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 0xd6c0ae65ef04417bdb5662461ba6645d988b21d97a361e3fdaf810d2c74a07c7. 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/d93fc6ef-abb4-4968-8e46-f382529c9b67.json and https://artists.proofprofile.net/proofs/artist/d93fc6ef-abb4-4968-8e46-f382529c9b67.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 0x8202496c1fb5e5f28d9f7b3ec89f0a6ffefe9c6ac3e72c2a1c99c3ae1d39a98b. 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/QM2PV1861446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6c22551deb1161ae0b864462c683eb9d24751a489b89818b88a17ff6b4cd40. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNC2085230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019e141b1ce7288f6b4d57f65ca3759809bde1af0217ae9c4e71d8d7ff6bbdd0. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHNC2085231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb4ee47822803d2dce52a362aaa5aab7cdad4f3584aed8762c3f3a4767d84c9. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T17:03:21Z), 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/QZK6H2014385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5ef6570d82a436d3766b0e17193aea810682b6ad55fc613b94d93fb8655cbf. 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/QZK6H2014386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3e3f59f71b2648aa03cb3d8d7ca48c97ceb251e168c3e4bd5207c71b224405. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USYBL2401241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e4a855d1339af70a69596486645fe78ec6cb9f6fa09fce6f699a104ad91798. 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/QZPD22100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ead0a7aa3427f9c3d5d1bc49a4250d7dbed01d4cffd85ebebcaeaad882cfee. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:17Z), 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/GBTVQ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac6ed145ce49081811a85b2444d59058a579dd54d1e6168d6da5e91cc798bc9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBTVQ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6457d0c7d1eb269c07cece7339a8bb42d2b70cc41fbac4a924c7837948e69e82. 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/GBTVQ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c43e31795f5c79b580c19927adfbaf5323d3d3c261bbf586b59be90a3f8c04. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:06:10Z), 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/QZPD22100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39786a4dc5d7dc20d5d882320dfef59c158ed2285c5c47c981bb72e010871b8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:51:37Z), 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/QZPD22100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9627862dc8c69c118dea9a93f77e7b4385d3ebf2372c93323808245d459de562. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPD22100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50cf6334958f66f36d94c9f7485094010d8c0f8de08a500d4967327730cec2b. 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/QZPD22100043.
Dide O (Ash Lauryn & Stefan Ringer Remix) - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2943c93853c82a1ad3c9045f4f1603c25a4e4b1341f1d6f7fb8c591fe3946f. 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/DEG932404362.