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 0x66101c7845923edfc11784bd5205eaa43a6151ea068c608e9faa975bbbfe53ed. 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/b2e2dc7d-f319-47df-9397-63128461d080.json and https://artists.proofprofile.net/proofs/artist/b2e2dc7d-f319-47df-9397-63128461d080.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 0x734273d4c740387bc90c82a9f3fefd769719f26fcca439893c07349afd7723c2. 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/QZDA42111549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737ec4788cfc6c1e48d9c77db8038fb1a6a731fdaf983c2376ad4a0694469540. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6H2069139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2899418adb47490be175bffd85ee2982fa9442d2e905304050661bcc4b97875e. 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/QZK6H2069141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675e9b6e869c08980bb0e99e221159f9058fc2f45af2bcfabaaf1ae297d20f33. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZK6H2069142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3726761030d7e84f53afe5ce0b48e47970e9f027b7b43c1e001f03f5d773a2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6H2069144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc332e5fa8cd6b2a46bd2e1f308a501189b6b2a26e86f090c156917f1df1acda1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN42097355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdadd1f6d29d593a39be2669b22ea6db718bbe5e43b591a7896c4485d1771dcd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN42097358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27e44e6e8e9e4909d0e00e509e54bb0c98afa52ae67ccef77a3f88faf45137b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6H2069145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeb6e74853b885fbca2cd27cef0e6f87739db22ac036ee577246abc5d1c8e31. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6H2069148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66cd9b06dd1a7a4bdcd5c8579768f87dd42b720f51fc4c4bb8a17303c53ed28. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNC1915018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd600eeded313207671388356a5894fb1a7173ca1d0948d21ae0b8354701d777c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:10Z), 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/QZHN42097356.
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 0xc313f8c0ed2aa96b381b20f1d54a116a2cdfa1beb784a36e03733b808ca4febb. 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/QZK6H2069138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74092c66df071d58f45acdfb0f35ae40943aa5c05484a7d0c11f12049e6199a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZK6H2069140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89479a0de6479a706395b05ca86dae6c3c6c5d5c69e415ea31df2739835148ba. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZK6H2069143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0738cf48a52905dde52120502d71d2a1951e6b78b955ad72e3adb71d98502e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZHN91958999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf84ac215e6c6cf68d1c173860e9974a0617f00b5bb17f6a97dd829bbb300831. 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/QZHN42097359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f65fa7a3c4ae1b464b8a55365a9b61229c3cc113245d0799424726eec047dd. 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/QZHN42097362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb038fa38dbba859a1cd6a8bb4d25842966aafcb0d089fb29118b4b90487584. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZK6H2069146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3384f432bebe720e52099869a5dcd150dea3849d633ebeefe8aa4039827680. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZK6H2069147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f222e8d9e0a575b7d4545e8d087347a38fa3e92dc832242f2c57df57ce983e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZK6N2058031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e61b61bcf63247fc15db4ae66b001d79c922ed928f6df7c18127a39fff844d. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZNWZ2154443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00e55d1d76807c9fbca602bd3c33a9dcd4f9d425d5b8f07c18898311593a1e2. 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/QZHN32243698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db7765bcebb0f4555699b392df0cc29fde7a0eff20037ef5d4a0b8d8d2c2865. 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/QZMEM2290796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3e97f9f4639ace1f4370c8e453fd686d076a4d7dfe43313e2d15ec52205149. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZMEM2290797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42170dcc2fed84ee2b35892e6ad23b25c8485df15dd41e1fd196c80beb7741a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:25:14Z), 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/QZMEM2290798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1489a2f0bc797733ecae6f3db2d8023697d93e52dd5278a0da449e3ffbd34a3a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAU2236837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4a4767d047bf707936e886091835054d304ddbe3c38fa0d6401bb6d8658740. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZES62444311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55d0054076ae8c1a6b757f1535112e3ee1f0287e138acbf7b8b1eee9fa7621f. 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/QZHN62425530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde305ddae710659342b5112410ad093fa21fcc20b4d3723b98655cc1e9668bd4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN62425532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4483a3412a7fb298501d52f8c74f5a341beea972f45b92eee54ddb95c711d8d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL2BN2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8091ec4cd60f3735ef293c3580bd6d0083be26278e8eaf207c2966bd6e94c69. 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/QZWFT2473396.