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 0xd352b99261e480dc54d593bde99b2dcda38678333bcfe4ef689876a78fb5a121. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dad8f58e-fb92-4afc-8370-5a2826b675a7.json and https://artists.proofprofile.net/proofs/artist/dad8f58e-fb92-4afc-8370-5a2826b675a7.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 0x65a91c2f0dc7d686ce495a7e8da703514b679e66fe4fa3419973091658df2af9. 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/AR1T21500013.
Nunca Te Miró una Vaca de Frente - Versión Sinfónica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f773fb3f7da6d55fda6e5e5e419d20cfea7fb741c6c3def6fe9950cdb142821. 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/ARG9Z1500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839d489194b969e1edf77d4ec5cef8ae7c377be97255fad9ecfa18108df78496. 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/USV351454398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb41a9f67dad2518715a8962da9ff857f8fce5806811ba2813e6096edd2c78c. 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/USV351454399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf969178c3e5f052f74c6a45abdc930b9b71aaf958651ae2cdba1698a265b0e7. 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/USV351454400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e9b2da95797f9b5d872eb82d7ca4f094455cc4841e1c624ae99b365659e23d. 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/USV351454401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4396725b1a6ecdf7d45f413acfbf53662e016969f168b869bfad1e1c3f8c566a. 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/USV351454402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcef433fce3e7bde72eda50b96bd0585e64f4106a58af66f9065ae052c632ce. 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/USV351454403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8c632a32436d86533466786f9f83add602a2c13ff7de3b94f733f5b68b7969. 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/USV351454404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3145d925e7eb8acde98bd4ec951b1a487d038bd92439e5409002aa3fd4748434. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USV351454406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54a8808854f71778c550356f13759eb6c6aa166a74e1c66c9cd53e4cf236bfe. 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/USV351454407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3989106fc5c3c868ab9cbf4499ec3c8425c66f5c8c0026ea9d6c3ba105f3a2d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USV351454408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8a10662c51b3c9d6efeaab4df1b71fe37b4c65f48c1068b5e747e6b74075e6. 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/ARC571502200.
Cuerpo (Canciones a Partir de Mariano Ferreyra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae596a02b3d5034a306adef64ebea84d3f90561b6be952905b73cd637fb07844. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/AR9PJ1200001.
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 0x9e43561b0fb15987a567e93a2dba0cfea05bb5d841d0815a56842d679b2a61e3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USV351454405.
Una Celebración del Rock Argentino Vol. 2 (Almendra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa629f157c207cc85c466a8d3bd50cbc35d9292967a12e8fc5733fdebfd1c2a10. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMFME1522601.