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 0x0fa6882ced44e2fae0118ef302f619c52c40ca049e7168d0d394ea5aeded7f4e. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af520fea-263b-43d3-84f3-740159a1e6ab.json and https://artists.proofprofile.net/proofs/artist/af520fea-263b-43d3-84f3-740159a1e6ab.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 0xee680e0f4ee5fcefc5c66011a6c1459e3728602fabfdbc15ecb4188f35af6412. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4DW1573273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d56e3c2aef599ccc3c851dfba1dde7d7ad7de655bb083b8786c300161d978a7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM4DW1573274.
The Idle Road and Old Hag You Have Killed Me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa895b3625a9612b8b20a0826a6bd8e9d2ac6904abb1b684ad700054322424527. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4DW1573275.
The Honeymoon, The Yellow Tinker, and Johnny Cronin’s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21acc15db660876b1a9deac62f712c20c0741149b0bc7846733008e7df493be0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM4DW1573276.
The Humors of Rahey and Tumble the Tinker
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182235671c43102e4cb74fb094c03e3206320afb69a14f29cc642c1f71ae4698. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4DW1573277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9c6a6229be61fe0cb63148911e9d472bd97773150d0570098f76f5e9bdd09e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4DW1573278.
Rolling in the Barrel, Paddy Kelly’s, and Rolling On the Ryegrass
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c3fe4ffc9b4c785575b1613f282468bdaa493745287a1ff7496dc7daf6333b. 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/QM4DW1573279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b0d7727f67e75d84984c6c3c6d5594ea7facc6296d7d55d8ff474f48521907. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QM4DW1573280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1b54168df1ec70bc9865f27cfa2668fe7949274c10a6376922ca903e069607. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4DW1573281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe267262a6148f95376eae9beac588e470becc3b209b84e36d2c26e2bfbe12bcc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4DW1573282.
The Keys to the Convent and the Mooncoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffbfa807dd8be0bddc04b8aed1d565c930a42010f2c9cb34779268b7bc68d1c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4DW1573283.
Miss Thornton’s, The Bag of Spuds, and The Limestone Rock
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ad1d5f02b6d21ad344d403cd3160234d1ca49666f388920846ee0288e2e18c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM4DW1573284.
The Musical Priest and the Fairhaired Boy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8d443c4a5b80bb33b30eac18c6361a3b0c28bd1f9f2956b6005b65424e7b2a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM4DW1573285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c04fd77e541191e95a4b907c7db2866228ea29e0af476f61698edfa22da891. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QM4DW1573286.