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 0xcfeeef3640ed05e98e0920385f90869f6b93ffd2b4d10b2a574ef88194b7b332. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3ddbca5-80d3-460a-a20c-5ce4afb33c3e.json and https://artists.proofprofile.net/proofs/artist/f3ddbca5-80d3-460a-a20c-5ce4afb33c3e.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 0xa5fc118bd2fa7e35555b7289c24c2a806b0bba6b49995ab3538fb50aeb21e278. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBBLY2108539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca8c98c1e0b77ca78169cd39732786b9fd81144c719681887507198934bc490. 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/GBBLY2108540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad56557638654df766822430510bb7dd39909b97eeae0cdeffdb60051bc6f04. 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/GBBLY2108541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe27292b6cf9e61051d3e0f56a848014505e0b3a1be4c55b3fbbe2c28646813. 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/GBBLY2108542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78382d767ad1b18c416f4a76bce80ec23352edb2611f7f755f48afac331d6465. 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/GBBLY2108543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6265b74ddc69d0e75f3abc99efa4816de7c6fdbaa67b735e6cd50781bb31560. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBBLY2108544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e0c936b5639b18960cd6ed2d0b2fec872b0df1f0d7c0250bcd304702ca7985. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBBLY2108545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea998d425572277ab85cd429fb3f2cfe96e83c0691be585867df8d2f23550d5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBBLY2108546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4b1bbf04dc8841df71c5219d151c06fd3c7d8bb09dfbbadc757ded9c3e3512. 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/GBBLY2108527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5def4a790d675ca831c17b990fa935de3a27615f89d85b51de9a1e22f0c1a191. 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/GBBLY2108528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa935554cf5abc0bf00487766fad254246fa22e2b6c7160cca3e9ac74441187ec. 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/GBBLY2108529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5238d9339dbb5ed209de4195d9e19ac1200c8a2b38c7fde0bdf0cdca54e252. 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/GBBLY2108530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd452de70e12fdc7543886b8f0f659cb6cc01d234f272ba6f915f4628a63c2ed. 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/GBBLY2108531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193bf256790af3a35442e9c3634258ff97cfbcd130d6646e190cf52fc3358895. 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/GBBLY2108532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e470340a3d4efb02793ee8b04f91e75b3a53cef64ffc5102cc1539b786d0a0d. 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/GBBLY2108533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98a2c33f7d5c4f359b62c9dddc9b12297e2b014df060561e2357bc344cc2e28. 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/GBBLY2108534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f44edfd47bbc562bf558e52c6ccf4412fc6e3c4c0b92bf69aacbdc4b000de4. 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/GBBLY2108535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00d3f7b2b56231f4f378dfdccb234119218aae71fe2a774679b1c230abaa33d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBBLY2108536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83209dff834b77fdf98e32a77ff499df27cfa983fd2d978b223016bd5ab9d84. 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/GBBLY2108537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532c7cce576b55c08a6b21dce25d950224cdc5fb6e2dacf607cd746b66538cb4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBBLY2108515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf93fe66577e030816fdca27ec41d46694b8f4a1a6b1dfe19a95844c7bd7f9ba. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/GBBLY2108517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34a4a7df606c3ba5034c70abebdcfd5cc0a698405085581361c28e2cc56d325. 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/GBBLY2108520.