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 0x06e0d670b1b5dc49c4836107d6f373097278a184fc6fa5657382b1d4dbf1be39. 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/dff60926-b6bc-4203-9d6c-7916cafa3588.json and https://artists.proofprofile.net/proofs/artist/dff60926-b6bc-4203-9d6c-7916cafa3588.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 0x0295cada42875968bed29b8164e3fc8f09894f68c753461a8e5b88b855b27485. 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/QZHN82060235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9decd7a2396237e73cd25c46cc01c0ddfb40681a4e54013cb9fea28e400cee5. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN82082783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94b90b31268ae6037dc97422e0cb5c8010df73d449f86089ee1ce188034220a. 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/QZFYW2198425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6cddcbc42db963b84cd1a138b944c9ed412e59245f5fc1436d385e0ff4bca5. 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/FR10S2153383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5acb208a85503a9cdf7c720fc71f68ab584c5101ac574a3ecfec2cdd157cf2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHN42157844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf39154a481788aaeff9098eefde7284c7b508865947285d47f7f62d76f12a65. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZHN62139619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33695a5bec0a2d270684916e2fab4bb13bb3162025a8d7db326fb4c7e7582ff. 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/QZHN62139623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8be0780402bcbf8d56fb3e484baa72ebf1517bfe14b75a8f432091e954c00a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN62139628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a26f5414c2d6cd93420e29115b3a4bd15cbbe7325d7948923b2ede87ae77d9. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZK6J2171510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef98d6012171f5c042b9c20e134b2328452553202b7759478b60ab963345b470. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMER2191678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a29d43decd75c6453fa6c3a520c19dcb39dbc44b0ee0bf24647acd6d5e636c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZMER2191680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf530ac65ac9d94974596539328c25681f8df29af3214e0bbd149cccfc8aded5b. 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/QZMER2191683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494ffab8cd626f63746b1acffbd7bffe99ce7adb64531b565a75e34ea4f66907. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZNWU2153788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c26f080f8e1fe64b0fa91d4727147fda0399f4342fc6440c940819589e622f1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWU2153789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32351f16d5b077607f05ac698d8ecc6421886b8c283736e01d01f9ff07f1461. 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/QZDA62221442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d102d630ca00d0428abf342cf1e53f902d2e84fb2bac90bc085511c1672b166. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA62221443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f29cc55604c1d1a3478999fd920c083dd45b4df88c9f8c73e3e435401842f2b. 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/QZDA62221444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe8db286c14470483e55e8ea31e1e47ace427c5d9028a4df83e2337d68b8ab3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZDA62221445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9944c443ca1b4d4c5eddbf142961d5013e59aa3104b9fa10235b7ff1d31ee76. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZDA62221446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f8dede72d8220bcf50a7773315fbe67a6ba4615ce9fe35d9685c66563b1bd5. 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/QZDA62221449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0545e6b4f9c6d9cf32c347b770ee5fc7a8d4f1cb2a5b001a5cfb3a3af1fe23. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZNWQ2244263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c14cb4117950dca3a139e5bf0460940567f3c481aef50ec9c96003148b458b0. 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/QZNWQ2244266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb683b49a7e8c095bc6f1745b4fc60dab05ef3baf0dfc85cf0bd092d86874035. 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/QZNWQ2244270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ed44fb78e9a4f77b577d4e634848c38072673304e5558851d51b4ab3127a62. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZNWQ2244273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241e5aa6b4b7f37fe4ca5455f376a2e878dd52c6067d80a8ffd39e6c99da8590. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZTAS2278952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0f1ffe9ab34d1b0a0c83d21eefa35449319e6e5d047a39cc6ddb8100c7162e. 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/QZRP42363149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02088d35d22cbd2aa40c3ac43d6b444b743c4a0718b496470a6d59a4cfd3ab8a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZFZ42428541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd626451d05deda7e4c74a4e4d22a10a94e57381e1ea5c828c6367ccf2062cd3f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZES52467828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5837956e72d680726ba7bd1edd30b064df1e99ca0604205bcb9bd2622bd203d4. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZES52467829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e3250851ed7a879a40de89d1cb22173bafe4fb147417614bb7921968ad790d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZES52467830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63153190d8ff688aeadc38165755be7ffddfc763afc397599f29450c5f327018. 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/QZES52467831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b88bc9da9c822f84aa4bae94bb8f167fb74cb9810866d611a91781f67fd0d9d. 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/QZES52467832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc873a3411b56f62556e86125c81280d8a90a6c29014adc67250cf47a6ec86dcc. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHNB2465484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd51d3b73a4641ad20f3f400113d63d2c4b3d5169f156f9c432a39eed32fb7e9. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZZ7N2402887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b01d4747a12251ed0dded76fa098036b4652273b76a0ef2e2df4e9a301b2824. 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/QZHN72538540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571bf3685bfea30280b17046b7e5f31d5944695eebefcbe134b9e5f7dcb846a0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN72540542.