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 0xbb69e16bfdca55fee84c5d6bdca8afc5ea20fd6c954362e8813c2cb81cf45bd7. 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/4e14f602-b173-4674-b1d1-0c387e938830.json and https://artists.proofprofile.net/proofs/artist/4e14f602-b173-4674-b1d1-0c387e938830.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 0x254ed844936b2825ce29d2d2b773adbc733385cd84c0efd5a7feb365469fa2ce. 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/CZUM71100247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b90c9992caec94e54228fb8cfb5e78e1aa6fc97b732e649533e1d152a8ee3d. 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/CZK811571701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053a2148ebad176ccf995df1f185bac3d7f60968a243117a9db101df8542b0e2. 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/CZK811571702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6910d67318511846d90117b7b8fe09f67fbb97e211750d5cfb87cf82e0a75d. 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/CZK811571703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320f2beb37a90aacc5ef347d1a71795e4d964e03a8ce46e569a855353d252251. 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/CZK811571704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc535fae84936d3d91457303a79f086ceffea8d53efa6aa9c5357383842543579. 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/CZK811571705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a79dc5a0a4035b7b8e29f3b3867a002a905d68449b0eba3ee9374704f851ce. 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/CZK811571706.
May Morning Dew / The Snows They Melt the Soonest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0df6fc4f685306f768b2eccaf4bda7857ca09b0c0f275aaf51c859ad02df175. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CZK811571707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bfec31b100412d8d7128b4196fcdc6741e0e040c7e7ad8a2245d6f76ee39d1. 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/CZK811571708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ef073545648e910a099efcebe205e3629b952fb8ceaa91007d6b8420b71ee0. 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/CZK811571709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb77b4d5e25b574628ab72933b1b3f8d3bfc876d7c4be379c0acc1fbd719e517. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/CZK811571710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe0175f53b7bddf854e67102b581f52923ca88015679ef5dfd0cbe4414f627d. 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/CZK811571711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8617b408fad147954af5cbc152d62cbae5b822a55ceaf4ea7be95a29166f4fdb. 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/CZK811571712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a22cb3b4b1f0a66fba3acd14e3ebca21e8d918612e17c26409c806dadadcfa6. 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/CZK811571713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b29b5bb3fafff15d55d534d12b520be4de8b87cef977628bd4138fa613cd20. 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/CZK811571714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b73d6f1a85a64342e8029eba0686aa5f5f9fb6c2824cfb1f4ee26792f7b22. 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/CZK811571715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3e245ae5d3381d548747b0a72211f8bfc4d72bbf46a97055185eeab2e931b1. 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/CZUM70700516.