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 0x1879757cbb3b9cc0c0cdb29e82af4e65c95f2dd32ab0574524794c17695f8595. 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/a15a3a46-a6d9-4cc6-adf6-0d890aa4f5ac.json and https://artists.proofprofile.net/proofs/artist/a15a3a46-a6d9-4cc6-adf6-0d890aa4f5ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Best of Cristian Varela (From 1992 to 2009)
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 0x48f0cc79d704152f792d7e53094959d197e21cdcd853ae03fac69430e3c83c4b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:09:33Z), 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/ES68A0600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c69fa063701b97a718271bfe2eba739a20121024f5ec495be1575930a01f2ce. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ES68A0100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7517b0bd2fa2b768aecd39ee3f4e64f7bfe61d81dc44a841284a4ed19da3e685. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBEPM1000171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c1c455efa49098c75b2af977699844e33693cb782719bd94293ad51504f7aa. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEK602011601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17cfb2f25cc7de1597fa8d0d3777d6c03ab4335fd60455e8066d0395e1cfef0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEK602011603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3248179d33a6fe155f7cf750203f4454355cbc115b37d90e3ac438c6872a45f0. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/BEN582500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d62ad284ec55fcf662d23da920cacea52560adb47a09aa5b811bae5b13220dd. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:03:04Z), 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/DEH742510889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5bba0f129662144cf3d0101ee7639e39531d0c30c6ee882862590fddd78b8d. 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/FRX872541599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5167172c1d3b3eabfd9110f1cae643ee87a55475d884adb897872b3a75e6f11. 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/USA2P1170256.
Pure Intec 3 (Mixed by Carl Cox & Jon Rundell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6537c9f8f0f0675fd6e481d532c2adb71108d1c31e305234398863938e09b7ef. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM4TW1672691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d567066cf13de1d06929ef7b7d89ce10c7f426672e5c614ddf3aa4beb7aca3. 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/BEN581000216.
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 0x16d754ca9b60fe271b4cb0f588917b71a04c64d475e9e43550c82ffbb09c1807. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ES60A1000937.