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 0xf6acb420258d93ef95ee822418dc11196da15152387aa8d947c0d1b6440d0da7. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6b50484-8e48-4d08-a814-480a5bcf9d89.json and https://artists.proofprofile.net/proofs/artist/f6b50484-8e48-4d08-a814-480a5bcf9d89.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 0xaa1c55fdffc33ddc8b3fcad61613758603422715aad08de6facbe4be67502478. 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/ES75E2405241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc823097abec9d0a1a6fd073605818357cbdfec02889a98c02b9bb33f86bb5527. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES75E2405243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de3ac19460f6968a8aac9a9e1c7abc08110aa5ccd77d364b2fb12186dc45844. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:51:58Z), 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/ES75E2405244.
La Vendetta di Ana - 6º Círculo: Herejía
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22fa7645216e08a58bae9d8d6f90ecd545a71fc38d63d246dbe1de1d32f9818. 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/ES75E2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3213bac39241f4767e361c17dde14df20e0b21173aa4b93818b6b903eb6018. 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/ES75E2410699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c812a71501fdcddf36a37b9e3b22a48e7901d29580d5e4e20b7dee65c78b6e8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZDA52598782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bc90c20976b8c5572777d1ff9381632ae7a5923e35d8224fa1d39bcd1c2bd2. 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/QZDA52598783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c90feaf837231673cd9589041e8f2c0a6a71f4c7b0016df4bb9661be68cef85. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:04:52Z), 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/QZK6G2462843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdfd11b8b3cc27daa2d563bc0664fb61c2eeb94250f773224d364950d64a511. 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/QZDA52598784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5427f1dca68240c4fec5ff13e0165e04b4b1f26ac6424fe6426cde85bad6ec77. 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/QZNWV2453969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb1160eb8a3375981ae9ffe44d98fdf7eced1589aa7c8742273e5fe61363726. 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/QZDA52598785.