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 0xe77abe2958bce1f77fc5be2a70a5b1082d3103096bd98d1120381ee2cf6d11ae. 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/536e607e-3dd6-4ceb-8ebe-f25c70adde4e.json and https://artists.proofprofile.net/proofs/artist/536e607e-3dd6-4ceb-8ebe-f25c70adde4e.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 0x838cdb494a1f7651fdbdc6992b9d009075c65a38eab7eb24b161645a8bfcc2bd. 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/FI5CK1405936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572e42fede29df375a30f2de7ffaa23abec818815899abfea765e0412d92810b. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/FI5CK1405938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb6696c683ba687a4c5827fb77d2cc9b62851943d433f17907dd43398e2ec8c. 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/FI5CK1405935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e289ebb6ecd23219e32ddd5def636dec9bc569c97ff0eb09a5fc76b9392e6be. 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/FR96X1513938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a0449fdd8d09843e31db20c47eb0930fc8b5c716d00de8364bbf73954e94c5. 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/FR96X1513940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8cbe03ef680626a3186a0e19bbec49a4e5312792d6da1bf66c2ba663b08663. 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/FR96X1513942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383f8f2d20ee6f913fcbfeff368dd8ca914545b2405ff77624cd25019c13b47f. 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/FR96X1513943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7811955e04d634828086a209c3cdd76e78867c485c1362e41859675ed2aa648. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR96X1513947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437765aa0f6b2589f62cbcb2ec6a9875a741c47b7a237b42a680fbf63ee1dab0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR96X1513939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f188cb925c45a92c4bf9b01526215685b4963a67f55f0329f054bf43bc517c2. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QM4DW1702919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6221b97d5077a75d1bf75063591fc45164965ed9db5cdc93bb2ace431e4a737. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/UST8K1756948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f9d8a2210fabd57c58488ba9084d9a517a292858001216779d45508994aefe. 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/QZ9JZ1711746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb481001dc2f9156d8ed7c8e7c1af94506384f73506b9582a361b6ecfc7afb44. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZBRF1862195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1312389df5797ca75bcb1c693e85eb7cc8865a715040eecbce463e5959e7118. 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/QZES61977102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a49d5442dd93e5720aa896183f9f3f24998e62e67f4e1be78505bacbbb6a5ee. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZES81935507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90cc3506bb56a0a7e3ccbc7c573e4d70c6ecc4e2d3186e783b484eda659bdcd. 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/QZES81978951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb866c4724448f6aac5f2f0672b0918b579b90c22928af6e96464a9280efd076a. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZK6P2049805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1217d718057973590fccb0d60aaf1d0ac654ae10eb1c3d83953dabb78b8671. 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/QZNWR2017916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ee115ff65e18061c791256402dcfcc143fa73614413f3237cd9108c0ca04b8. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/QZDA82115121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dc2d3e3edb63af58a304d26028d734f8a673fe85ca9e5e7fe64178bcdeb27b. 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/FIBAR2200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a06600ea6dc03daaf6403f4b5ecc909ad76e115f29482e42b82f4049134fa6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FIBAR2200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a65a780ca44c6e68204b78ffd481bbe0a4aa724a4d7f8094a3eb0ad9fab9b9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FIBAR2200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3e1968ec685f3c35ef0c81b22793c87e51b68843eaceaf842e46ebb26e894f. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/FIBAR2200218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d48cfa107b5d18df45473904156c18752802ae641f32cfc0bec59ecbd3fc5c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/LTC841600007.