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 0xf7b4113c6b638e6466aade278b12db4d217e82957e511267d25c6f4b4f3085aa. 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/a0aa8c9f-5125-49ba-aba6-2ab5177f0ccb.json and https://artists.proofprofile.net/proofs/artist/a0aa8c9f-5125-49ba-aba6-2ab5177f0ccb.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 0xf10b0267adf8bc9a853a20eb86a0eeeafcb6448e8525bc61b7854534722081e5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLG662400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba261debcdfb85c114bf6ffacfeb20bb87fd8f9ce64063b9b0a902fb1517506. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:48:59Z), 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/NLG662400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e0cb70c638c131c2cf17cc63c17da6fc6b810a09a96e0fb0892e96bae9c1f3. 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/NLG662400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10b0267adf8bc9a853a20eb86a0eeeafcb6448e8525bc61b7854534722081e5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLG662400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb937bed8b3b9548041f3382c7ac6209bd10e447612011a81765e4cdbe4354ff. 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/NLG661700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b603e5cdcc8a274f180f04688ab5cfc6c3b3981342ecd1e124cfb98bbdee5d3. 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/NLG661600633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf1a340a430399aa5773a3615ceb7929c266c7208e999d39c1853e8783a59bc. 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/NLS241900407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c6caab419123d61301c8004cd3f5837b99d3efac9a2b520d55760958dbf1a3. 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/NLK2U1800113.
What It Do (feat. Shanee, Michael Bryan, Défano Holwijn, Jhorrmountain & Lange Frans)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b464b0a4f6b1d04afbfe1f14f0dde39a4a1905753f5817565a5eb3fbbf3176. 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/NLN8H1600012.
24/7 (feat. Michael Bryan, Shanee & Jayh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea087a26186db54276df2d7f29e5f872c938f778f87ad5d9e55aed185404d47. 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/NLN8H1600015.
Ja ja ja (feat. YOUNGBAEKANSIE, Jhorrmountain & Shanee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0657e83bc92aefbc733e2b02f9f6116df75e6657f3d1eb08a204ddc32de5c264. 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/NLN8H1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322adff638217b5008d0c374ece3f89839e3a9d2bad34b97a048d9386c7c7c65. 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/NLP1J1600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9152013f8ad814f44e2d2815597691df2292768da5e53513c9da6fd01f76d5c3. 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/QZTB22268117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f62753aa095dcde2fdaa6efe6914876093e09305c1b4413f4c1e797c0598c4. 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/NLG661700676.
Denk aan niets (feat. Michael Bryan, Shanee & Quessswho)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4416b6aadac7dcc98c1e5570675faed3a67603b83be62c499c08b72740c375b6. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/NLN8H1600011.
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
Niet in mijn tijd (feat. Shanee & Josylvio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8fc02e76ebaa9fbd9943331091d313417501bb29b09f6ff35186d459d8d564. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NLN8H1600021.