b011ffc012232f8bfb05c6fb34ba231bcf454cd1c559d8f8c0d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SGB502508562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766fe8b492e0d8d0ee89f5bbd53364dd8ee16e421ef4eb8ef8855a99e88297af. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/SGB502502892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9fb53daf3516a361db43a4983446d73f3c8557063f326b8cc0fbffa9e3d42e. 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/SGB502502915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d37f75cd0bf5cdd82d487fdb55ffe11f1435ffd6ad40b3282b7f9cc14dc0a3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SGB502500426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0344ada90c72c8569a08f525ab3a2b2a516b629c48fe962c6aaa471bc529b020. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SGB502509536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0199032a2801a39ff6f95e84a28c4671a6557171e1154600e0183e9997a980. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/SGB502502829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0512436dc06fded2f962dc126d78efd44ec28c0a509c9ff05ad39aac434bd9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SGB502503486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43da68f6ab22253c46ae70e3384fbf2d10479196af2105f6dbf0d0f2b75b977. 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/SGB502501135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7047a4609efef2feba3b3be786fe1d11a781351bffe7e75a29d2e7af45c458. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/SGB502506439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbfc6e6e6bf06326c5d3c885d9b4402313bb293bbab33c223fc3fd77fdf807e. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/SGB502506752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ba9713f8ec441f6b492a91628c07d676ebae8fa876d130a9733c9e22e301d5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SGB502507725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03bd7f9b03ebf48599b8078c63f001f4ddbb4d803cf32d9a137b04a49cb8c87. 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/SGB502506647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a48bf6d90e346e8b569ec4586874275495b19d43d9ea92a84c135bff34d7ac. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:50:30Z), 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/SGB502507347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b4a9e851ac7c511f37dd4887d0b8f34c3cd7dd41449782ea6487db42297ea5. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/SGB502500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f53f27fd94c8da92479d016e0a7addaaefa4052798bd71b47fae0f808996a82. 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/SGB502501749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2da06f70eb33451404e6c8f0024d4c4ac0587bef5f60b943ff88d6ef9ee4d3b. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/SGB502504694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d380ac69a648554c1f0f3ac53d92dc5afd4201828d7dd1164b416737fec3f4. 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/SGB502505693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5061ef7fcdabe5dbf7ce0d104a39c86872952462a74f3b5de0fd8b6bc14f2d35. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SGB502507131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a366f34e68cfd087e35ee82a741139d2b9e4e458cd7cfa42bbed43a2ef325a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SGW502505479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5618112aa0a78aad75ef2023d8cb7d46aeb4ca1e2923051d7f5bda83be82eb. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/SGW502503391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85786f862b0c70d07203ceabe5a404dc09f709cfe2b431be68b527343104b125. 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/SGW502501141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0307f4b25092065de55fee9cb7d89e5cf505b15fa8757751795440622a233bb1. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/SGW502508840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31aac266765eedc7f8a97c4ca66b9f8afb917d816b2d9aa99d4f5a1529004f8c. 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/SGW502501645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd71992f8e1a399b213649034b8fe326db6f8ed34330bc9b1b9e0c3c5d677d4. 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/SGW502504019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a91af9286eefa3a5209a5c7a548cc7852bc853e0d33eafe023cebd2e576283b. 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/SGW502505714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92caabd348458ff16ba51409086120bf0403ff9b3fe9d0f43d5841aa9dbc697d. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/SGW502506628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ed2e151f80b5651fab0f35f53299af09aa625270e59e6694744d06bd7f1e64. 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/SGW502506821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a4931333c39c189ece02646772aea04eeb1226bb19b7d745c40228acf311b4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SGW502506735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6a72d72612f21771d8c6b04285adb9093415eacaad6e8e81893a3f5863b803. 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/SGW502508783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f248633dccf0da5529714e469f4edb560daad3eaa033bbe5b3675e3250e60e. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/SGW502503342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146e67e4dd376338f83aabfaba91ae15d9add780db86971821381490e8dd28e8. 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/SGW502508434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e6561b100fbe35e0869fd4e05de66f005d32405ac4320afd127fbf4837a2f9. 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/SGW502504716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2780b8fb79295426ea01239d1c2ed73677be2e921df7cd913cf3c5855843ab0d. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/SGW502508055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f422885816c6c78c79857f83b7146ab21235f09522211218cf61cfd06842a7. 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/SGW502501370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ccf52028e27d92331863f7815ef57f0b4360b41b60274cc1aa3a385d4fc3ac. 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/SGW502501414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9bec06cd42d7f51966d988e1948695b6c1367d752a5fdd335493e9349623a0. 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/SGW502502691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe0568c9e647e748e96eb672b6ad1d7ae759055c34bb1b05dd68e56b82c3d07. 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/SGW502503258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f71c832b4bbc2155470c09dcd59d619520ae0d29fe63020e2085fb6decb60c. 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/SGW502500578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b247f27cbb36db87590680c07c1b0daed90e5a4ba267dd08c733e9de9a960a. 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/SGW502502609.