1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x7c452b4a06b82982e01063a663fa2b6393ebf3776fca5549c5fc53c9ce2859a9. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/caba24bf-7085-4378-84cd-e7bdb6f10a33.json and https://artists.proofprofile.net/proofs/artist/caba24bf-7085-4378-84cd-e7bdb6f10a33.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 → block OTSBitcoinBlock must exist at that height 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 0x547819d0b542e9b469e19ec3eac87298e6046c4b40bae4c14aca2fdab132faca. 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/USA2P2130627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9d2d7b049572e5536ee5294ccb22a74232cb1b0fa8cbeb9635b1b6e8ebef8f. 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/USA2P2130633.
Epilog: It Takes Too Long To Make You Feel My Love
MARARÍA LA DE FEMÉS (Poema de Rafael Arozarena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6e4c0a8762a5a7807173e358f381d3bfb47d49ad04bb437f6c65a38cf0a50b. 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/ES5152300654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51ba6ceb40671609c495b33baed0e264d2b01d654104fdf671f0192b6089d2a. 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/ES6102328603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2e3eec06fe94d3ba1dbe030de90b15c7896beeec61fe7cf52c0546bf5b9eeb. 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/ES6102328604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc946334930a392b3595be002d8121280e211f725b2a77a7e3696f26e43896c71. 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/ES6102328605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eac84a43e1c0b018b36faa209646eb1013160eee7051da796ad4f8e1bd14c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES6102328601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e02d8b29b3e3941d113ba2ed890f8e5961abc96ebd43dc9e4bb3e2f35deea98. 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/ES6102328606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670f188e46e7aa81934cc727dc5d720116944b01790aef6f00839bf8f5863f69. 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/ES6102328608.