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 0xa6da3e25aa1f625100414b26c0964d885a58a04b207788653ea12bdc2db943d3. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8face055-1235-4efc-871a-30d74ea4e3ef.json and https://artists.proofprofile.net/proofs/artist/8face055-1235-4efc-871a-30d74ea4e3ef.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 0x6531af98fab40503e48c9fbf2314eb09ccce4b1dacf1e183c3dd9a8273b028ab. 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/FR6V82369112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b06cb923862ef94a671a25e0cae6ea69326235180c41781b2a6a5bfdcf1c39. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR6V82369113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1c555282ddc95d1e4024a4b0ca83a1d40243ac3780c9ad27df18f2ff78d215. 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/FR6V82369114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57554fb21ec895f639a5fc7e38e880c814b2c117b53083270e408a3ae4f4b40. 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/FR6V82369115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ca5ca3f63e65c2f214a4f6c40db157d404fab63548f2e81004325cf670d102. 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/FR6V82369116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a38a97833a060a786fe01072f1c223504d0ed733bc5345e2d58149b555b01f. 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/FR6V82369117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe490328b39059eecb6abfd5a0c5ccce1e201128167c77a38cc452ab38ab5bf65. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR6V82369118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ff9a0ad4d91c8b5888afdcd417a5f46aa09bddc3821f108011e9951f7166fd. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FR6V82369119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70599536b57f153c322bc2f1b4bf546f241df3fdc43ef2d4b9181a16c3e958b7. 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/FR6V82369120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b9f45de89b6985d3a2fc23691484463e5fa2fcd46835caf1a640448a3aa9c2. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR6V82369121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4b152c0a7e76f10b470d404e60a5482b4111933750bb00c419b9e4a9208a8c. 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/FR6V82369122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b6437964724c901f1fc4438f5879e856b6a103ec7985b2ccb2a25013da195c. 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/FR6V82369123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec70dfa6b2a76d52f02bdedea53ad7484db64d6da4f9c5c638b2ed7561c26b6. 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/FR6V82369124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f179cba7f36a8011ff8fe166e61430918a6de28bda7c84830dd8bf5147ac20. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR6V82369125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4538ba82043f93c0756c8c0613afa548e75d648ac85ab4b4518e9bf4e583b8a3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR6V82369126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbc3c86b3b39c53a194fa3100661098946abd4972fe8f70a140696aeb21901b. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/TCAGN2207620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19aabe8a9447868bcdab2f73c64ce4068cf2f2e462a44f57c49ced712d8b63de. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCAGN2207623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37446497bc6e77deb4e22d7724d3516a4d05098fb8e547c6893233b1e3be4b98. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/TCAGN2207627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e634c11e1713972d2e300dfa4db8bc66fb827f240df241741d52926a9abbb3. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/TCAGN2207632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11afaf348863f30e7e1d667359f248712c7a53dce03c5431b1c15ae490878b9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAGN2207636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f873c499848c3a4776a8944721a726b0c70f6afd1877741b11463f4ae773e44. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCAGN2207637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b8b7a40d2d849bf24f3adb1c52e987ab595b9495041b686805e2fa9274ff31. 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/TCAGN2207640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58a8a5cb027975e0742f6b78cae33b5d660859d10eb416cba81cf4a081d6d89. 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/TCAJA2428316.