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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cfa27c7e211039a42a69015225c3bc635d54d520a2f6224c715c4c244ffda1. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b116924-97a5-4f46-b390-7b2f0f6b104c.json and https://artists.proofprofile.net/proofs/artist/4b116924-97a5-4f46-b390-7b2f0f6b104c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe674f92daaf393a655d0e720dc7a17ab25180a697325653aae680b0e9d461a3b. 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/DEZ072100733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51c59079cfda77c78c47a61262f96f10f9932abce2887357375cce8c94df673. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZ072000656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da0adac30967b03707b0d0602f965c29943ac5f1f8e3898e15e00388a01b0b5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEZ071900367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9bef138839c976af60dab7f26fc382394f10732bbc49f0d182a44386573767. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/DEZ071900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b0bb9e2da7b2aef9dc135af734b5673df423e2e142dd63baf4bacc7a81f106. 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/DEZ071800237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee6e7043eea5663cc224d408fcc89df2165ad908c4dcd26a05dbd97234acc07. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZ071700176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3318d9bedfb30d8039779eddc3133367f312c13f36c165d7244c8e4c11455c20. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZ071700135.
Mużika Mużika (Festival Kanzunetta Maltija 2021)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036b856cf3c2a371ef4ded68721827417b85bd2df90356bfa28c79c482863c96. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZ072100680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9f3ba1188df088a654dee0e6d4011d540b57b755d85922236625a140ac6bdd. 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/DEZ072100682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8845a23846a840cb3c42b12914446302114554232c49c6aa315ee8eed5e6d784. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZ072100684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1816ab6ae0cfe267a39ea8959e95f977d1124445bbe73cadcff2ff6dc8417223. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEZ072100687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f32ec5472c36859c3d8f8d429c90c4ebd69ffc46c178e307d0e0b044a2abc9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZ072100688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb43c22dbbfcc8c0244f5096e302fe310e5b41bfbbda1a37290a5aca1c064a0f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZ072100689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214a0932ea31419243e357e77b98bc9bedcc2e010a26e8e664c6774fb3581ae2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZ072100690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815d8d5c800a12f1a54a4eb760d96cbb9dd5e59c49c7786a0dda0abd2fa22b4a. 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/DEZ072100691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3441bf365f7908840491463d337a88ad24f3f9627f1f04519006cd5d2ee93c9d. 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/DEZ072100692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e862a9fc9583a179c8658db8eed2740acf3a1cfc56f04ca5aa01bd2a4c02cf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZ072100694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0488b1ab4f6362a4635f379eef7a2ba8d541133bdd64727c3b7756c6cedc702d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEZ072100696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dffdcb291473e35b7f0d77339b2c882874517ae0a62442fa1a1627ff8d29aa5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZ072100699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b29a87cc9ddd85c794ae7385579a9464ae9e20bc8348320b415e5c0c33077a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZ072200790.