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 0x0c94e30162572bfb24f2c6a4e34f59ee5dedf310d8674535d9adadae51b9fc66. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5c8b92e-ff9a-4604-b5fc-b28e42962665.json and https://artists.proofprofile.net/proofs/artist/d5c8b92e-ff9a-4604-b5fc-b28e42962665.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The HAMthology: Lin-Manuel Miranda's Playlist
Hamilton (Original Broadway Cast Recording)
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 0x1adfa761f68ad37b0345405031ddc5a302ce18f23beec77de0082dd83e72f287. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf169be04044c73991bb9444ec0b3151350f9d2cafd1dfa7749c6417e45ec6333. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120f9c2cce2607ebd3a22254b588656594ee9ad4d4488cde47aa234a38e6fe4f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899ef5d13d825904de7faacb0cf48fb4047a003e1345f26cff2db842a6ab6353. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e076554cae56b95184fb618af32da40b8ac7a9c82d0e9b0c0e484d422e41006. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78aba3b75c6e57afe439f06c32ea3a3752f971e1a947b383e0559f84946ee04. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa6f6ebe1c74b2b8f22889fc52ae085ba6db543b680ece31602ac5ff43a21c8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45af911bbe512a110572eb23ba38e64e91a9bcd786f6e80cd30176f21f306c85. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030a19f73671ebbe236e6ee2c04a80e18b3f49349df51e2589413a5d916b586d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb2fb432b07c293e12fbba412ad33c5b5e42df41f59e58e1ec939b9a6165172. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe66f8b7eaa20e9fc333632f13efe248a30590812ccb5b54a79854619ba5b9c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1480345ab7af734b2cb91aadab8c6a5ff98b54a0643825aaaaea80c30a4504. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673729b6a0b173a8f162f9d6b0dc1cc05771aba2612cf749651ced20549bff4a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd706ff43445a46dde1770ece00427033a0ce9aae53af87f3878b0cef05a25116. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e752ca570f20a9581b11e5b1901efd6ad6b5c3408335db8ce03a96dbea972c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa422b290e16b3d5d3da122a01fd4de41bdfb5752e8b46afcc38a216849e6fe35. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3009e2bf5bc419abcb7c6d98dfa90a1b240d534bb6bb18c7d49ab65c8aa42b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52272b7288b8e5ec92686450a9349237f13025fe7ab612291da80a049d4d278. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1535b3171f407cd6573b71eb4dbb4d3c97073f947f24932e9318f6ec6b389c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488a87865733bbea9679358cb1706a3a440a4af31478b224d9d5d3146b269820. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21502622.