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 0x54475216d48b145842e4c8a4749288795fe80b4e379cf1471b0c4a6cd54d4aa2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6185b34-d6b9-49a2-8ed5-e8b75b2cf8da.json and https://artists.proofprofile.net/proofs/artist/d6185b34-d6b9-49a2-8ed5-e8b75b2cf8da.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 0x5a9fadfe701c5d906650ff7237d302ca41965a52a496e91898e2e4321654bd98. 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/QZTB52214215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a3cccb8b6afb40b70ae8b0828d59596d2843953394e5f0ee81adb35526785c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6G2316071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1e989015feaa90603b4319574ceea79936bb8376b547b81e4e9d445277dc37. 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/GB8KE2318332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ab162ef6f51b82063f4db15e9aa615471779622fb66640e63b45ab16a73fe7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBKQU2421661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873495c891da29915ae36577b7131a87d63784876e29eb6a9c0be38027f47114. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBKQU2421660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653eb572f788f0b1f3775059c4c9db5825aec1c24cf27862e10a584243730e01. 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/GBKQU2466215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5b072a78ce201b3848ebd138ce632980702f8dee07dfe4730da1ca6a540097. 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/GBKQU2471326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac082a6f35877c932eea8ca21421b46bd0f17a9bcf7664989e066bc0a32b697. 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/GB8KE2426132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a79a4e17e32302c9577215f07b63342f83fb05311c7218d254a2fd5bf876a6b. 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/GB8KE2426134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c42efcce5f78217d01ce4fbd3f3488492f44c4be455489fe421589afcc48e96. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GBLV62409391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54d464520aca4926bc8d8482292584bcf55497774e6a0a30f779326ed545436. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USANG2482417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5aae87d0d2045d6ba7fa8b65391b671dbe32f84900e99a0cb82554dbb39ac6d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GB8KE2427386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac88d1a0e9f61e72c56a14254409458711d579d86cb9b6fbaa01540dccb01a8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GB8KE2427387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca870a089c186a609cbe408498c76a15eed5da2014b026d9115075c5e153cbd. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBLV62414175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d49f3784219527eaadf7025e3acd06a1f8ceab08c71932d175a5b943cbe7ba. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLV62415967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68318d6c63b808643a641b3649d30a7bc2068975a4d75ba39f5641f43fc71c24. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GB8KE2502168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2297121fef0e3f3942746503be02fc60ee65c37864a02f22601a1ddfd42f20f. 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/GB8KE2503289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d8712215418bba456215ddbf12323474f50376e8bda54d70d43c9fa84d8814. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBKQU2505312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacd72fdd23d2c04daaacc2e199773ec69986f7624a640492f5a209260a9c869. 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/GBKQU2505313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946749861dc093262cc592a32bd7f0b9613406666a97b7e14670704e8192a7d3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBKQU2505314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b75bcccd76aceb0e6df9d66ef393d60ce2f997d4c101055fee71f2ad5011ec4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBKQU2508919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebc5ba44bdd98350dabd639f7ff737d9ebb63d74cfa0cd76bdac96476e0bb03. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/US3DF2525238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8076d878019540c31628ab676acd30bdc639a6da88ff3ac29fa846fb3e2f75. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US3DF2525239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7bd4a2dd4bf2e3e4a87cf31ff074f296bff0186151ffbb259d2a0d495a6811. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/US3DF2525240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71d65773ae3d697ae16a633a721ce12fa5938b494d5703985dc0803ea5cc6f7. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/GBKQU2516797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033c369812a40707d14995f07117d6f61551d433962d029c00829f675ca5956f. 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/GB8KE2506638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991f9417b2e697fc97f55654e670f5e1a5a483b682d1afc7382db284086716c5. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/GB8KE2506637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c7ad9767377a8819d9528f553f9a4b8a11ad5b5ac6b95171b8490e724d1dd5. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GBKQU2517443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb11f67f96cba868a86c4a8f46871b65559d53dfc8a85be05288572d2d5602c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBKQU2517445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f1a4c2db4e0deea446b805cccc34bca6a1614ebebb225488dda793239a7a18. 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/GBKQU2529392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc6d6b7730da548a1f60092a97320be78b28667ee895d2aed8622dfe6456689. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBKQU2532226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5927fe2e52803b430cc6c9fdba23d88f66d139982d8f33c0c36db8c530e6bddd. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GBKQU2532227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9954b73baa7b46f9f54257cc57cb5b89902e6b371673e73b841a73a29f5be411. 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/GBKQU2538288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fda5f964a61d456cdee34f3f42231dce3ba1b87fe333037f8dc89153d3751f1. 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/GBKQU2538289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b9b8ca1eefd6691f6a0085aabdad69fc5e3bd47a1a8dca790ddd03113ea806. 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/CA5KR2542113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb676cddd1064c0ad7b2748eeca9117e2176244b9698a7ff53d5bab0c20a66c45. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFL2523699.