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 0x09ac9a7668ad291901f6146686ab465d4c319b5e474aa4613dbec32297833e1e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a2d8687-7fdb-46cf-b2b9-cccd54ef8553.json and https://artists.proofprofile.net/proofs/artist/9a2d8687-7fdb-46cf-b2b9-cccd54ef8553.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 0xa5b914b9e9aadf04c8a843042aefe93c52bd8e766e20ec955b505ea43ef376d9. 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/QZK6J2079638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdb883866fe8a1a9a1813f915f0bcacf36a76b5b43f92e49c1d4659dd4901e5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:21:41Z), 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/QZK6J2079639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe35e5968fbf8efc40bff2ef18e4f3dbfced924fa6e2cf560fff4171bef0c21. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6J2079640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fa2aa3eb238d13fe062ad5038402852b84fa114f0416dc4bac815e4bfae978. 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/QZK6J2079641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1772d4b1a8102646dfa594f2f055ec9d8217bb298a1400a4c5cd2a2632285d6. 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/QZK6J2079642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfeeedec1d8f743f132cc8c95a7b8913759592dc8fec47057e0f1d68889d437. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZK6J2079644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72485727062c6cb8d2d9acf86e03e41a37b1abb3dc153c3c7b25790025e067dc. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZK6J2080523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624a9a747ed3c306ab615d65bbf0c34e8a78189bb3be61c9854ed0294f5a722f. 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/QZK6J2080525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0d1bc21620a0cd9bf1ed05b9978a9e8e7602e99c01ca32e51732514ca1ee0c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:53:25Z), 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/QZK6J2080528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f74f0d83ff7e644c53df8cd6c980bace2e20ccb877ae5bc39bd039678210821. 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/QZK6J2080530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421c22e932432f26e0e1e7c4e856ffb482247ee3334fa4b9b09a2245ff7d4fb0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6J2049250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0f499ce37162f76d7e44e77805fc15ba2b7ac156f8941ecb30d46ae9383c0f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZK6J2049251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626ce07bf595dd413d2f51c9a41457c52ff945a5b9f2c231b187e8a14de60c1c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6J2049252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce08c5f04e15b705e0f88f9efac97d03ab466a560ed75222d2a168c557a17a4. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZK6J2049253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1dc5391d373ad97c6112355f21c5c46f8c6bdcb6f465816e10bc3eb498fabd. 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/QZK6J2049254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1864b43a92f09abec1d33ea529d1a9b79e54d4a1785deb6f0f9a3ed080ccef. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6J2049255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe119fd6f08d7332a1a4bf1ec63ed717ad0a54e4c546303f9c731e9bd1e367ff1. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZK6J2049256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053a051ff41b582d57df677344038b01e4834c97040ee9497dae47f96e0f31b9. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZK6J2049258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00d683ffbba0e0276e5766cf360281d8135cafcb119fcc7859b5d2462e9d972. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZK6J2049259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7b6bb53a76f615688c386316243b809da9031c2e2536b66edac2b0bf7f48cc. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZK6H2074987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ec642bd453b65926e6a04d4aba6d37f9fcb8bdcdb84c9fdfb733bd65e99302. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZK6H2074994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a482c4e5e441125c5b8c00868a8b712060e15d841e63bd31d14062525c6a22. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6H2074995.