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 0x0e9540e7b4c42a4f9cad7c4e16be43506abc6f438e975734e817edb1ecd861b7. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6844d2e9-1d74-4957-b174-f04e62c9e46f.json and https://artists.proofprofile.net/proofs/artist/6844d2e9-1d74-4957-b174-f04e62c9e46f.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 0x5c0a6b3eaf9df0ddfda15bfbfdbf95bdbcf58a911da2ecc937bcee063eae8136. 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/NLP972300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ddd1aa860b5ec37fdbbbc8e585d0251750fe8530c8f798eaad50a9faf8588. 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/NLP972200007.
Dorp Van Hop En Van Mout - Live in Mariahout
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882aed93e513ed32c7db9cd738b5b6343f9d59d6d9bd75d2443d98f4ee05c5ba. 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/NLP972300025.
Kind Van De Zon En De Wind - Live in Nuenen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7798b67ab319530f73e4fc64b792430ec8cc004da6068877b1dd3874acfcf103. 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/NLP972300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8303f0bec02d71dd200cd5e99505cf6f8db6d79a9a4c3e4c7ab6b1f2dcc2a89. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/NLP972300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07fb5f76e51bb68bfe0f21e3e9ebc090f88ac2e15b75ac18fcb2605ead7baeb. 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/NLP972300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07fb5f76e51bb68bfe0f21e3e9ebc090f88ac2e15b75ac18fcb2605ead7baeb. 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/NLP972300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad4529c0cf40bf59f97bcfbd617971b4d8c692385dc73624414d205019031dc. 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/NLP972300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f775a6cd3887c74b479b313d0d09f3d36717ca34f76c5c11aa1b5ac3f291fa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLP972300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55d7a8f03e68d9551e6f4b40a78e899e4cc6ff522d7d8c889808d6565444a38. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLP972300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c593347476ab5f1e79c803b69316d84b017f0780898e4116dc21090a35659d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLP972300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223ad47710606d292fdedc263c4f7d19b685fd0b62fe7189c03f0eaf1aba4a21. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/NLP972300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361ab08422b7ea910c6fa9bc16c2280deb4ca757cdf6c9a969bb8198abee9e23. 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/NLP972300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f9f51c18ca60abdf18952556a6504d0257dcd2aa800fcf52dad13ca5fca85e. 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/NLP972300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811cc74ff1d62cfae653c6f76d9f7bcc5ae20becd70996c5bf45967990341f62. 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/NLP972300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290c149bd772ec4ecbd148c5bd9bad7b59f7b711ca16aa709517f0dafac8608a. 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/NLP972300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6795136c6f3b72f271887c8b5849de55345bf17c3f74c6b8b709d36a8c283b. 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/NLP972300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f67b0bec475582a8a04723a4d2f1899eace75a7c11cbceab9726c3ffbd3f64. 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/NLP972200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f893b9a3d915bebe7e6614a79efca544cea3cd8d702f82dd014ec80c901244a. 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/NLP972200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9759e8218dff45c627e52e88c49dc37a87299117c062dc660130ec4db978ecb7. 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/NLP972200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465bafc6b60fab8f7d93ac82d26561ecdfc438277a1c78319cb26dd57c58cee3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLP972200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966b6a4928a744a5ba750c794d9906bd0b053467fd82c717dbc416e81fa0d25f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLP972200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a0ea359561c65daa51eaaf77a0f69b3ca8c21eac177988964c40c5db86cea9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NLP972200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0058dd1443533b791019d00097a71effefa0dfa3f2cbc8349ae3f52aa5ba6c6. 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/NLP972200001.