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 0xa42855fb118318104cd56275ecc6f854ca53c3fdccc541e2cba72bd555626def. 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/08ec89a1-1512-4fb2-a016-834065e208df.json and https://artists.proofprofile.net/proofs/artist/08ec89a1-1512-4fb2-a016-834065e208df.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 0x0f150d37889d6817095380b30889411b9e169003463354d2851b9e323d7c2dbd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9NG2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d2f30ff84416c0aa5113ffd525eb081d7784e28b8b134f12957797200f3246. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRR642101492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4bd1f23dca58a9ddd36d1d7bd40a8f865e3f4054323212ffdca067e1b20ffc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRR642101329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe67ab1ed67a74feed708e383245f78d14d30cc7ab63db6e354c95f70989f0d. 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/GBKQU1943191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed38fc2c2e6f83a74bb6843548868c3290e7a045a0c5ef66d106c8a6cb0684b6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU1943195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89eb911e698e2f91b1c3a2f459e722e01d59e8b0bf02c4f37dbabc598b143b44. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62322147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe998d2107001b7d1aa4b4996c9664d9f9588183f9ad4576b4a2c58ab5812c5d7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV62322151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882719ebfadbeb295eb93d76756e76fab81b39f33dd10d1bb44fb2bf3b053c7c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN82435996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76dcd307b91ff819a2731c3c8edfae2fb214929fd65584feaba3b2c90f87648. 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/QZHN82435999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891007ea09ea82a3b850163b743b3b478bc89e61cfd27b4909fce484d623f2d0. 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/QZHN82436001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6480597d780034f074c669f1465d0e057189bd954ad50d838f08fa00ff9bf716. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWV2285530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa07ae9eace67a3caeb7e7bd5507ba8001945086897821db47c6146acafea193. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU1956043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae5560df67619c55b6658f6ee07b6ab220df3f8a319f7f4a6dc9d7f71f0fd81. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU1956044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22d96d119dbec7eb466865f87d41b5b0dff07ec34d2ae953ae0be8c01fafed0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU1956046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3688e23ba832d4f722ae49b7351264e332a4ee06cfb50f98717430f5ec4ce0c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU1957650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91afbb133cc5e412be0331b6b2f65b17ae00be729fe54dfc2c2bf26daf666b18. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU1956060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562961a43a961fb45a2c4989b837b5e9e8d5615497d0403b1839d957de374178. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62407862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4a61269241963107c3734fc8831a9c55f907e5a4121c76dd8b173966e23962. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV62407863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b65ca4406d89e067570116d3d2e85275d19747027e5c3d7156bb26b40caea9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62407865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1349e3a25cc21e44c8049c255cf65bfd799eff01785aa08e6a643bafa83b0cb9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62407866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97697d9ab52907732b168172292448a6862003274e1f72b5736c507614ba13e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV62407867.