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 0xc8b7038216d0b1a93b75ebc952af453231be03a580d2ae76885e05e15607667b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/644c55e1-7696-49f7-a419-e46960bc1bf1.json and https://artists.proofprofile.net/proofs/artist/644c55e1-7696-49f7-a419-e46960bc1bf1.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 0x967d1f486997c19cc65b12f7ac5703e872e333b92f304bc5e1cadd0836afb464. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-17T08:51:10Z), 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/QZPLS2244065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76b9b05abf28a76d1094f603cda9f509f7e17aa44c4ea779f5dce4a43552290. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZRP52224648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e28abe234e1c6f74749b203d69be29b0e9087a01b2b8d4d8342faafaed5a92. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTB72290542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fd01c72b29fc047a7c4ccf95b6913a2b2ebae1365af37b19fd962ca56f7ebc. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZDA72306922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85afa32b24f6c830a6684628d32450debee21ea335bbbe265cff2c709b646d88. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZES62319006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf812f1c038dbafbfd2a25d0070d9466ba53b3d2fe3f52b94d56ba34030e17ae8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:34:59Z), 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/QZHN52322217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80325ef36c8de51a1942071ce91ed0b01a49c33091234cce759916980c5e5d31. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHN62381697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6b1c69999aec97e8e383c66012bd91e85b65ca978d1237d2b9feee50a70238. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZTBF2336522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b7c2d813cbebbfebcce47f5009c5cbf1f22789d69c2df4edb029d70348f558. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/AUMEV2471565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461394f395d8fcd02cfc0c9725809b6204b834b5de2385b64cabe6386535de6f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPLS2473393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa704c2f63912ecce1868b31121f33ad0c0a608f0fd7263a8392a07b891bec809. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZPLS2473394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadbffbb48fbf555dd842fc9dcb7937f59805b39ded75bb8f5b2c78ece4be195. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:14:50Z), 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/QZWFV2437212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fe70a3d45e06749dff8909846caf96ecfa2f082ab2d7f924311c8a31794271. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:10:41Z), 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/QZZ7V2426635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1517eb3c66979fce32e8131596deb033df9c0372f20bfadfc0bbe65cf1bc972a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:03:34Z), 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/QZFZ72512359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe91dae71cc5e2d0ca04e0baf8e413de4b415097cb2e75dd4da5a5b08de9b69. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AUMEV2553172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8576cfab131ad943cbc572bef7698bd68141a19a29be3fb1b7ca45ca49e2f82b. 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/QZQAY2482588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8576cfab131ad943cbc572bef7698bd68141a19a29be3fb1b7ca45ca49e2f82b. 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/QZQAY2482588.