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 0xb1d1247d6a197eeddc7278951cc1514b509a5fdf7e7fa79095ced5babe515e5e. 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/6db8b4bb-c7d2-4cd0-916a-cbd11788e363.json and https://artists.proofprofile.net/proofs/artist/6db8b4bb-c7d2-4cd0-916a-cbd11788e363.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 0xc46728e63c119ca6a9666bc350a644b52df33b3b00929bc99bf9da3cd890f8e5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:42:17Z), 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/ITH521311196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe937eee66485372db6df1059b5607fa68892b5abc7da5507b583eba14192b3. 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/ITH521311197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80838b66cdb796ecb1917846844922f46970d41fc8cb4b72a8d936964f3e7941. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITH521311200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eabd13225bb127577c48230fcf95a9f26b6d993fedbf4570e65afda12880c50. 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/ITH521600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218b031b019104365061a704069ad192740f7214e5a68a032c4f3d0779779cef. 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/ITQD02015601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213222af6492a73ca93ecf0eb35376a67652eae2cde1839a13fde227cd9857ba. 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/ITH502223001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bcd85be4f36cd36309f9aa1bc35dcafb57d95727981cf39c2b60a9ee08690a. 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/ITH502223003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c8a30887dfcfb70829fc1c54fb3f29d10074525f230765171950e8efdca42c. 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/ITH502223004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad3861e427be2704deb466120b89bf780bc28246acd17b0e353f7798b77fb67. 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/ITH502223008.
Francesco Di Bella & Ballads Cafè (Remastered 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5fb45ac7a5b4390c8782463b49d3cc7b155129b608eed4f501305cb3eb03d9. 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/IT3RS2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a680f7dd33c3e49b11ea5daf8d63a7bb59770445717805c2620a256503e1e67. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ITCTT2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84240d3e7449d4d20665e27a3e08f8196117a6e383cbd9a802a69c847d6fd081. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/ITCTT2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53fb3c0989ae9b7b8fc9d2d8abeb4f17ebf60fe9c5cccfff800f2b82d4de656. 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/ITCTT2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f74ad5bc11db450f16aada5639e701448262344d22f8df6faa3a2c156fb940. 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/ITCTT2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ae6f535e49dff6b3482b5c265a8561432d232758a6dd36d60e474a422aa67c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ITCTT2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68dcece2cd6dac730b2cb96161e78ff95e3b944bf806695dcbd4a39f09af82e. 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/ITL751400214.