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 0x86f812b922482edeb6ac91e28401ef5f03854bc5f49eec6d700f7c7088447ee9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bbb01ed-aad4-4a81-87d7-c1eb32d074ec.json and https://artists.proofprofile.net/proofs/artist/4bbb01ed-aad4-4a81-87d7-c1eb32d074ec.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 0x1c7916bfaabf98417e160f5ed05bfe0cb33bedde7d33c68cba1c5b06f1a9ca16. 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/NLL6R1600303.
Door De Wereld Gaat Een Woord - Hatikwa Melodie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a925856b5304d1a52cedb0f45308494499398e6ca0fecefd47898bf520468c4. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLL6R1600304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d3e4a769542d4483223bad58aa8aacc41f06d0423a42bce43bf0aa8e369a4d. 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/NLL6R1600305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b8321cd3d2aa73c14d83cc0c2ae5504d88546187ff2c9ccfa4a362d7340786. 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/NLL6R1600306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405e9fd8b8e0de79e9d6c07fd950b9e8dc2434a3a31d41e1df9d86ad7fa51aef. 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/NLL6R1600309.
Improvisatie Wie Maar De Goede God Laat Zorgen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7744ffed505f651df3350b8d6febebfed1539a51ccbd72cd30498b727f95a23. 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/NLL6R1600310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16aa208a33b24a4a07da41af28adff1bb02e3e3cc4bf52481d27ba255844661. 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/NLL6R1600311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685283758320d89796887040e59147c8fe1dfe6a4e44dcb95ba012017cb65e2a. 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/NLL6R1600312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8245888ba0504a3c55c735fb5de04ac83775294c16e498e4719f1715acee028a. 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/NLL6R1600314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22f981aef044b699cc4d23c05bff99cfde86b6aa3b21febec167cedbe2ec054. 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/NLL6R1600317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71fb3c1b7d017cbe3b643ac3bdbe638adaf357e5abc0a92c44ff0751945b66b. 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/NLL6R1600318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289d0e38d6cf485274934bc0ae1f2561a1f093b17520df52101854d8c7b2580a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:25:14Z), 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/NLL6R1600308.
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 0x03b4b4790df06b2054a3fca14c83412c0f1c30b804b64bdccd8d897b8d7d3be4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLL6R1602429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad9461538fb18051e3234f47f8b67e5515f4649efd1a01b1d73e114e400bd60. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/NLL6R1600307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9abfd2aa4601f0edb0f67f068f5d874f84bb8163337f5f0d35d8071ea535dd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLL6R1600313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c40d7bf20e03db489a206b041b4bbe12025150f8363dbd87dfb41a6f7d070d1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLL6R1600315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf715180709a7016ac299319407d3387a56feefac185e242eacb8b39eb7de1383. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLL6R1600316.