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 0x568def28f5f6a3bcddd074ddd0fff2d7ca4fed147c8fc1eceb84aa0b3c127529. 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/93fa4fc1-6d7c-448b-b808-c96f4f25af53.json and https://artists.proofprofile.net/proofs/artist/93fa4fc1-6d7c-448b-b808-c96f4f25af53.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 0xd336981142764e4e31a0bcc6190a6398af86e416ad935922b5438fc6cb40a762. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QMPKX1781977.
Nothing In The Way (Piano Improvisation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ecbbe82d3103628d0dd82a36c08fed83673e71053c973e781e46e838360b94. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZK6P2276924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda97c0dd22cbbff58fc5ac9267db4fe99ec37ec4a0d42b99a1fda87dc9c4b723. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN92510349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d34ccd17212a2bbb32f0503988e2072c145b4b60e509e56e67fedd3ef77e28d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN92510350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87c91f7e047edcd4a88985ab7af8f822fdd1cb14490709cbf405ada34f404ee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN92510353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24a0fd618c3f088d9ac6696bf8529b03b7c3e378ec4a7a80ea70762a5581743. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN92510354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8ecf0ba41fbc6a5d15037da619239c387ed83f0931101000424e4fd916a02f. 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/QZHN92510355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487c774f67c41d075b79128626755fe9beeef9032cbccff2a4493ec045cf2fe2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN92510356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2eb8e514b30e129005d83497bb28d5552e39e353ead49c21c353e61c81f09a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN92510357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5236e490612e10ef01c7753ec836bc653cf20f19e3f5cc326ee35f66f6cc35. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZHN92510358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc21560d6b8ef87d4a96728a5e0e96d460a440df4d9d93312a37fd6b30eaf3e0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZHN92510360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b60f50b88e31a2e64874cfac090392cf005280e2bb3d309bb9e8919493718b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHN92510361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9ff2921b865852e4c831f715b50d309111f331892d523d1e1978dc4db021a4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEN2575226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46378bb42968261eefd989d968b447e1251e6334d23ce59fd80f8f8b861b16b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZMEN2575227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35993015fe09f55bf6e0dcf53377750a48771fa6ff2933ed2c12766389c9d32a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEN2575228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafae7f6ac00fef59a344b1e4df0d7d8836879fccb928d1ecf2691a085646650. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZMEN2575236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fd77507c302ea81d299c06eb9779b2a71fd59f62ddb1909b159885cf35661d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QMUY41900090.