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 0x9d1b97ab5a8fa37f34d354c14a4b6992b29556a50d1b48c17a29b1ba46f010e3. 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/7dc6722f-5af3-4e52-8894-b9f1238eea3a.json and https://artists.proofprofile.net/proofs/artist/7dc6722f-5af3-4e52-8894-b9f1238eea3a.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 0xcb5d73987f4597cf78809eb0c6287177c7c17ee700e087187b996db5c4959654. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFZ42226766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad706124171e0a4570f867512ea4b962977a61ddabbb21b900962eca3673f63. 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/QZMZ92239840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1e51ec24dc06c4f8ba0732ef12d6872f9003c910fa9e7a1095caaa06a02a9c. 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/QZMZ92239844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fd7ce84b137255d5476f4a7e4b5647ba4cb04e6807aa39c20622ad1ba0c09d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZMZ92239841.
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 0xef6125bea55709e64513ac2cb9aa1a6eb0c877f3a88e7847674206c17ed359ed. 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/QZHZ52270036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5244c35656741a367eb0a024bb48d9c23ca110f0a3f0ae67a58378b6acd6e013. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZMZ92239842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed7779495ff43bdf1e71d736e3549bbe0cfa5a5f844fca81a47ad35b1db0945. 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/QZHZ62239789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa87c0268529644ccf79717717d31b09c0f99363fc1a1e0a14a2caec70887066. 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/QZMZ92239843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c5d98b041d14ef14e5f86781cff1d30b90ebc59115d7c09fd24fa65d8b3837. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZMZ92239845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e8671e265f5469df5904be90252c0492c9518cf27f896f8356de06cda9a40b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMZ92239846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df5a7830c515963d4e23711d1dc324699ec7eb33a9e72b131e2754706721d1a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZW9L2291501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c55d33961d52a17fdf6cb80e46876d46293d1be1217951c26d036b6483fa9b. 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/US7VG2319350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b778d6c8ce3fe1be4c68dd1c967a9d3c5b6b6ddd4fdfb0d652849394458060c. 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/QZ5AB2333644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e9f367471d27f17a6f8b18cb84a2237ef8a7d6782281a1c30b040d55c52797. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:58:59Z), 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/QZ5AB2337521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ee8a7a3b925b5d8c01e77675678c67c4f39f2659b07bbdb0a66da01d89462e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZGLS2337506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1c482079c202579e1eb76b8ac57a6d39813ba32168f9d9101443f0a4aa120d. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZNJV2346825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a48272c77cd6e39d3501ed4f83e6f02752008bff2a3ca01a96b7720047494e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJW2330344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad90a9ff1a276637836fdcfce4b3cd2df2b0b55eec717df52671a75203bd544. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTPX2302609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2267765721b7f12c6bc87d47be6a5d2e013a7969c53f298060c587a0ec2e5911. 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/QZGLS2435101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f79985e5c287407dfa1d3984e99aa60ad369a9d790f9a980522216c2fd573d. 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/US3DF2165327.
Cantará la historia - Canción colectiva por Palestina
Cantará la historia (Canción colectiva por Palestina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1498c53f93848719f0205514ccfbdba81f35e319249375b8e8c1dcd7da52ad8e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6P42444799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e8e10dd3a3d52f88be37efce2b7a1885a25397a76ba5fcae2b60c0fba32b3a. 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/USCGH2299232.