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 0x6dd26c88ed4732a64ea65f8674f6c03c368e62a7581d4d859fb8ff3b730582ea. 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/ee60ae2f-ff56-4fe5-9589-35ca386a8986.json and https://artists.proofprofile.net/proofs/artist/ee60ae2f-ff56-4fe5-9589-35ca386a8986.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 0xa608f166c01e5edb4d1a1172d67e7d166eecebb961c8666580edb45d74b293a5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWX2021847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa87ea458d0042537e5d27848564ec50c1b25f270895b8c94d1befd8e3c66cf3. 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/QZPLS2022235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963c66212c7964d9088d4f0928283bbe2f42cf2bec377c1de39c5118171522ba. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN72140550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea460912ceaa0115d8211e57517b5ec14762003fa8d233d8e2d0897b1a9ca13. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZK6G2180104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2de5dad72e7b3fd75cc3f458d07780d5e49af7bf4756da1067d65305cc358c. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZTAT2117662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5c58cbc8331aeb8a60749d57484b7d03b0226789764826dcf0d9f265f850d1. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:49:29Z), 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/QZFZ32288821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c68fb332d7d0d532c1f63201f508175c9485be04bdddc9479caa612567168a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHNA2212163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9560c3fa2736807a3e11dca19ef296f6929362268221d4475cfc6b6158459bc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6Q2254163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e9eb0a9cb168bbc843a88c96d217506850a3eb24279d79c3b88f814b0b15dd. 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/QZK6N2209709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe501ffe0052d2f97365f9816354972730f61a5046b3313e4ae1fe65b0d842bca. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZK6N2209710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6275aac6986e30ef7d430326d8ab7003ff90d74e981aafd161e309f4bd72e32. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6G2250088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada7a8b87dea6b2ffb7da8780a2c2109f306c6b6cd90d4ac26884f4ece24396b. 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/QZHN52342504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307e64eb572e679c961e67a13447cc3c935d54cb2c2282b90818411d93859256. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:31:45Z), 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/QZGLS2461167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4875ed369988693cdbad0eabc11c92d96d95e99e095a317be289a6ff0f10f9. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:24:37Z), 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/QZNJW2469627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c17ad4f4e41e8b0e2887b8192dd51544624108c26fd026cb706469dee63eaf. 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/QZTPX2479794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3843c81c74c00459a86ebc0f79594d2d8b94188e02345f3a1621e171e00e95. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:04:45Z), 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/QZW9L2491395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2780ec48fa1d1e6e8e4f995a472047bfc7541c7ea498380dbdbdaf9e4ccd1d01. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZW9L2491396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58b01ecd54c0c76098e1f7e1ae4f2107c81dadaa3aed8ea3af5bf35cabd0ba1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJX2581743.