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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a60b253d23d7dbf1343dc1554e87435e7113d28a8dfecdd765f979436ffe348. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86fc8d0e-e18b-4758-82c4-9061323c9d7f.json and https://artists.proofprofile.net/proofs/artist/86fc8d0e-e18b-4758-82c4-9061323c9d7f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d7ac0db3ab57ee0b83a8dd0e9775a02af4ee97b54540b462c1bee27844dc37. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZ4JJ1672977.
Cherry Blossoms Explode Across the Dying Horizon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6895e395cab2e726fb79f57f3554d7e889afb241d8bb31558b3009ec19d58770. 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/QZ4JJ1672978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f35cc7b946210c2f56d883f41bf0bcdbeb303f54048fb5536f574b0ef49f1d. 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/QZ4JJ1672925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37f91b5fc01a842e231ab3bb6ae769ebf8f402085175e72a4020e802496b0ee. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZ8LD1968568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e15ff7a91f3f86e62ae7bb51ad5ae0c1e5176f8568eb4b2dbd66c483c4282e7. 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/QZDA71840434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47e69fb1c013f9a0be895a4e41ecc5dd433cf00641ff6c69c44b57a118b208a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYZ1902332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f396ba8862e522a0f2bc632f70383c768d237d3976c789dda82a1b4f6c3e75f. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZDA71806059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb152feb5201c0df3760a1e1c9a2c61deafb052e92599b497ad9eee549e21e90. 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/QZFYZ1902335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf31abf77759d4fe4caffa2b5f2ce57b6bd25392afb56ad9133d05ac112f86fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM2PV1842526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6619e90405f3a103bb1f5aa441e7c80d293ca55bd0d2f9119ac0500786136cee. 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/QZDA81829640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bfd9c6d2f47e398794ece592d6e8fcdceb96aa3102e87a127c49755219b144. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYZ1902337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02439695249261b184201b1dc0ef389cafff2bc58b7e4b13a5b87d81e9b7de5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:40Z), 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/QZFYZ1902336.
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 0x099d5f59db2425d7e4ebf15b775b04b5bd69ef1d2b8fcda533157a4731930966. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZFYZ1902333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c97410ca4f7f17e4d5eb7b3a0ea2e2f07c9f3070b389b80087ba0a1c0f20a7. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZFYZ1902334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464f6261d9624840b715e3232ecdc392a90e4b0d6871226c78a662c518283236. 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/QZF8N1998717.
Whiplash (feat. josh pan) - sakuraburst Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8ae35ee718705e1db697347a161ce96a1d8319a3d0b65ad97cf90c75589c2d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USLZJ1684685.