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 0x80608e96a6e4fa60a2e6c30bdf144089b2e722b92500c0a77ece8a0710599583. 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/59e88146-173f-448a-af12-4a6d108354c6.json and https://artists.proofprofile.net/proofs/artist/59e88146-173f-448a-af12-4a6d108354c6.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 0x73f7feb09637ec0ed59b1a1da6478654f9310f7a7a6ae7dbc5b8e03be1074ee7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZDA61885194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcd5dbecb778104df49bf33c2ec1b9044ff6d475749cc56fea02590efd77681. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA61885198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d1f591656280e2b2ee5e165cb3746529bec8d7d17c775097f688e637d5c544. 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/QZK6Q1914327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e14db34c7216d61e56ffc288fc83c1b484c636d784caa61ae844c68994525d1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6Q1914328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf9615160f438461c88d3c884fc7d5e5ece09ff0cf54df15f56669c15b73122. 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/QZK6Q1914329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fadaa136f9dccfa7102f36fac1eebad106c27b4757a558c9f31f6c0275551e0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6Q1914330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d47a4d574ef58586aabaae59df11571bc67825ba5972e8f483fb83cb33c943. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6Q1914331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba106371e1e6299bee09f46379f49082092e6b80a412245a3dc169800778444. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZK6Q1914332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3ceaa358ffee5c2db49be4261551111b33bedbe6d6b7b47dff26a810b91e31. 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/QZK6Q1914334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c842fd30c65469b3592eccbddd1d52bc290c50e6eda72dd710dab598ca61dc. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:20:25Z), 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/QZK6Q1914336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3678b7c0c3abeff6eb487aa3cbaf118f9e36d50527638ab879356a7fb81d5cb7. 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/QZK6Q1914337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4a79d653b2d03889b0ba8418761902d3eb9aaa1650b86805807eaae122d73b. 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/QZK6Q1914338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0068df587e460d140b3a9a92df15b2d58441f9985aadb127c1d05e391f1a15f0. 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/QZGWX2040738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc91028f7c4d975bec55c9fe70d040c945a29bbfa43f3882b9b035ae113d79. 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/QZGWX2040735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fc71c49ddb9973d781e24b7db84ac8fd94d8e916b10a972afd482776d716b9. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZPJ32119332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7fa3dd0830c2feddb8278a8a39506261a459a50597b6046875b017a4ff7132. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPJ32119337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644b642fae606137641107e7e381879540c2c78762f8c85bad2aa2e2f28ece83. 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/QZPJ32119331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09f7971453f2b203f2cc3ee659381dae045980ffe839d9d1cfb72cae3f83ba5. 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/QZPJ32119339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b94a6a07fc71d9f1da824aa7aa9ad44f8d117e06e4dd0b9e756c6ac933a8d45. 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/QZPJ32119335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb014b2f69b136cf369a88d613d132694bed22a2e07679ccb43bef0893ab7280b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPJ32119336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57aea2ae80c2957c7cec70a08261f6786ef591eb31c44c89d1c7a415532af764. 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/QZPJ32119338.