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 0x94fd76fb14ad81aaf53550379cee354d222e4ec182ca461146aa8023fdeb4ec0. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/256ded39-21c5-40b8-9049-d7e070fe8885.json and https://artists.proofprofile.net/proofs/artist/256ded39-21c5-40b8-9049-d7e070fe8885.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 0xe62385ef002408f2d02e467d05aed37810aafcac036ab641bf4b6352d3a6c31c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZ5FN2519713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbcfb0cd62086ae67e50cfb8b100f01d64c928787a4abde51a3f79d4118169c. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZ5FN2519714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb399cb1088e29dbcab088b0b9fba86746b7a7927664a8b28d8a6fadfe7836ec4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZ5FN2519715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c764e1947b852e346ccc356d9e6339ce41f88c83fb9692b3f298cc0f446409c. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZ5FN2525081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8045edfb7f8aca1843208938946dfc3188988dd44d10f4aacc34b85a7dc4cc99. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ5FN2525093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd340a78b6469c84fe2aab815ae9ca257951a1490b58d4659a255886d385dabdf. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZ5FN2525094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf6a22fe868b844e029a2f66f547d252424dea8f5522185608f8409e624ab5e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZWV32585108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcbba8bec1dde129c545dcaa5de8256cd9002eeb15e056d1d259a5b95ebad89. 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/QZWV32585111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86a049df52385795eecafd6f71346ea9f4bc90eeeb7fea13bba70b9ba06c53f. 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/QZWV32585112.
Tears Beneath the Stars (with water sounds)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed19092172ddd5a209014d68453fe8d2c033c028be1de4151083fe841db64f61. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZZ8A2523978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e089003d2ddd716f495bcee9f7d7d1bf6e17fc599a675122ef742f5d558de3d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ8A2523979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4cc9366855468c99e0d70a4c0ee9e19372bd9ac10d9140d4bfa690759ed180. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZZ8A2523980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933be375c6ce0b90e6537cd551655d21e8ddff51b100f34e81068cadac015eba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ8A2523981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e16cfe561f908ad44b5dd1e5887e8874c795591a247ab5c5bc854f4394ccf8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZZ8A2523982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f3606458d1b5b4ac0fae2e6b011a4a942612760e564f186c1ea5be34d0b1b5. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZZ8A2545256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9ede36f9d8311053a7c6266f1916797cb8556838ae642713f7b85600f69767. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ8A2545257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbbc15bb54f4efcaacd04b517b172935bb4a1d96fe94504e05a6aefd28ddde6. 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/QZZ8A2545258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85644537754c43405ddaa0bb1e3d191d0a711479e945b31e1d819f4ba9d70482. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZZ8A2545259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd2c39630289f8d89740986979da54a9dd4ec11cfaf6867f1d704bdca7f0ad5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ8A2545260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6419b0701a67e22ca26729c59c3ddca8eb6ddcb57bdf44cb09ca9a28581fd6b5. 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/QZZ8A2553639.