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 0xc7f1ba141655cf0593a0d8735559275b061521cca60836f95c3c569a1f277a93. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73c6b1a1-09e0-4484-9639-891da2ee8fa0.json and https://artists.proofprofile.net/proofs/artist/73c6b1a1-09e0-4484-9639-891da2ee8fa0.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 0xa88fb9dc0a9ab1295152ea7d220193a61e68f676f2ebdb24af704d61b997a669. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMCE71301704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcccca2430800dd70843497acf45c3a9517cdb4c3e60eafaab78f7d6e4222e67. 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/QMCE71301707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda490a772feec54f16c206ddb6408b10e324ec67a2e73027b67cf8815dab46a5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMCE71301708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb902399c00121f69d4ce4c9b7bd9401df406bbd438ab9774eafd4baf1064eab. 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/QMCE71301709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764e21c1d248a4b551d94958d47178616e0951de8316ca2ef8ee922166dd94bb. 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/QMCE71301712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55892cefac7867b0b5976ed3bc981967330d9ae4d2813940b5dcde999243cd8. 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/QMCE71301714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa690a902b6f79438601d769f4d52c0513b1b03d6cb57a379905a9b42c83a5d73. 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/QMCE71301716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba74e218c0f4044e8d60036ab7afc5d615001499e807e4f5158519af4e0a7d82. 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/QMCE71301720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547a3d33a0c55c0268fbd7b95fbf8ff53a284cbcdccd583fa36f0996f977e9a0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCACL1500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29ad215255dd88aaed62580374afd34b79ecd553cfb7d9a74a1d83b90dffb71. 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/TCACL1500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee116c09c122a4b7651951afa33a3cfe43cb8518ea3b19e43e96279ca5b940cf. 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/TCACL1500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5b0d3b8869f13c2018e609a2e6cfaff637f4984f37a48bff35a27cb6f5a3e3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACL1500233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b17582f0481a489703b5b9701d27d061d5bb1a50f04f5ca0bb0b8f26b28736. 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/TCACL1500242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4806ecdca4c96ad9fac1367ce61bcfd79138e4afc2d4f39ec08f1e3ca9b26d4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCACL1500244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21998840c9b98cbbf154caf7acf5fff324c097f23b99e32662c405d3de6a54f1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACL1500246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c2aeb27f429a56fb3025f66704a126a45ef8828d3ed937ae1684aad32ee261. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACL1500247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3584b477d889bf1f1f0aa02078f6ad43f909be6ee208d0c143be51472d0e7ff. 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/TCAEY2089034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3584b477d889bf1f1f0aa02078f6ad43f909be6ee208d0c143be51472d0e7ff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEY2089034.