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 0x4063517004a670b5342f2bf7109824c4ce238f40bc7527d98e5bdbe7378b988c. 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/7e0b28f1-1287-47d6-bd54-00393842c414.json and https://artists.proofprofile.net/proofs/artist/7e0b28f1-1287-47d6-bd54-00393842c414.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 0xe5b26b25e6c0cc66fa65eee76fb020937445c53c0f0bd27429ce9e9f518075d8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CZA162154500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11de8ff3d5bf8abe588355a1d022844581d11267e1f47b41aa67d39cd6b83d6. 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/CZA162154501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05b9f8207602e8cc25f8f8777cc97ecb460beb5ddab0a6ac5ebca4f0193c4c3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CZA162154514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2dbb77709b04bcba37d5e9d52d24fd2d8219e2f8c944cd6c164692c5d89fb4. 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/CZA162155091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6ca14e7fe2019d8907c6217ff8debe42f15d2c0b97b0052cb8681e21972732. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:17:16Z), 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/CZA162155092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43194b5d2ed5e27508b9ac4097c5e3a73d9072ae982895d7cf5bc6244d850c0d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:59:36Z), 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/CZA162155101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481c3955226d14488a17a7eae042645d42974226c7901b27b79dda8109d91081. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CZA162154447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7448cddcd5751b7819c79f611da7d58ee856b74ff889791f59725504966af9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CZA162154449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5ad8e4cf053e3bdfd2295a4f64f4cbb2e86e336fd364d0ee9438a320c05576. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CZA162154451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940933459d556257ad0427882abcd0b9def94b4c0c6a2087f5fca75079cf634f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CZA162154453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054671ff166f00a492106b5383db4a88b97fea0b08fbbf77f21fd8680060574a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/CZA162154457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344a9920ab3bb6f654f1f0e82d5c6e0c10a30ddd06e2baaaf670ad4ecc3f12a1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:45:24Z), 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/CZA162154479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbb581020838472a28dd2749a906cf479e50f7c7bfe998119cec272035a391c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:59:23Z), 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/CZA162154487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685517faf145cba586a2e1351edb47a6ab66fa17db551af429b7e1b7868f1995. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CZA162154488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68501da294206a724236dacb77d222a75546426181c36cb7e264e7090f730b78. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/CZA162454858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df6d065c54cbd7abfbe106f1479630b13b537a9922d928c7898ab688a02ad7e. 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/CZA162550212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c7437935d20ed280c498d7d104f3b46f7b82ec8d35474cffd7fd37575b50a4. 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/CZA162550213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb220c4d2c1a7fc8e1c36abd944dc663dd33fac02fc853de6ba8f34d6a0f144. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/CZA162550214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ae9fdf8f9ac1b16d2832df2703b4defeedd2c92d9fa241e2f10d4443b26201. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CZA162550215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339c2f679d2334f3bb90aefaf46395672735ca84f3d1cde8b51524d6f8f99d2b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CZA162550216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf38924d09a70f5c9af59cc7087f5e559472f54479e11eb7e6176143d43a8b10. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CZA162550217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd9ca70800f9107415992cd1f2d477030f3e77d9aea90eb7a100b832e3dd89d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZA162550218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9547b4d98f23410312d59872946a47a1a06b808639cd9c876c6b68f85cd69b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:59:54Z), 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/CZA162550219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5298052237f0b3979d46513a17d5e106f97643b95ce43474a59ae9f56354742. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CZA162550220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4df20952d21865b3159c54f89cd1d08d4d3fbbe8fd222b8140e06b941eb5d1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:09:59Z), 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/CZA162550221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c9918b95762b463087d72dcdc05dfd5c65a3f7f6933a734c0166db8c94ded2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:19Z), 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/CZA162550222.