Heart of Gold may refer to: Film and television A Heart of Gold, a 1915 American silent romantic drama short film Heart of Gold (1923 film), a Spanish silent film directed by Manuel Noriega Heart
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 0x2d7ad23feafa28cda783805a259fcf309763b4129a9d104155bf5f7a8baa2a2d. 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/89681412-f630-437f-a1a7-b4ca5f4a21c0.json and https://artists.proofprofile.net/proofs/artist/89681412-f630-437f-a1a7-b4ca5f4a21c0.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 0xd2ea36f927c8a13edb91142cfe1732300cf1cbd48d5b5fee9ae4625526f8d517. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US3X51535502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4b250d780c1c67321a0432863b6780211976517bb8be2bec128f09269e1d5d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:49:58Z), 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/TCAED1938322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a349087b4a76c8c07640b1ef3ebda0def6f57b046ae0e4c01ae68a95a80c7b. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/DED832100502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb02487023489be67db265ca9a6ba9f4b13eddcdbd39295ac37474ffdcb7335. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/DED832100506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b317d658fd463ca21492b3b5b881f1b80420a92543a1cdade3e0a10a6ee6069. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZNJX2413742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496c9ede971545582852972c967a4df1dcab2f3055a32efc6597145bc0897710. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJZ2460618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61995783f1fae6765391895ff8485d869ef4bd45f10cf3c4776ddbf828e148d1. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZMZ92484970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b317d658fd463ca21492b3b5b881f1b80420a92543a1cdade3e0a10a6ee6069. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZNJX2413742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bdd14411f0e5b693450d435bb7b6205a11911bff6d2b56a16349b5989cd511. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNJX2467317.