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 0xe9099d3009b6f8522da491feccf90cb7ea0bd3dc3d05cd4750db4721853f51e8. 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/80ad20f6-9594-4f30-94ac-c3307f6a2770.json and https://artists.proofprofile.net/proofs/artist/80ad20f6-9594-4f30-94ac-c3307f6a2770.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 0x820ca387024c4c6a05e11d9ee7ec881edac13b0f7d5aa47c8e090152d95ad1a9. 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/SE4OU1900801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68725706479b00a526506963468cef50623f61b5a978f9d35f9a0e7a0d2c061. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/SE4OU1902301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e38eba541b646af8c21dad66945766b8bd9201a43fdf22df14d37cd39cedc8d. 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/SE4OU1902505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d5513efdec28b27a9cd2318ffaedfe50a2196083fdbd6f7392d4f92a5ed1f0. 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/FR59R2026485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fe2e68e3e2c5902b2861cb6061e572c7455cbd5d1eeeaa242653a7709e9497. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZNMV2191971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec975a20859d6ae4980620a2fcd92c3b79849abe1fd11d42914c37057ec312a9. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZJG52127902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888c2912488f46284dc86cfe802c1a44916277c2304cc185cef473be164bdc93. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/QZNMX2185067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0a02a4b792cc8c403898808fc8703db8598582181adca5ca75b469fcaadcac. 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/QZMEV2224118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bf0b32ed141a3d17fdfc6476555ef72d81aa3ee2627fb33ae6516f7269fe56. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZNMY2242979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0d4a843efd1e4dadac86432fe50cd56c0039c18005b4699d39b7f8f46e03aa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:46:36Z), 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/QZNMZ2235825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ab9048568d7d3cd56ff8cf94bc967af8eb76b7c81fb96998bfd51cf7ccd16a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:28:09Z), 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/QZVEM2312831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa675814d6ae2fa62755b2b0360f3c9fa56e1d00473e62d083735cf3598cd7f56. 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/QZVEM2312219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f91a10ecb2fdc5995f5174caac19a481b0e31a430f8b35a8dc94375aa9805b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZVEM2322206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5d198e38cf1a8b6d7b493ecbae95a1d043e445c695897e80165cd105163ad9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:54Z), 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/QZQAY2305721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0424f6547d8ce0443ed40314a985685c8f242a80a2e774b02602974081caa612. 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/QZQAY2343059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e22d723c3cf4ab7eb54c982fe68ef90e6c70496325ebf60c09c497b310b055b. 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/QZQAY2368969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5295c69ff2782eeae7734e0d51507881474e2c2f9720cff4e58b294f947a5fb5. 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/QZQAY2305572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85cfeaba9c9eb680c0e7f3be04825f5d85dbd5dfa2069f26884fc1861f2d172. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZQAY2371991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db0d4bb21ee6361b8b3aa35264c6249bb58321877e93130a5de42b393f16165. 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/QZQAY2389955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa775864a42a3a423dd946a872b7f7555939015db2a8f472f2e79c941bac13544. 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/QZNN32325136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1aa8bf49842aeb36457186371279d7ce19901f4e5d3e7b9365004edafe4c98. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZZ662412626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaec948a191e4fcd1f424770ddf2dce2e5f6e8bd3a13aaa0c760411e05183b88. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:30:14Z), 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/QZL382458957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6943ff0a9f95a1b438e4dc7b1f502686e6594905dbeb02b60bd9d0a5911d4fca. 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/QZNB82427987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e370ba5d384d56d77ab3692c519adb8bf0387f7359c9b6b24d02fd125121b3. 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/QZNB82453693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3278b3c144d71f7a2c4c03fd5e8cf4487b8fd67a08f417b2f6f164e93a0689. 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/QZNB82471261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4f50eb8f25f3e3e8f24e7c25e7387ca4c5273bbd8d4c81c52ab4299766cf8e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZNB82453692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e7dc9ca4a25554cffb4fd176f1651830240d5a1b5f35c3c02cb320459654db. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:21Z), 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/QZNMT2436208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84f27d27333d4aadc9e6c877caa3e9035977066a0ce9097fbe4ddabe395ca77. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNMT2477410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5f9f3a8f32f48dd5ae413e45073403eae9d231f15a03657f1ccb04f3c7d52c. 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/QZNMZ2473657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bf2e63e940d3f5bc8d46f88cd6f443e89faec3181e0e2b778c632664d81485. 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/QZJG52510829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dd9b1a8f88362562ea5e17038151fdbb1b3ee12b95dc18d9cf3040d0b39070. 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/CAUM82200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11fc6463302e183e76a4b05068429a683b7161b9a3d50ab4eee2aea8e439839. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CAUM82200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11fc6463302e183e76a4b05068429a683b7161b9a3d50ab4eee2aea8e439839. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/CAUM82200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124918fddc4b14f99d06d1bd05068f142765d11cc4558681396ddb59254261e6. 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/QZPEW2418336.