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 0xb026feea3f06a9cb91e2233ab7ca1c099b28ce3edf92a7b922f419f0f06aa55c. 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/0162cf2e-9849-41ab-b1d3-4c5c8dc6c4dc.json and https://artists.proofprofile.net/proofs/artist/0162cf2e-9849-41ab-b1d3-4c5c8dc6c4dc.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 0x4fad703826f38b48e9e0da4d6438e761c9090f59eeae4d60b3b19ffbf9161bd8. 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/TR7791100183.
Ottomans Classical Music / Osmanlı'dan Günümüze Yaşayan Gelenek
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6171d5b92fd9418e0a5ab52add3e7c8eb501d37cb4517a87a5ccd7f69a5f6e3. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TR5981300194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e53b2c620782c4ae4df84306a922d22a167c7ec0d5b235cf26d28fc4b832c8. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TR5981300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe734bf14dd523c000b14b633d34a8cf4dd1a0c77953d76e04b85f16b851cde75. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TR5981300198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e0f488592faebe310a0e9270002169fede030080f755722f51dc0a431c00e7. 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/TR5981300201.
Buselik Makamında Saz Semaisi / Eski Mahalle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66a0047ddc7c058b0e54c7e8b7135e1b0abeb6f5272b5d6e061b055a5df377e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TR5981300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a511394fa2db84534b1093f164b860bb8c5b023bdc8fc9383191f359d83b40. 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/TR5981300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80367d0cfedceeb35c29387b60840d2c1d5096431da1a27cc515489cd585a72f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TR5981300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec6298688a21143feb3ec5446b240580fd6c4cde8130f3f88a0ecee9148cbce. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TR5981300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c83218d8476cb6b9de6fc8b083483c6184c317caadb20e8163df3e8e816bbe0. 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/TR5981300206.