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 0x1e59a88a99c1abf65a9f70ab3a9bb4241b99e905d076334c2387087548a2a3bd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba44fa18-b3b4-47b2-93b7-493dea4a922a.json and https://artists.proofprofile.net/proofs/artist/ba44fa18-b3b4-47b2-93b7-493dea4a922a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Voices Only 2012 College A Cappella, Volume One
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 0x7836d38f48c1da612bebc973e4fdf856850119fa06fcabfc247ff1c3936c8935. 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/TCABI1211368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9739aac36da3e44fd4466d2c93c7b683fe68e0d91a6ed6236c34c58ce9c04f30. 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/TCABI1211372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ce868a908fdc99914133e268cb14f7f1d30c21945e80df568e85bba76c2b24. 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/TCABI1211375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4549ce813e624726bf27b7f8cc1928841273918d9dd92c6a3d97f48dc6765d86. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TCABI1211412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a69c9473ac965c0c8a6d32bd1d95b7574f858e93731e19c1db6d45b22863ec. 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/TCABI1211457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9983b72dad8fe32a3c60d5d952e1c4e9cbd6a32fff7a83dd7e8d861b4655f56d. 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/TCABI1211421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e34130ab515a51beea1f6790ba7c9c966bbe2918f2c4c931629b45271c2e7f. 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/TCABI1211427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97e8647c3f1e44810d684a3c033afc46852f379a7b2567b1e000af50653ca6b. 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/TCABI1211440.
Voices Only 2017, Vol. 2 (College & High School a Cappella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6649f6e94c3112e84f26932aeabd73e3e994755c5ea92bb1bafe28b0d389cb. 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/TCADN1824030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010883d10ddd9b7c78183978f53cd10842934875a4a5cd22944f506088f6cff0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACU1606681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170132bdf23c084f02825e2c861a0059aff0208e2d992d781630bbc60d733f06. 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/TCACU1606683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc632fa4db66ae55032bb985d14f698d0de215a101a321cc38bfe03c87c496c. 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/TCACU1606686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c7b123791a840fb47de9687d6ca077feb5c649eea6213811e1cdd9c5a0bf94. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCABC1107125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97927cd5f09bc809a30267c30be210b19e926f108bf989e74386746ffe34990d. 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/TCABC1107127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1402c3278f7fcfe975a53ddd6cf9c6344fccf327603edbaf6a85bd1c8d296267. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCABC1107128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7bee4af9c0c7e20f0c5aebdfe5b0100ecdde3018e06f8b77160e63a8611f69. 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/TCABC1107135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad8e991c58a610234e55ecfdb49622b6a5d1d5af15204e6744acbab7901e4e7. 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/TCABC1107136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a316f9c44bc7fcb0b076c351e4b10e6d3f71bc9a28d795db9485b3ccc18c2a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TCABC1107132.
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 0x9532c0ba4acb3d1fc716420a8262bafb1f78160f384e8a28933ca42e873f9aa2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCABC1107133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e93df8a028f412fbeeae5e86accfae78a6a2812a1f7ed50804070c847b9578. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCABC1107138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330406ab44258e361efeb1893e8c0efdbb7b55dc041cef6082f63f038b7172ed. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TCABC1107139.
Boyband Mashup (Everybody/I Want You Back)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba0dc13a37c7db2437c8d731d8633f9a70759f8c97c3b46f7750319bde0ae93. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCABC1107141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32df77981c2494a70a9ce7dbebc05bfe0076f6c57de66cd2df2d18ddc49b9522. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCABC1107142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30e72c1714efee21a4a6b5b80415d4f00ec8d3c6e9f2a047ee70f50d2af613f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TCABC1107143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef074181afce53aa66b910a1c93fe05a14a3600938032c1627aa90513a5eea9. 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/TCAAW1103218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7da87edd49d12a51a9bc74497be9740450ce2443db35b871d743b5b980499d. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TCAAW1103213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdc22fd81ab6d990bac0dc5da4ad58a358c668d7217d47e83f44e24ef760f97. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCABS1322586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10145daa7cd65645ab161bfccd6fe78a6437dff0073f680a6ec723200fb9ce8. 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/TCABS1322587.