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 0xbf52df0bdb5259c29b294caeea73fc2e07a761346ddf311e474e70bd58fcf854. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49c6f2fb-3341-4389-ad22-782c606c622d.json and https://artists.proofprofile.net/proofs/artist/49c6f2fb-3341-4389-ad22-782c606c622d.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 0xabb079fe5e9b1db8833bf76f4fcf3d96e2e4ff57f56e39546349c51ab1d9ef02. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QMEU32100558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf4de3c7a03d0cfba818ff2fbeb32e9e4487afe553f21a41861073a0e4ed462. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QMEU32100560.
From Sulphur Springs To Rising Fawn : The Songs of Norman Blake
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd254f366c02ee9b9de3a72f6ccf6533f7b77c9e66bf289801c0f490f942160e8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMKYF2200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90af8d24bee01978c53cc774c7de952fd27a0d269a7ab44e506b8fa61d6ae2c. 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/QMKYF2200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da5403df7b1f49628d82217a02c767c4d8ef3fbd546aab006eeaf2ef54f64c7. 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/QMKYF2200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec3206d47ff97bd9600b77c17f52177d2c0f824fe48e3dd34d5296487f6fd99. 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/QMKYF2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17d44ed6347a21100db56adf5431374725b3d530c85252a045e6a4a1141a174. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMKYF2200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b76136e83d1b4748f0d01054287da0e84b4bb53c67912fd4ce88cf00978065. 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/QMKYF2200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ec410557e1d094f3d07bed92188ddcbedd5475562f601dd50669acc3693d45. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QMKYF2200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e7911269fc8d810e2746c221f087f77e1ffb2abf4b4d486f61f8d6670db801. 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/QMKYF2200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c373733ae0f06c522e2c8389b24a2fd0005f63c8b837c25adaeca69e38d78f0. 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/QMKYF2200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0b7dae1341df7b5ac1294833a1482e26f0dd06857398d63c9db7d84ae18c57. 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/QMKYF2200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d462cb6b6dc540277fdee88287f50d66d47b10c547310d38a9d790ea40133f2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMKYF2200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2e1744dc1f8e0681cf63afa707dc4add72ba7f083aa81939b8d63174934679. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QMKYF2200122.
Year Of The Locust (Farewell To Old Rufus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b24abfb26d2103b3afd52e2bfeff13f084bcd515ca66e6d1c4993d7aef0a77. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QMKYF2200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafcfdf9c105479803c4f284a38842dd74d8505b68963c8fc04fc990690d881d. 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/QMKYF2200124.
Fiddler's Dram / Whiskey Before Breakfast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a428de25d9e7e3bda5685f892e90d652232a98acbc18db651175ae8fb51e0ff. 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/QMKYF2200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a9bea150f6ea2993b6b13a723607979ac7a9b3074f8b38bc9253bdde6d64cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3U82500019.