"Billy Boy" is a traditional folk song and nursery rhyme found in the United States, in which "Billy Boy" is asked various questions, and the answers all center on his quest to marry a girl who is sai
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 0x7924ff4bfc2e126880972fd34a25b6ffc7f08074b608892d8376620ef379c3ff. 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/28a04b6c-8848-4a52-9e44-2ad628dc7d53.json and https://artists.proofprofile.net/proofs/artist/28a04b6c-8848-4a52-9e44-2ad628dc7d53.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 0xfe61ebb709bbc2c338fa4204675ad270301b291e42d911f66d4b5750115ef23d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM4TX2396671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69ac7315b750517f1fa36b205d8c1c8050f7b1210d6c28f493f55f0943b9d5d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMDA62258420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6865913c067e196c3588d26147e30abce9533af9e31fdb7f4cce34d18db7cd. 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/QMBZ92290309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf628b832b610326571fa4ecf305fb9eda8040795b47ade86fa916310fd8af8. 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/ESA012256460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fb6a84c29004779b3ffceacae97f1bab8f997d73ab6e8b39de466d6f8577ad. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMFMG2377594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ecae38ce2ce792089f19405e4fa7fa47e8f01c58ee723a19fa5273b46cedc9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES03A2300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d45420c83be0ccc8a73b443cdb83353cb9fec709e7365ff638ea11f598b676b. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QM4TX2338588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeae8227b81fa045724d1bf6b658f6a46bec01d6f48789ca095bf256c9c4d64b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM6N22247239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb1cb696bdd6c6af52eff04747a47d6d2ad798255847c3157d762365111d6de. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QM6N22241724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c19d8cd380562d2a9ec4ed98ee1607c6e2ce534601e4cb21d7bd2dc8be5cd2b. 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/QM6MZ2221084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f97961824f6ead24b416e9463a706f8cb3a2429d8dfbbe56549bc7a8fc2747. 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/QM4TX2266248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e04a5cae51b3571b1bb6531c4a007c9aea1e95bd79413b70cde78353ae3e598. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZES82200770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9232b7150488b6fa2860d54de9116353fe455d7f77ef19418c423a4ce0811f7f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES62252026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc27d2ce975ceec14ceb6dbaf0b4ff1e52289844f97fb0eb3cb3638f884e45b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZES52202567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148473059be13cc6298b8f5915b05b6006b56da60116efafcdb8b28023e9798b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFZ42279879.