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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6454bf269788c8104917d372ca3ad30f87833087065f7051dc437c5be7426c1. 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/5a5ae11d-7b55-484f-8dbc-8ffb47f77772.json and https://artists.proofprofile.net/proofs/artist/5a5ae11d-7b55-484f-8dbc-8ffb47f77772.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb9c33517502d39217a3bdebe20cf079b03ff5a4ceb5d8e7c66481a28d25ccf. 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/QZNWS2373257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fcc8b0f5f70940e73a469ac8a9cd7fd756a2593d799e6ea0584627242c2266. 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/QZNWS2373259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6486258bb147c4343e9f997e49d996b5db79ffdc5196c9616dffff6804aaf08. 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/QZNWS2373261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f6a9c63078cbf6904d70734e1f27b30d8a5021fff9e33ab5a0ed50f90d49ee. 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/QZNWS2373263.
The Baby Sloth Is Dreaming (Version for Music Box)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a77336af5eba2624733c15d529dbd74bdbe854497a806a01edaf65321a3b63. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWS2373268.
High in the Tree Top (Version for Music Box)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5aada687b182b2d1fd2a7b328a53be43221d31024ab9de56e9f2479d0014bd2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2373270.
Hush Little Monkey (Version for Music Box)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b62515c8a0bf6e9a663b1bf31a155195549fa002564ccecffa3492af2a06803. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWS2373275.
When the Pale Moonlight's Peeping Through the Leaves (Version for Music Box)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845a0522dc66d21343ecbb7a24bd5e9b3cabbae755df7db022e23339b2c0892a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWS2373278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6da188ac34767f2343d3f76eb4c5865c07f0eb7da95e77ab3cd56f46673a57b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZNWS2373260.
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 0x3c3829d5cc8333125e65e69166ec7f70b881c187792d9b8f687a49f3b43f6c4c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZNWS2373265.
Little Llama Lullabies 2: First Christmas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fadbf13cb72a076d6a27161b88fda9fc94cec9607fe2a4641cada60903c1a3. 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/QZNWY2290066.
All Through the Night (Version for Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeec7f00112d11b18d6f0212dcee9e9098ae07a86c890e8f5e91c7f1ea41a260. 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/QZNWY2290067.
Sleep Well, Willow, Christmas Is Coming Soon (Version for Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b438fbb9a33faccc3613674a7e4542ec353550a6665a4fcf0984d8e130fabff. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWY2290070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729ad1313bbd1cfc146e06485dcdf693b1b97d1deedb50974fa0600bfbe6aff0. 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/QZNWZ2201923.
It Came Upon the Midnight Clear (Version for Music Box)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e9d9bc1a528cfb23229f10099f39a5bf09f0a7cea0dc7c2111b985da000dd1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:22:50Z), 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/QZNWZ2201921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19d52a5fb3be8469becd5bd1775d963975cdb979e6fc119e8c41bfc92321f47. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES52290407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdfe659c35f9c7201c3b8e3474ad4e73103429313e6ae9c6f7f7267b1009934. 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/QZES52290408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9858546252f6a0eaf3b15b3960a27cf378e51652669cc6b41b784c51b1e683f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES52290409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939b16dc378705364b3e91ddd31b3241d1e5cd653c5d380076ef893dbc0204d9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZES52290411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461194fbaf7bb49e7caffaf3e60f7e2b31bd8978776383acc17db28cec595bee. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES52290426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac00e59dfc263b4c3bb742619a685f5ba1b724141f61a926986346cab6f1218a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES52290430.
Puppies and Kittens and Llamas and Ostriches (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905bc8cef93a8bc0fd9f7267b6edeaf332d326234a58d53ee4542875c1fa3336. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZES52290417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e29663133ba3631c94c3ffa7c4a68bb494fb0d9bd7c14a4cf889015da46727. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZES52290419.