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 0x8508741faf0d0fb041521b0be41f5647f7a3ff2c8003d55be865af2e8a1372cc. 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/ed3b9d70-c4aa-445a-9ddb-5f530c877d8b.json and https://artists.proofprofile.net/proofs/artist/ed3b9d70-c4aa-445a-9ddb-5f530c877d8b.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 0x005568d4554e2832c36406294d0ba5cfc83691b5721ea05e39d61ec13cdd4bae. 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/QZK6Q2325287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c835d8678ecc705c85035129aa96171bef1b86736ddd9ecbf2413e1535e579e. 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/QZK6Q2325291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d32658dbcf98af6e72fdb2294a615cef0028e06dc54fcf4d6e86cfb297a526. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZK6Q2325292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d32658dbcf98af6e72fdb2294a615cef0028e06dc54fcf4d6e86cfb297a526. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6Q2325292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5367ad2e5848f4e857c39fc2530aaba7b952abe7bae8ec0432d60aff17dd0c. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZK6L2318987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d27af9989360bdaf360e0b45acc4da83e77b8371eb213b6b43905fe09751bef. 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/QZFZ32498593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dee4006f45f0592c41376351f8ed5bcc921f5cbeef4f87e2e24b152b0f0e64a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWX2464274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e7b3a1615f2dcc839bb74415165ec6548c7369944977937c8f88b1970f07ed. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZFYY2596148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc7af90396b7b28c0c6ff02733706b8fd3be0ff63a3d5853b8b8a3e1504c379. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZFYY2596146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e361a7b38df5dee6bb00de291af1bf6da00a240e6529fa5527797251ad123a5. 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/QZHN62505958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595da5458afa12d2b35fba395dd0b00f22f4a16adfdb1a2528adf9bc6c087999. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6L2506522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595da5458afa12d2b35fba395dd0b00f22f4a16adfdb1a2528adf9bc6c087999. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZK6L2506522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480add80449fe7e4f8f7591488a416269addfc2821ce817726f75666e9506800. 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/QZK6G2525334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6a592ae21bea782dbe3a4132836cd4ee8075aae2e0b3769c0cb0245d2e6d0b. 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/QZK6G2525337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00cb1aab67b882150931b360fce59ccbb4d86ea0f21137a3a7b4c3eff893753. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6G2525338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a78ab279ba34f9d4a0d0f29c3d6eda30b3b03d5c257f4bcffc65230640610d2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZK6G2525339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fcbbd65fc327c07f2181c16f4b3633f76426c3f279c43e353bc8d20705b0cd. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZK6G2525335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bbd5e2defce36b7c1807bdab1f049ba3adc865c3ef73fee17e23967d518f7f. 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/QZK6G2525336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6a592ae21bea782dbe3a4132836cd4ee8075aae2e0b3769c0cb0245d2e6d0b. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QZK6G2525337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00cb1aab67b882150931b360fce59ccbb4d86ea0f21137a3a7b4c3eff893753. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZK6G2525338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250c42512526276bd8ffb9ffd356299a0ba790dae8e25d7c821f5995a45e8d32. 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/QZMEQ2555683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2806f1874b478f8e703518f6df6ae62896946e54e386f239b4333ead7db1257. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZTLA2575358.