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 0x5e3989c7bd7e595bbe35496a3a04dba53915fde375cab5a89dfa120b1f4dfed4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8eb14842-69ba-44a0-8c43-65569c304b75.json and https://artists.proofprofile.net/proofs/artist/8eb14842-69ba-44a0-8c43-65569c304b75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Don Tristán "o Namorado" fez esta cantiga
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 0x986936580708a05aad83552623d707962f96dfd7744c095454a58e819bf8bd4d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed40fecacc9a57d377ee882e91e604d6c1548356285bb411cbe023bf97b2c46. 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/ES29G2105102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27800b913a95972161beabfc158fb525ea7179c132a09a85a02bd5adb0ddb7b5. 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/ES29G2105103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d46c141a7260264e28ff59a5d8ca5859c1769b26395ecfbf10af3ecc4276e1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad17a342c0cdadee0db8c5bdf8aa8d5bb9947892504a35ab43e00d95dc318ca. 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/ES29G2105105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906ad81b8b80ce813cf751f6965b0192e417d30a170d5aa8020f51b53f4dc007. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41571fbf3dcb1d2eb07e123caafa4190e6907c60453b35c4b5e97d7bede848d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3fdbf9feda6878b9044cc37f67a7996edd5e4e51eb8c47bf7ecfb5402a7945. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb816f0cd4f3cd32bdfbd4da29a3ed1679f07104f8aa482391b9f94db63fe31. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018739813b4e9fd180b6a65715734f4022d6139bc606d33e1515fbd528f213f4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7412263c53fdab9441600f59a5f424fdc35b186b0443cb533adf0c5b8c819aea. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ef2c7cea92064cbc950acc97de8110bb931f074fc911999cd558c574af0141. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd106e5e91ce07e73aee5c091db24a7f5dd2234efb96e5f3ccf8be73f3c29767a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb583f5b87264cb4a346a73f9853e06c672777aa9d329a95abd748254ff1872ad. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490d658dd303ce85297a6473fa9111961cea7841c8e6b6c78f2a048465728124. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES29G2105115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83225433833c4fc37d7d8be39410357c9f4886eb2d0601264c6d54a84210bd5. 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/ES29G2105116.