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 0xbedb39ab487a38bc470429e8c6e1865d441d014f325e317699af936a302b6af1. 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/bbf03e6a-6605-4919-b522-f07df9b5f780.json and https://artists.proofprofile.net/proofs/artist/bbf03e6a-6605-4919-b522-f07df9b5f780.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 0x6dbae804757ec1bc7d7b8ca5b4cdd988954dfd8cb4781c5c949d3584f208ae4f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DELJ81926859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd1da87a31e0a518d4bfe220eb2c0924813f7def2f1d1ae2c1f4a9055152cab. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN81973302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72178336d8f5815a6f356f31d2e0385787fe26169183ce6c64ddf4b030c8b3f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLV62018919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0fc7f6c1b1da4548f9e8ed094744095644a597adbeee0349e09c5d593f974e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:33:40Z), 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/GBLV62018920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4535ea202152c1e0055283e6e4d7a5e1daf92529f1cb21916e75039e9e11ab9b. 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/UKN6K2002778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42d572ff5f49bdaa038048cb001d26528470d8b323bc6620bc9409d9bf65108. 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/UKN6K2002780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42d572ff5f49bdaa038048cb001d26528470d8b323bc6620bc9409d9bf65108. 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/UKN6K2002780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb161db42ab0762b2f5725eeee1eb4b5288db7b093cf1d4592fa4259e24f398b6. 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/QM6MZ2277965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97e189c9c38f5951823c6d9eb65b3c06151d6faf23ba58912ba7050a9472a68. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/BEMU52300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a5ee13729e3ebedca124de9265c37a8d2a68828aeea2a23517d2a526c5643c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9W12439080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7876d8fd991c84d7ade7a2623d7379b45c68e9614a07fd05c37d237023aab83. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FR9W12439079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a5ee13729e3ebedca124de9265c37a8d2a68828aeea2a23517d2a526c5643c. 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/FR9W12439080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74628f1143af58fa1a2cb4268004e8dc994a0b1585cc51fb607a14bacf1fbe7d. 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/FR9W12439081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4123567226eace237f75d1adceb76f5312b0bbf4ca576010f87ddefc95c76f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FR9W12439083.