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 0xae37f5e4edcb8075c3c04091490350d1987f55288352496a39661a41cf307356. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bdd9151a-58d2-43f7-9466-f252b22a06cf.json and https://artists.proofprofile.net/proofs/artist/bdd9151a-58d2-43f7-9466-f252b22a06cf.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 0xd92b22d1eb76d4d30cbb21a8c7df2fb619119343810fc4df60031521fad681c0. 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/IEPSH1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b2724a71d44a6c1889547087e790a27777b89cfdb78cc7dc169f6a770d84a7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IEPSH1800002.
The Butterslip Hornpipe / Frank Cassidy’s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002383103547b18893256e4d6efdeb9a9c062c64b6217a51d8eee9e5589bb28e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/IEPSH1800003.
There’s a Man Here on Crutches / Tom Ahearn’s / The Holly Spoon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832a42350f66f34bc40b6fdf1d51017e93747879dd79c5336847eba93d5dd4aa. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/IEPSH1800004.
Paddy in London / Jackie Small’s / The Reaper
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc220fe9697d92f5c77c9451ac81f596cb0e2a9371ae8763d37a8c569f7cad194. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/IEPSH1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b3c90884ff85944fe12afac10b9265e046953d27cdf092aba562911cb77baf. 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/IEPSH1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62bcb4d942e9fce812021bd9ec28926e513dce9a02c559363f6d59bf2d01c11. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/IEPSH1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7afd43f74c056cbf043cda26a1daa5c9b0da9bc2be06f7248a8922a1a986f3f. 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/IEPSH1800008.
The Banks of Newfoundland / Lough Key / Henry’s #1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd756e01928944442bed1c81662d60bae9ffacac853832094edadebef5f81310. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/IEPSH1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff9d1e5c8c9a4110e65a0d9d242ed7427bc32637c440bc961a155282fefb974. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/IEPSH1800010.
The Knocknagree Reel / Healy’s House / Peadar Charlie’s Fix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbd19f9b4613afb3866c2eb11a96a9ab47a72c53cd8421f29fb3d4fbf8b034d. 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/IEPSH1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459f6f05943b8dedd7b6a46495271ace5891ccf4798ac2eab443d2544d1f8027. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/IEPSH1800012.
The Flower of the Flock / The Mason’s Apron
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba70a53938948b1fb7c4d8997bfdbceaf00e9b246617572ca6139b7de07d102. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IEPSH1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79257fb39861ed0a487bc79d57e4ee3573ea8a045c16fab838f4c9733b748e9. 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/IEPSH1800014.
The White Fairy / All About Weaving / The Prince’s Feather
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86f4690ae3baed965e2a1f954a1a91f4a503471800d81d7aac1aa3c32697fbe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IEPSH1800015.