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 0xaa1c1d37bed909b695927a712bd2d3dffaf3babbb9171b06d60772816296f9ca. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4ace57c-f31b-41e7-8080-30f3e72fe671.json and https://artists.proofprofile.net/proofs/artist/a4ace57c-f31b-41e7-8080-30f3e72fe671.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 0xf972308089b37a940c8f6bc9401a2dd312e3e365a2aa7fac4389b3a3bcfcdc07. 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/GBKQU1853138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da7e118fdd37a6f9769ae860ab79b721abefad9862bf53b1a34aa5b1f6c7055. 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/GB8KE2052591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87b2780b8622eb421cb2af8c9c0410167ca3d9a251fdb491de4fbb9e69e0a45. 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/GB8KE2052595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3d76e9a3698cd742d345d946ee42dbf20f27525b922461ad1b9d0dad09680c. 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/GB8KE2052599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e0a25a55ce0a4f9695f31413f3d2321a217d527d0e9da109ab3cb12a9477d8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:26:59Z), 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/GB8KE2052602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3be097bd20f4ffd125a6f419a83f0816d06548764a8c8b0e3fe6797a0221f1. 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/GB8KE2052604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7349276f96365c32774ce52720e26020f8617782d2bc6d25c90fa3d1c9c25c09. 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/GB8KE2052606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81533ccf02adecaee2d167a258559650da5a24a9b259016b6fa132d6eae2f47. 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/GBLV61819725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac837f20ad903026fc6602c0bb3cefea489529240c85b6281fdc9ec5dc147875. 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/GBKQU2197518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e7eeab7148b79d92400d374d80366ceeda9aea7e15db530ecd1b1edc249cf2. 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/GBKQU2372548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee873f013a22e67a59288ae9b60af48d1720e08cafeeb8554e90decc259d910. 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/GBKQU2372549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8094531d09002ba755fefd56ca6a25b386778785c8ec50e874919c09e4b5484. 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/GBKQU2372550.
Nothing But... Bass, Breaks & Beats, Vol. 03
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62db6d67564efc904dec174df9a6d5a31edcd03da32ac6f3d50e519ec1d149bb. 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/GBKQU1986339.
Nothing But... Bass, Breaks & Beats, Vol. 05
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f9e44f2a8e8a60450ec782e9d17e08241754738c9c1e6b5d5a6247eb37aec2. 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/GB8KE2422444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6646a68e3b2b7d140270d2156a6f0233a0c361c19136ba170b346c66ab5591e. 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/GB8KE2422298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e11bca6f1dc67197ea5dd3a129c825bc946bf88b2d2978d65f5aaf3c09e2be. 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/GB8KE2422436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ddca17d89d7cb98b802abc5f682f8e3aa30a9b3f4179064434f3083d83dd4f. 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/GB8KE2422437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f7d842e8def211d66e81c5af5b29a71d7de037329d23a04ffaf2bcc2bee346. 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/GB8KE2422439.