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 0x2848bd5a051c22b4ca604fc5941ce39aa5036ada8f48cd77360f5bc5ad852b9f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd318fbc-6d6d-4235-b69b-8221dd51ac9a.json and https://artists.proofprofile.net/proofs/artist/fd318fbc-6d6d-4235-b69b-8221dd51ac9a.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 0x3e5817b41689332f780517b21a8d57e5b83250e9477f9df51aa3a694e8557f83. 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/TCADT1808388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22d6505725b8f4d3986d18c26b898a404871e952d7c83a2446e0a7d70aa9bc7. 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/TCADT1808395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547778f2b9dd2e1b1c560ac4f25a22f0adf9460d41f74138863285a2d1c0ada7. 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/TCDAT1808397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7e403ccfeb6be70c4bf1d7e5141d96344e04f099dea437bdfebf161a977632. 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/TCADT1808398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42a0fd1ad67ae6dff4209ad12da638bae305f9f4da282d06b80d422301ca726. 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/TCADT1808401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f8b29e8208b8ff176b7d9e2bd40a7f26ace45e16abb5ee26630d2b9f9e243a. 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/TCADT1808408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5a564928e2a1f264f1ea1954434eaaeebf24e6d417c5d13a759bee6e431153. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:17:46Z), 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/TCADT1808410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db5557ef74101225fb79771a43f95cf65f8934decd04bbd66f11d7e87f5f3cb. 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/TCADT1808414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6700c6324713a7cbecdaedd87297f4a78a2816426b363adfbb60934bd973285b. 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/TCADT1808417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd785e08f5ff189406ea3c2cee9b7b3745d232ecdfd160ef349b73cb171dfb54e. 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/TCADT1808424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcadd64aca849d407f4502d5869e84621403fb7ecf674f850c02c2ae1121d1fc. 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/TCADT1808403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9ac8ff5807d43f8f93ab9b00979023800ee1ca9fb699206bdd7eec7e131898. 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/TCADT1808406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcedf5ae703c60f2bbd74bc9af3484706df34819710afba33d060305c70827f7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCADT1808411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad174c6011cb2589968e608675033ae32f703511fc52f2f23105dc5f7b21a88. 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/TCADT1808419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfdbf869c065b7bcf98b79df7a327724893ab4f3e9688b9b3063a4f2dfb618d. 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/TCADT1808421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a14756a42d61a5d1e6858cecb3f0044abb3d30105d74e3bf81bf8d83869c71. 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/ES71G2330281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e689554240fef3199849e8ac747be88b6c534ad48bd266aca1daad7e30491a. 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/ES71G2330278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d7abb6bbe7ea13b16b0db2a702845da905cc40d5d9b1796eefcef8295cc1ba. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ES71G2322864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b70c66da1799cad7a4035a1e988a678e685e013de528e139e0c002e9752c98. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/ES71G2330279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c0c94047de55473a7f0b928e7f957be0c429fb0705427a7ff69aecc007674e. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/ES71G2330282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78fb227cbed51d964bebea449903db43d81c32500f4cfc941278d05fbae0442. 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/ES71G2053766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2875743b6fc07d49ab705302ea949fc42385e92d2fb449738ecfd5a2042ac07. 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/ES71G1923247.