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 0x0f264bae061b4b68bbad71f3c47c044af8b61b757adfc978404f4bd39430a06d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1394ff2-2711-47df-9e54-38f9795a7983.json and https://artists.proofprofile.net/proofs/artist/f1394ff2-2711-47df-9e54-38f9795a7983.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 0xa41ba9a690c8a106bfc6960c9c0e286a4e89e5939f86340723b6193ec622a0db. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDFP1957997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22573a3fc140e75b4e7a10fe7cc0b144b401f1ae3e18f12bc83f7bb995311a78. 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/QZDFP1964725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa03430be2616f834adbb89006b294385e379febeb1bf3bb7097dd072feee8f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BC6M22432178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487644b982509021e3e6dfd1f7f88f5814d87e38d2ceb52dc3021cbebd88511c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GX89G2543594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec929ecc9e4c818e2a1fbed3976f7593df87b2114637e69a9f590773f4d7203. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX89G2554289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f9fb134f10313db8d859517261758e8f65d969be5615fd3b05d8b6c0ccd744. 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/USHM82526445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4650b3820f5a3ec777775026f3ff27b0af67f9b61b25596bd163401d8b38f3f2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM82526446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa78668b4a201ad61d4174b5d9e680f4debee1320489531e51d250d3deec281. 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/USHM82526447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd6135fb53bc21f4399faad6a0b78ae47b93bda61f3dc4e78f3f8da7bc6e749. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:50:26Z), 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/USHM82526448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f7a5dbb49546d25e7944822f34c532a242702e30cbb4400f1c3d0ba2ee3178. 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/USHM82526449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7bcf7dda5bec67812ce493949c64f6daee65b3b6950ce32e1b6bb53a7850c7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:02:19Z), 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/USL4R2533778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3907ce5676d8af8ab1ee04849f7f8d04fbc9d12ac5e191c51738000740838585. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:01:09Z), 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/USL4R2533779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62564a92aa309138d15dfb4f6f0d2dc2b9ffba32d7a8a769536b5c2e50eac881. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USL4R2578832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6438c22b22c762e1b0888349cbd1ed9b5f93a26f2752f90a24cf1a2104c3b8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USL4R2578835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163473ba1417b6e6cb2764d2068571b92e1cdc02ce37508b06f4534b4b705de3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USL4R2578838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c86e16ce0629e3a8779bbd6eb0d7801d8e9d0686ca6e083bf3e3d8e96c1ae4. 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/USL4R2578841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffb096ef32cc7fe5634f142d2d48a7588984008027faa01e227a716651619ac. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USL4R2578843.