thumb|Origami cranes thumb|The folding of an Origami crane thumb|200px|A group of Japanese schoolchildren dedicate their contribution of senbazuru at the Sadako Sasaki memorial in Hiroshima. is the
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 0xa947d889649ea5e10b7d449ca77723c3c7f54349895a83ef46210845abc2d86e. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67261ba3-6a95-41c2-8533-591a1f0e459a.json and https://artists.proofprofile.net/proofs/artist/67261ba3-6a95-41c2-8533-591a1f0e459a.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 0x9d510d604fce97ade76363076f0ffa9ef9a8c6837080591662ff7f3ff21dde8d. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCJPN2162111.
Purple Darkness (feat. HAKU FiFTY & Yvng Patra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5091abd56f9508131602213dbf08450692d706177a16c0acede579d23c2ad2. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:09:10Z), 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/TCJPO2154295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ac4030f53ed34554ef5bfcf6e51bdbf3fe6a88267b0c5234f28392d8f0b1d2. 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/TCJPO2154296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2529584126aec60b8197c9c2160a245283abcc972b70d159139bf25a9d3bf1b8. 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/TCJPO2154297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b69c3c1273c22f7e8c0ebbe50cd65030d77f7fc39ee59abc6f18246c8bfb96. 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/TCJPO2154298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd646ea968fdb5d4407ba14ac6e8a614bfcfbae8a11dde21c46ecc0aed797035. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/TCJPO2154299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d753898a6c6ddb19545faaf1c5b475f8adac29e87ab1064b9a7f591736cb6d3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:31:24Z), 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/TCJPO2154300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe48400f4aa3d9761c8cf95d57c9cfe3af331d90a778d610cd231dd2ea5ed68. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:19:15Z), 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/TCJPP2183237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd4c80f62dbc68b8112ec25497253f0aeee55fd269aba9ee185e8241d10ec95. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:58:42Z), 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/TCJPJ2500319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d268508ca25a76c88ece658dee1df0e74323fbbf64d1f07db4a7a62ffb91afd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPL2520846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05bf3cdcb18b9cbd7059c179d64b32de10917adb5049c22fb644aaf0114057f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCJPV2357345.