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 0x13f4b39d34090aed306b27e8496ab9788bf1423a84e6e26fbab32a6edb78cfce. 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/e8d098ea-a8b6-47d2-8a82-fdd6c7ceb524.json and https://artists.proofprofile.net/proofs/artist/e8d098ea-a8b6-47d2-8a82-fdd6c7ceb524.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 0x906216b6c2c34de1f8df34cf053ec09969cfd09b215676417ac973dce01d09a4. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/GBMJG1914865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9bbca1c0102e606d2882d3ff0a40169468e178db29c7b8db0c37a3604ee26d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAFB2022685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa977a66bfc4e3ee4d8d017e9d1d25164f0695810039bccac6d6e33ac5cae6f4c. 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/TCAFB2022691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ef2140b4b85cba1f934ee207ce764108ed9fd6d1a11ab05ddd112c869fa0eb. 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/TCAFB2022694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30c99c2955d49042aa4c7a0695e0042d5fbe6760e940fdc9f25f40c35e582c2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAFB2022695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe277e950905761ceee54e798d9d09a576c6ed07e59d32deee51ae9ceb71d1784. 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/NL4YD2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f270d683f136d5bccd28b03b3762014138857e97adc73c3d14aeebeab60611. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/NL4YD2100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e2d0c84af2a6384c8b544ebc68b01bb9ca14eb4e36d120dceca4557b6c5dbd. 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/NL4YD2100318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edeae47b01906fc23d4bdf7e3c8a8df7aefd7931583a1a5a51cf8dafd47f002. 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/NL4YD2100319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd68250c77aacbd88d01158d1ccf642356ed7bc4e73d2dfe359b19e90e3c0a6d. 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/NL4YD2200143.
Fall in Love : MMXVIII : Lo-Hop Anthology
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1a97262019e78474156763122d6572eda6b5413b9b0cd7ea04a207c2fcac52. 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/UST8K1871750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93d1b746a4df19b92b3c31eafdb21af1c8a9d953b4127c3bc3fa135f0647d59. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM6N22297435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bec43b61225e01c3e1f4424fc606d5ccbf072391b9d47104ded8f68170be301. 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/NL4YD2200137.