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 0xbbfe443d48139bf6f51ad6f9ad7d7c9497e7135638044950938bb72e262c197e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cebe791-e6aa-4d97-b773-15853f737e85.json and https://artists.proofprofile.net/proofs/artist/5cebe791-e6aa-4d97-b773-15853f737e85.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 0x27a011b20c1353431393e1ec697f6619a3d12a2014e0a11f81572f1e924e5c0c. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEP551912020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53b8c241602e1e54f0be46891a6e43de4325b40ab82663faefc36885147893c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEP551912022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9127182f84dd736dedd1b2273edb82828c037fe199ec4b911d1eb8fcccbdd2a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEP551912048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b71ed25114770ef5ae08b7ca7f9742b4291c7cef589ebd7cd1481de89c5c99. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEP551912049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a02165e08464a773746c21ba243db4bb400d8ba6dcb13e2ef726e83858075e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEP551912050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77415fe93117249d2a7384a4947cd02595ea2def5294790f139bdc39a20c2678. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEP551912052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a4986ed6778c438cb49e6c32aa513979aac9021c0032dc5f1edceacdba1bdc. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEP551912023.
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 0x5ff506d1078e259f02bd8b8ff9b052eec10ed190d9b536da36a36e4ffacf7c53. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEP551912024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589b7e64afa4fba3661485c1add9d1b8dc9f3209b291806aad3b2d5edb128094. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEP551912025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f62b8dc0cb030d0d1a337a96720f98fae19ecb478cda6c2c14e8eab448ab315. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DEP551912026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8c5c5f55a4866338e3b7646ee160cbb067330c8ad49d9629a4642c2fd87b55. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEP551912051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6151b5ff70ff5c1f995ee62b8027756666aaff8b16f3d0e101326851352da6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEMJ41100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797aa56a35364c30615c3508d154fe6f897585d61707f7fb4959dcfe6d94925e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEMJ41100232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7991acfc250644926a6e0a90765cb9e2a161c1de0343747e6c0074d3578e1066. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEMJ41100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc242becc96e792c90894e88653580e8a4db13a9693727eb3f5dae457981ae79e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX5MX2255085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f0c887296d2e3550315acf8d0c127d69495973019143bc9ac00e1f52676f7a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX5MX2255087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0dff791887501c07ad33a7dd99bf86344092f9714807d749432c948901d808. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GX5MX2255083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987ac376c8ede7ff59915112859c11b0a5ef653d5a1ec03d6e72c6ea7899e7c5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GX5MX2255086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848f73a401d24a04ce7126482b6d6624ebc55a843335d0060c22d85f3136160f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GX5MX2255089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf295cb130a2ede9f8bf6c6612fdc4c63ad1f66d4a6fbaef4b8615a076daad14. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATC150324301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7675ac622b2a1f8acf9da18d7e8bde0e4be48adcaea8a0e28f69c5e3163092. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATC150324304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1943ec98e93aa2a83baaea1ca57f02315da94a60fe781ab934d0026711bbefdd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATC150324306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bd5e48d401780c132c8ff157417ca16d400e0470b972e7e87dea4a3648d016. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ATC150324307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664f5cd1485fc0a825c128d5a5f39b57a155153da5d351bc0fa17aeec24a3ebc. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ATC150324302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecca26a158ec74484531ad373ed3bd322bda95f3d4673339eca6457357588827. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ATC150324303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf3f62522e4d83aef16d84024a24b6b9d56de55dd57afb9fa768a421e2a4f0a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ATC150324305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10af807f7a421379ba1d37f299e9785d796a4bc3d643e446d78567021bf3134f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATC150425705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4b1a6395e48d53d97561a3e5e6e7424f94acc9b50a2ee7aea1a1a41a7981c8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ATC150425701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4411a6ca2ec0a8412b2bfbae0855c8230cf74c1caaf5c78c2d64eb02a27be0fa. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/ATC150425702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881c3a04d3d45f22c7511db4e8958b26bb32efc2ebc0be03f403bfa6ab400441. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/ATC150425703.