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 0x474cf8efa385b6000f400da99f65a2eeb202ee7f8babd7c928b5aa407ae457e4. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b645ef9-7fc6-463e-ba5c-5a7903ac23c2.json and https://artists.proofprofile.net/proofs/artist/1b645ef9-7fc6-463e-ba5c-5a7903ac23c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Timeless Soul: Sly Stone and The Mojo Men
Dance Your Pants Off - [The Dave Cash Collection]
The Very Best of Sly Stone and the Mojo Men
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 0x9f37a7265b78f7f226a702dc56013cd8d4831e642e45c1ad8c7e041039716bdf. 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/USRVF1401642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7e8079f6a2be61558f93f0e5603bb528f85d58e5bc790dfdf082136970c972. 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/USRVF1401633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949ba42276062d7ed6ccb31e81e3242349114e9584233aaacaca6b9afe6263d6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USRVF1401634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c75a36f2456de53922f75c4cd39c0a906e6c7e66d8ea3aacea13bc6e4cf4d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USRVF1401643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf171a065f2d15e7594d19df65c9fc89cc0d207b9f9a3b86ad6260203968bbe1c. 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/USRVF1401644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57809b2e2d018f4fa11740e11262a2191fc4cc4a6a9a26237947433defc3375. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USRVF1401638.
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 0xbb9cdbd089fc20e4ace7e19c3bb92c1590c115c95de08acf1a1390d09a6c728b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USA560858717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eb6b0fa2f72c00a706423281a507da0dd2e9d9288bfc707f8eab458ef1c3e1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USRVF1401641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933f1f634250aa55937a1ad55453635a0280cb1bdee1bb85f28b19152f8f2758. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USRVF1401635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7e85911839d65bc294662f23fd347ecc4ec3cf2be7fc50a067b5464d34d6a5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USRVF1401636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ce3214597b72789a42cddb13b5bcb124e1f15ba36e21eb0902b0dd27558d2d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USRVF1401637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391719ca923e3abf5adb958ccb2ee8b35841ae51ed5eebe101eee1fcc2676943. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USRVF1401640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf80a8d118582b34e471ec67ea3734c678477e81ec9ce03456737634aec58f6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USRVF1401632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabe6ce12e01e1f9cd675ca0f27cc162be6d14c5e3d0fb23f51ef096e379f6ba. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USRVF1401639.