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 0x73659952ae049e1ed08b7f38aa9db4c01339d36e289348542b50bfc3eea196fa. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcc78d30-cced-4828-9677-740c4446b5cb.json and https://artists.proofprofile.net/proofs/artist/bcc78d30-cced-4828-9677-740c4446b5cb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Before Beethoven's Wig: Sing Along Classics
Beethoven's Wig: Sing Along Piano Classics (feat. Richard Perlmutter)
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 0xf3f57c7368d0a79ffd3a9a147ec6b5cccf18714b72495dde423bf6485450c0a8. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TCABA1104984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3542a99177830eff1adfe25098b0e969d3088fe42c5e534c94299b58a6fa390c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCABA1105002.
A Piano Is Stuck In The Door (The Entertainer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30e35e5c3b57e53ba011b807673f74212e326ada8fe0bf2e457a8c2d9a2b3d5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCABA1105008.
I Like Art (Promenade from Pictures At an Exhibition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938ab06918cd173e208817e1e58cc47db53dd5632fc947e9d1b7026449d36c1d. 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/TCABA1105011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b34cc502383c1852856e4b8661fe291d7c9a0d230d03f355f0dad77e3551387. 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/TCABA1105020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2b132bed45d9f9670543b3e4256e45f7997648dbd67167e159f69dbe44eb36. 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/TCABA1105070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af8e85f3fa1f46e90bdcb5dbd81cd6189e5ee5819ed2bf6fa558223d771e524. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCABA1105099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a53554f9bad5d6f53036a46f45ca59717ac60c2e9b0ca018a000c5f987b8a4. 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/TCABA1105158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230c46fdb04dff32c6a7984d3af793f89f7f725ac662e8c08fbdaa87eadf4819. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCABA1104841.
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 0x9a20a992a123c0278e8c77ddb945620de513f3bb1af2088b3facf1ff148cf3d3. 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/TCABA1105014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52c4f4e1adf687ba090375aa33cbe9da768f3f01d4baa829178ed4a1e77f757. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCABA1105046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4af066d4d1a680a07606f45e2043486de61adbaedd0f2c4cc8f006766181e4. 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/TCABA1105051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de5c087773fb3be35370b9fc0f038776af04c0ab8dc261baa615607ba89e28b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCABA1105062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef1e090b1e128f6fd8769f1f6182b406f39dbb1788ffccc46c26b60421740d0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCABA1105067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9277eab69df8b54ece94bef931bc7d5099b77b35b8565cb8a61c59aa9aa18c. 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/TCABA1105073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baa3fc70ed6adaaab3332a75bff1f527944190b12df14320e58c8afe521880d. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/TCABA1105091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e37deaf2f8530c8ac59fe75f027275488ece513626f15e7d8d0b242cf2e0055. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TCABA1105126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346e0e923b3308cc3426ca73482c725c153e499013901dfcc827df2ae8c89187. 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/TCABA1105134.
Promenade From Pictures At An Exhibition, Mussorgsky
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421c4ae410c79e4072f3b8a30a6d9595f60616f53c48acaefd62480af8af9c14. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCABA1105149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ed932ea570bc7fdb2f193b1ccb082d3dd6694c2a93b79172550fd7aa97693d. 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/TCABA1105166.