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 0xb4ef62135ff99d425d6b259650c46708ddcd371d5e11e40b231536996d29dd90. 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/85ae5e05-f8f7-4d83-9d71-5ee2524e5cc2.json and https://artists.proofprofile.net/proofs/artist/85ae5e05-f8f7-4d83-9d71-5ee2524e5cc2.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 0xd6be862c05e0e48068b2b6c47b30608ab710cbce0030f82f88f5be6a561bebba. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USA2P1614008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33de327d7b96f4bfab0728b4d45317623124179a74e4eb4358c24cd33a36e193. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:47:04Z), 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/USA2P1614009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa287c5706bc2287776cead2bea3c96035d81f96ef36166b4d3a447a05c6e17e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GBGLW2100458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646d4ef7678073f93142b295483cf8420c92de601c418987153d9dd192c186ce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2210524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab62bc8a581f9d7d59b3df73d349cee6e0a6ce1bf484ff45de7715fde39693d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:44:52Z), 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/QMBZ92397436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25609fcc237f78118052b682ec83050c41712397280adce61e81e3e2da74da7d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZWDD2375857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba758837a42f4879287668d4c2c8a124d4a9fbcdb2abf8eaaa367d3aca0f2f5b. 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/DEH742336010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291fe0a0e34d1a5c057d2df633480b32e1b2b4755034944067d9c1cc10b268cd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US3DF2497182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100506ea26635443afbf10fd22968a3fc2ed27d7decfa4d22daa99f7dc141a0d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX3ZV2400193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6baf8a989a782c9df0c79eed4582f55f61feae9e2b5a5981cdbe830dce7bdf4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX3ZV2400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060a00efe89dc51152823169b6bf3f9ebdb3c7f8669a72ffbab90fd1fc871d74. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GX3ZV2400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc281803c6da365bfa8d2f2959db6d84c19155577a3d5cd647b9744b94229364c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GX3ZV2400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42bb1baf081e15956dfc34a52b04284b3a3970a0c66524a91137c7ef0a4aea6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX3ZV2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353d989b15418868cccbdf3de3f705a9fe77423959d72f4b1c3531d98623273c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBGLW2500523.