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 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 0xfc31452631efe16b258a9f3b56927a76e060b734e69cc25df3b831f18a763839. 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/05912e5b-cae6-4549-8847-0e51f4a5c3b6.json and https://artists.proofprofile.net/proofs/artist/05912e5b-cae6-4549-8847-0e51f4a5c3b6.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 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 0xccb0896c4cfcb483ab04b3fb4d1fc96d86bff407dda90ccb3514c9979342c128. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLFP2020050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264c851436ab4a8326a3ba22bb2946f9e45b4b0fe8baa9a6d3d1f30be5e83b85. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBMA22071672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f23ced87ce2a8d86f655d4530bc1ea26b1b47d63b4f15f14e63a7eef80061a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ22B3005326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0c3c1ae8f490f2b29bfd166ee5a0cb7a054f28aa59531361fa5aa2318d13a8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZN882118713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc4fceee7a9fc580d006c43b0e31175e4de98fc22d5f271f32ee99a97bccc5b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZN882155478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb1b46f07e1633478eaa841d2c9c0fea5980041e70749c4fac1cf4dbd79b7a1. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZN882205306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2b68dba76706b97d4ac37a053df10302a47d9e0c2422ee8db2eae0f5e8d55b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZN882289888.
Mi Bella Dama - Emiliana (Spanish Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4684a202f8cccfd15a2d252874feaa4c3aef2a2b3fd76e6666fbd393b3c7e992. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ662342814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c26be510067e6a1113f64ce22eda8f5101da2a06ab8fc09301cc9e8c637e3a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:54:06Z), 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/QZYFZ2408437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a076a4427bb2b105a3465e141acd3114146955cb9bc8a7b724026f1a9ecc59c. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/QZYFZ2456967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec538202ac3c56bac16b60d4fbba0392b2d9bfad45eedf0ca52a4060453b417. 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/QZWDW2419342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddfbe5325f372eb6c850c7f3ce45617ddf1a9903e0c715499c6f0e12f80f0ad. 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/CAHQJ2506632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164d3f5ac2a941702adabb8165b2d1ac61316fec8668c2d5b721a8205a3fa291. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CACWV2564213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fddd589ac4b39dcdedfd8661b261eb29798abbf378d7cbdebded56e454904a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/CACWV2564216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee7adfa60ae6553a98c0373c44aee855652bbfc7a016074d71d63d33514d50e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CBEYJ2549592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f5e5a0bd396db044f1648d4de5120da91cf1302e9ec97045ef20b6b2af0f29. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/COC012135256.