thumb|Dik Trom and the blind girl next door (by Johan Braakensiek) The girl next door is a young female stock character who is often used in romantic stories. She is named so because she often lives
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 0xc8b98f1ef377796da9a895c1aa49b44b3a061ac8b163c42eb453c5c06186d433. 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/f83c65fe-8672-47ef-b26d-d13c4c47b2ba.json and https://artists.proofprofile.net/proofs/artist/f83c65fe-8672-47ef-b26d-d13c4c47b2ba.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 0xaa79d2347a8c9d47a83bdf62b8bd1fb5a91f3b89d11c6ce28f829efe4521a43a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPB600841502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74142f4ebdaef88c4b6b54e9ccbd124c5a7c2d83e98efea916d90f010b21f870. 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/JPB600871901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda092874564e5bed74dd5dc67d65140624c3d6affb13a68c5862f2ada941a51a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPB600871902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7847940b43fb1d8666944e90f7285b66406b67acead2914206d26cfdf6b0cecb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPB600854702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1e9561f5086913fc60c9754e9385608cdefbebed5f53400c0a9b98667248fb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPB600871908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f957480940557aad01584ec6cc1224e2633cbe0ad5a9929fc018a338fac12df. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/JPB600924901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8da6ca004b07452a47ecfcfe0e92dc1e4c6f0a269e92b765a4db853c82740b5. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/JPB600932401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16edc60fdf04bd2bc40730e65ff0a11c935f1fc3efbfde8ec79218c95e8d4594. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/JPB600975601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dbca457fe5561c6432102a570bb60ec4652ed8dd84b8761bac63a22043a056. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/JPB600975609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab767821ada18fd591ebe75d0c68e1410a7589ce5fc07441aa67dafe31d66930. 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/JPB601020001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bca2933b4fba5ba0636f547b523909e5e47f3290317d7f54ecb73a64dc173f. 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/JPB601104501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa834666b47ea3b836906904f40ec302c760aa648650b0f1cfbee11d2805059. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/JPB601222103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06ae438a55cbf92b2cc2b5c1777c74913eaf848e9b786986b66fe5700775198. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/JPB601301270.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1816de1441a7dff94d4947e214db5393e725289d0f028be55fbaed5c50f669ae. 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/JPB600861801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f957480940557aad01584ec6cc1224e2633cbe0ad5a9929fc018a338fac12df. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPB600924901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83ef0c6afe2b89e9a2c339296fb6900171d1b88478e1701b68216fabdfa4460. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPB600932403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673e309231a7ed7831c41e5b1732ab45e08d79f3bfc98186446031a9d9e524dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPB600841501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcb4981ce41d5de8404393fcfb3427d191976cb03dfc45d823ae5c9f1c5a920. 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/JPB601301284.