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 0x6e3716de87ed27803929417c4328acc24d68ec2d54ffb09e340a0205d0bebcf0. 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/8bf5fc64-8c41-451f-9685-64a6da3c7100.json and https://artists.proofprofile.net/proofs/artist/8bf5fc64-8c41-451f-9685-64a6da3c7100.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 0x95bee6a791b22b2e29885821ddfefb90c95ccef03d812f1a23d8c5801db5a126. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USRN10200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e0a6d584b8c626e563210c855c0f19b68c9365bf566a9de774802aff27da69. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USRN10200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fb48d2854e555692ffb6f602b96aa395a2e3c690a8085cf3b6830b78866215. 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/USRN10200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf7affc05079e3faccd5d2d071aab82352a3a2c259241c81ff0314dfdbf9051. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USRN11300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04a4901873e7dc9740da26d7f7bd4aa7162aab673d9d75b797c4fd4a8873f2f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USRN10700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8345dc49d86bb0f6d6e72de1576e1c04cbb0ac53a03efe3147a4e273a27ebf75. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USRN11300403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5be3bfa738e3f7496f4ca7d17899f85ef4179e6602ec233f405cad184a76db1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USRN11300404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b405d4433a13e4de125f3b5ff6d6bbcf7ea5a205f5047bfd61c3c87eed7366. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USRN11300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7989f483290dbed9ece37d5aef6df726b85eefa6989bb96a8fe6b47d291f44. 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/USRN10700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc880c75b9a0983b55505f0aa148d4ddbf3dd61ba8ad7af982d119a3168c4f4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USRN10100737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e0a6d584b8c626e563210c855c0f19b68c9365bf566a9de774802aff27da69. 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/USRN10200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fb48d2854e555692ffb6f602b96aa395a2e3c690a8085cf3b6830b78866215. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USRN10200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bee6a791b22b2e29885821ddfefb90c95ccef03d812f1a23d8c5801db5a126. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USRN10200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc880c75b9a0983b55505f0aa148d4ddbf3dd61ba8ad7af982d119a3168c4f4. 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/USRN10100737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664307ac20b3b07ce6300d423a35d94b71fdea99ff6c83db60117cdec10ee5ee. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZ48L1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3202668a7a2d0fe8952fca0c108b2ad8f7603fef8f70bb19cdd271dcb251f46. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:08:44Z), 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/QZ48L2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c345325656b0aec1ce8f2b96766c3f41105ad7b1cf206d90874bbdb723e7e96. 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/USCGH1561956.