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 0xc2429b942f3e0e5eacf0614fd3ae682a02a019bc7e5e663966dfa6da0ce8bf9f. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cc8a956-1eb6-4100-b372-0a955a57bdf6.json and https://artists.proofprofile.net/proofs/artist/4cc8a956-1eb6-4100-b372-0a955a57bdf6.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 0x05fc978057ab3d6ad503c3b5c7e1799e7835bb2f75cef856e35d5195b3aee511. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/MYSW10890204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4b01453deda2c3e0755d0b483152077470c2144e2731f6c906a9a7822a5af9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKG732270428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71549f452a51fd213ba23e92f1facd95ce616dd1e9b53d1394ba26b2a4cf75e6. 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/HKG732270430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d40b4929b59e07a1a41c4e88ec4d78a942f318c89bbab6818e20767ae7a915. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732270450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31c4ac6a5a00de5575f5403dba813b5807c091d0359b688bda0883e211ba881. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/HKG732270426.
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 0x025fbbc304b367b069e3091cc6472ca02c69bca3becc2c7f2fe7fd4488e7f8a9. 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/HKG732270404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0604dd965574340aecbd8365523c9b47b80bc1badcc02324d3ce15f342d9a421. 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/HKG732270413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd7898cedd2cfdb730f170d514516cc98caacc2131e99f1c07973bf8b6f4415. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:59Z), 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/HKG732270412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1a8c3f873679bc28206e994d28ed29ba940f62966a084e65a0a6739fdfc3e5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKG732270401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde69fcd5a6c47adf6e4e8b90b4a85e518886c01deea60268f929ad52c6813beb. 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/TWA559803101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7039636ee2167d159272da6b1118eacf21e3e05ac80e97e67df712fc60c542. 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/MYSW10891306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6c23678985f3fdaf0b784ab364bd61f003d15e5f8a25ab2231b4e78b519dff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYSW10891217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860bb86596ee85acf4423ced9ca45b07908472525ef3ec838caea3dc59e1cf74. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732270494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40748c0e69213de615bf0cf98327887636ba6880c8e96a99b59387f8b945f566. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732270336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d6b628f2d082705659850a91b7dc97cab8e232cf3375dc52ac06d0dd837ef1. 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/HKG732270514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01623e442962eba50ce1ba503e67ce2170dc6d84ecd59aa607781519b37249d7. 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/HKG732270519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4e01296aa1d646df2b673ed21b2620f8b3714cb7917e522e13efabc27a6356. 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/HKG732270522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5d53ff07d353dd0e9643fe887e8666f3927f102821a54553de9ba1ce02a5cb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732270504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09d8c1a465c6ebe466e941d774ad12704de118502f6340ebab8d3276f0e32fd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732270513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31367645d601e073a36037d26aa463d4662a9a5949ddd8450619edc2d14b8736. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:05Z), 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/HKG732270509.