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 0x9acb24e108d7bdfac5bf40101ef1324f1073106bddf8ee096602d9bc1ad1927f. 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/6f429943-3845-4a3f-8aff-fb08557e15ca.json and https://artists.proofprofile.net/proofs/artist/6f429943-3845-4a3f-8aff-fb08557e15ca.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 0x511aeaf48bc923fb57898066969aa19dcde348153c1ea779bf0f4e3e51b98e90. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IL4721000840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf214c131ccc258d97af1572cb1f4b742c523ee7ac1a26dc189b30b3845dba755. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL4721000841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd029fc32aba442757a0dda30a06dd92c0c0f2ea4d8cb150e8185c76097eee377. 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/IL4721000842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d94ba4438843a5ea107134321779f7afa76f2bfb0a81fd84787a4ae250f7bf. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/IL1011124297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3316a99b4df1ba112cc397b963b9e39d0c9e5d53e390e55b2086b0d0ca0f0e2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/IL1011124514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44804e4c62feeb1c2eac99cf5a67478c50c96ee10090526e4467da286b8491a7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL1011124299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e4a37e98744646221c384717c9b4050f3ecbf5f8c0846f0f5f7773baf67408. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/IL1012101141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fdfed3e59e32ab757b4b60f7af709e2afbba5bc37c7591bac8049712e7dbc9. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/IL1012400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0e00db8dd86a26cbb472d206dd5b1afea71f8428da5b9c59c183c6e92e18fc. 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/IL1012401027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b04e6e948479cac9d3d17cc4b65be2afff25eb588505d1b75feae8f36bdfddc. 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/IL1012402007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e1eaf0f636e581577c9a87c8d7581636ca80275df49cd6653a130715382514. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/IL1012402117.
סדנה להעצמה עצמית [Shai Erez, FOOX (ofc), I&I Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0759acc1a251e855f012fd8cee566ac73d995693f15ffc6a3f4c56fef88ca30. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/IL1012502243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a58365748f5776e17fdf28e51f08fee157635df734e200ca51442da14a89ac. 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/IL5821500891.