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 0x79fa46e9f4b67201e5760a14e1e3d913a4352aaec98104f5dc8567d432092908. 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/a07dd11e-9d0d-4526-bfd6-6d42fbf2f7ac.json and https://artists.proofprofile.net/proofs/artist/a07dd11e-9d0d-4526-bfd6-6d42fbf2f7ac.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 0x7c251e1040407a8d8c9733cfd167cc0ff58644282173912e992c0205904e59a8. 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/USCGH1856311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff07d65ff6661e3005d9c2dc5e9e0b75c39e934f295f22d00f7652c0aba17c8e. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZFZ32000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3aee265accceebcb880f84afd1a33232fe237a54deb0baabeabc33a4566164. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFZ32000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dad1399e3bba1eb2c5715cd4cb8bd5a93ceed82ae57ed08cd7968671442763. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ32000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033ca1fc9bf5f5dd6e1cf81e3abb6e7005f54791503fa38a29568b1893a30c4b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFZ32000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79480940c71c4f6cb4dafe4fbec4f74e55ceaf44edd2969d0476851f8030339. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZFZ32000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99e27cbb96ba31277bf6a62bf56547d2f413bfecbeb0b1a594f10d55fa91257. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ32000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c41be9137ea2cb19d20aacd7671350f21f4fe80a189aca52365e36661d1985a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ32000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdc6d30f12beb9da0e11f8a3e2ddd7d19e4974099af1f3b438c67a82c722627. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZFZ32000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb683cf86be6760fdc76fff6d409f1f37914fa99b1eeb0b5de37d4d60b9835c0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ32000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad00753e9f0d007289a231ec7e5edf8739429c0051f3a235c4526dd3618b9095. 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/QZFZ32000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56fdb62a152b7d98e2d8c1a7083e314323354d1d034a14eccae9f6e94f7942a. 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/QZFZ32000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9393555ba91b724a2c60bae4e165e803b4f179830971c7fc1a0245ef6a64b9. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZNWQ2080578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4203815c0ac23cb5b8027c2e7a81d1b67339ffcbc670ae780e591af65dced5. 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/QZDA62107496.
Ya Falastini (Vocals Only) [My Palestine]