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 0xa04eacdbd34146db6c9a34a8f058215bd7ad7018ce47779d585aaad03b7b1dad. 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/27f11369-e6d7-4766-bf3b-ecd63d01978d.json and https://artists.proofprofile.net/proofs/artist/27f11369-e6d7-4766-bf3b-ecd63d01978d.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 0x06712f06e353cadac81733f9810fd75bb23a9261b0afb11d7f16a74d8cdc5611. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:04:39Z), 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/PLJ621300758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a498405aca5963f95654c8adda3e4a1ce4835e94ece743004506fc7019b959. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLJ621300760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a71ed475b56301759225c9b655b76fabc84d650f20544aabfdbd51b922251f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLJ621300765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48f69c7ef4e0cda5d6412998636d4f0ae065f0055fb9ed8ca0d2d26de3440f2. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/PLJ621300775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c355d8a86b624dd424dff8917b1fa6195060c0d2231bd2a66b609649ecc1cc. 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/PLJ621400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d35748b1c423094dd550afa4ef30073bfec490af3fb155cd27b2503f57218f3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:22Z), 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/PLJ621400061.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bb9582b500d58d6784c4875377b104d339fdf306353cfc2fb4327d4d3b239b. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/PLJ621600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a85d87d25c6fb97efba095a03dc917d5e52a944b1b155551d88c02fcd81508. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PLJ621600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fe1b14393e96b5bedd05e0d7d7647b01a1ffdcd840c773b48d9f95cdb4f154. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:50Z), 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/PLJ621600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da67c4fe1156f4a75e8d5b45eb4b20f5baea286f21005315bf5f5dfd158fec6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLJ621600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0fc6e7f63708484ed7c372b67e555ffe653e13738696391515b535d33ec9b9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLJ621600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea0b288fbcc96a4580a720a7881a2552d3fd1fdcf54d83e427b8f8be19d6a20. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/PLJ621600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb4c085c7e58317fbbc42dbd6ac8144be7e1805e4e9e29b4f91129e085437b2. 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/PLJ621600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e20e7450bed5f2ac81b701b4445fc8d1b6bd5b954837b1afa780e3e6189773. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/PLJ621800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09669698fa53fd6bc8c903172dcac0eeb7cc62eb95e2147becc4c4b8cd6e3f7f. 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/PLJ622000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6499b529ece45d71f1765ac066ad6f9b0a71338f8f2d01c666beda51fc15643. 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/PLJ621600087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec64df65e30f9041d96ea48655d1b444a56030652c0c3c029c7553eb59015f4. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:47Z), 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/PLJ621500558.
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 0xc3656cda4c350250b5953a60111528bd0395f5bc4d3884859cbe05d0a4e76fc2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/PLJ621400201.