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 0xd638d4e289796275e12a7ebe2748df58c70a0f8d26c2170e1a51d7ef0f824bc0. 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/0d34d53f-b514-4a18-9a6b-70f15faa02a9.json and https://artists.proofprofile.net/proofs/artist/0d34d53f-b514-4a18-9a6b-70f15faa02a9.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 0x29ae41888a9a398f1eb83e28e75819ae6a39fc540a6c8b5a73ad64e63be8d8ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TR6550800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313782bd0214db69b8c377382c4e7fd3897fe0da62c405ed8c8b3ca2b901e0e3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TR6550800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d66495e9d46f1adbe98927f61341a786901a6ca65708351f5be2dd4afd89fd4. 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/TR6550800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a4c8b0f9f4e19537ee8a490aaf2e6ec6ba70d165c106d60142ad613b39b166. 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/TR6550800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde88ecb7175828bf9bf0a76932452eca108782b7da6cc60be55f42ab7ac5342d. 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/TR6550800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2e63c6a66dd77522c39d2489918f27d99ad71b1395ba4293163d1810567444. 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/TR6550800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e92dfe17d113dbd6fd8373b7c8b867176e5e77c70a51f5d008f56a97f8150b. 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/TR6550800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9727928228ad152da356ecddead1e02725b5644b67074c457c20598e013686f8. 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/TR6550800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520372f809d568034e7a87685360a2cfdc1d8b20658e3736529d6c4957b09b5a. 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/TR6550800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b33948f588245a6cdd978d16c8651926f1c262b6e82ceecf89175ba28664c6. 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/TR6550800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfea7d33fd91478bc96f9988aa6088f1171e1522be534bc3d917dd0b79a6cfc0. 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/TR0531913062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57a8c57c14f32a1cc74ab51be15a58f53c000794027e178b8c609b225b4b276. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TR3921400099.
Bora Öztoprak 30. Yıl Özel, Vol. 3 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964f1d4591cb794c306dbba4dcc93d2ecc77b2b7ad5a55e91c30997415aaee03. 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/QM4TX2438429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8b4813953c186ca1598fb8685d8983eacbf0d008061e4ddf6902469b9b5495. 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/QM4TX2438495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d6dfe6f766aa2b66ab3e5d9542687e91f248deb2a18bb87a12a4f2cc40961c. 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/QM4TX2438321.