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 0xa4e4e3b0b983e2d0967971f9b71e5c8581ab25c357f82d32f8ec5aabe975af36. 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/bcc28ebd-d831-4ae3-afb4-9dc6067e6e36.json and https://artists.proofprofile.net/proofs/artist/bcc28ebd-d831-4ae3-afb4-9dc6067e6e36.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 0x6978c19c1faadf90b3a7cb4aa8951ed4a3784247a3eefa4eb0af5d15ce6befca. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZANL1738676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9334d715182b68f89f38ffe710c390b6d8af80481d6391eace051816c9c7f66e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QM2PV1829440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4912f5823d9b5a798d02a41d2692a452ec1a2a4702a5faaced5b5bd8a77039ab. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QM2PV1829443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2baa436c659094bdd4627033f0b37bd6f93550f8514a48032705dfef290505. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM2PV1829447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bd1482fbb691ddb9684ea7fb5fc3aeec837a47c91e8a30f3f9db5c7d45876a. 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/QM2PV1829453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae282dab40255cc544be066803e06ce91f7a27e2cfa4cbb8ae82d1918416fcd7. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZ4JJ1980467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55400520c240e16a2251392957e730a836646886f7fc86abd1c7da3bf62f5d05. 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/QZHN72011378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a75f9c1fcb22ade572ec8759ad0e0f8495b68f4aad7eaa021dd45352a244c49. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZNWY2178365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64322b804631ff3d9398b3a95b59b9ad2bdef187d11ee84b27cac8b7010ccc5b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZK6G2291890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735fe79d017a91c94f78694bb5ef1713f48691f7ccef9ad50e1eef9e7ed578b4. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZMEQ2242610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b7d734f91153b612f8c4a8b59cf8daab346cf69bc100afb777896fc9ab6818. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZK6L2331848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec6078ed694d0ef7152be52168899bc70936ba9aacf61ad4f836d5a8c141191. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6L2331851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875313cef5606a91a55dea861aeb69282e8c000cb8d23c4697beb123f8d8aef3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6L2331859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c1aee07c49a3fcf475fcb92c9cc95a78bafdde34c06c986002d7c5c8386d09. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6L2331861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaef9fbdefac638944ba511f33ad2d64b6bb1c6cb01ff8bf4bd59b6cabb3edad. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTB52304828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df93862a83b1f9583688f0e598a9883724c95885b5367f8a01b970cbf532cc2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QM4TX2477040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2b5365a356d8e41a0b9a17e8827402f54b3d9f5b4cfee6ef555faea8912722. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZNWY2460822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a1e83c49214a2c1d8b705035fb62bf906d2f0678ed188c5f78a8b958c4621c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFV2582018.
Dikke Billen Holle Rug (ft. Mc Chaos, Lapendo, Valentino Ignoto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ee99786194bea442a840a255abbaf66834646d9fa9c5285767d0dd21a1c97b. 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/QMDA72279102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ee0ecc82d52054b5bb4bc6d1fa8b68a566989f2fb9205d22ac6fc4e95db675. 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/QMFME2375777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2cd180a3dc7480c6257c6ea25c171aa8d290b268ab2c5c1c2d7a9e234c4f80. 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/QMFME2375775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48471edd5cf4f728de3a9323edd8020bbb8fec84542233bb3b2fa7635ed615d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2161051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc34c4d9d7b7785e580a362c4064884bb93e82dac2170d2c266384c920ed6568. 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/TCAIK2491598.