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 0x4e7b501a8a8cba60110115b82aab92bc1df359a6147d3ac35b31252a1ef9973e. 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/f848516c-e35c-4ded-9ebb-3b921482bec9.json and https://artists.proofprofile.net/proofs/artist/f848516c-e35c-4ded-9ebb-3b921482bec9.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 0xf5dcfbf53fddb3dbea439f57e6523a3ba5c567171aea0d0253d07f912a11ec36. 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/GX3Q92208476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca8403ddf37a92c0ccdb44e45e7c34c94731afb528bc4fb61a04091ea84899f. 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/GX3Q92208473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fc93d2f9e2a3ee47625531eb15a4f69eace76d4b0113cc39a313b198d78f4d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/GX3Q92208474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e3470ca2dc902c58c7f166829d219c13592c654fbf4006f047b8c5ee646d21. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/GX3Q92208477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f6f160b0affdd94739896bebb996910b08315d9ed93f5be3fa6f5a6b684cb7. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GX3Q92208475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cf624fc30b25f74becc149fd083a7fa6bc57faa126ee05da69c9742a7d5ddc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GX3Q92208455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e35f6a2f3ae18eb4fe1d76a8d18a49691bac22ca880c6330b5bd1a5f06bf6ba. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GX3Q92208456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb64e7605753c2dd42083853a3341fc0bf3d8aab87f95914e9640b30ec9794b. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/GX3Q92208462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9141d9e1d89970e0f3ccf1256baf6bd12326f6513a7aee3c215ecd6b2649a0. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/GX3Q92323439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547d409ee2b726e5b261d0818a83be028a3cd66fd9451b8f67c0a2112ade145a. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GX3Q92323443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52ba453f4fd6100207ebb08b27e897d6caf8913eaee306dbd91cac2188b2b9e. 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/GX3Q92323445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dcfb3161913f5f6e67f44f5f3e7fa740a61e72e2c6dfe311307cd419219c59. 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/GX3Q92323446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35473ac67068fcd4448ab47239420b0556ded470b4908fe6e4a393d1f184b482. 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/GX3Q92323442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991e359ad11142a7353becfc2661beff8d1bb50555c8c630847db736321b542d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GX3Q92324925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76432470df9ffda93f7f1c808ff6fe0d7dc465a2168bcd4731dec6bec19b6a2a. 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/GX3Q92324927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4de21c8e50aa0f00bf10f20654017bbf94d424c26a3c8c6d9a1b740499657c. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/GX3Q92324930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55647f4e3bdb924c75158ef4c37480c0907f3c3f0477a3e536c9556492332a0f. 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/GX3Q92324933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bc941755a7835ef46e1eef546179a6207d205d19c169232ccfc3717f8af7ed. 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/GX3Q92324934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2a506bc22e4de9b6931c64ec013877224443c2a7148b451d9e86bb895a2860. 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/GX3Q92324937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e79911f75a6ffbfb320a4dad0e4cee332f81be34e9cc91c545137be8d1f9bf0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GX3Q92324938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29742dbd646cbb9b98efbab68693aced735ee6293c14bb42a89a2f32344640fa. 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/GX3Q92324940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac6ec608bb9188e32406538707fbda27d3c2546ddcbbc433a6b895ff653c8bf. 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/GX3Q92324942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8347a25bd0baff12ed747e9167371d15c7a789888a477d450172ac77074f4bad. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX3Q92324941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991ca2917c2bb58a3d89c8af9597cadae1c229129b365682717bed6b624851e1. 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/GX3Q92324949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7655fdbe456db53c99ae68be750ff6c4f340bbc5f6335475449e4091378850. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3Q92324950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e41c429c6894778cb167d3d91c8b4c02249323e996063af8f92679f8e6788ee. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX3Q92324953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ea56b692c0391a6bbbd322adbf98ea21cf1ffea6645656ac85676eb39aaf76. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GX3Q92324954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373e6a1b67afee8c5000f78a338d2ac7b6135af9a3f894c0d540b362dd3c343a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3Q92324956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c1f4e7250cd7024c005fde0aa3153c45d2ffccb645026ea2531e6aa482c650. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GX3Q92324959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34a13dd915c338b91c32610bb055eae1ce0ba1fdfb858ea08e12168287a7371. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GX3Q92324961.