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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b6e0a741c2bc559189a20fdd04bfe72c9eeeb85393928e9865804345294a6e. 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/7fecc30c-38d7-43f4-9928-1f0650754646.json and https://artists.proofprofile.net/proofs/artist/7fecc30c-38d7-43f4-9928-1f0650754646.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286965f7acfe1f8155428dd96b0960db449a99bc6ea2638feec0b92c42c7ec20. 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/NLHR52155902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628d5e384238f14a70b6cd8e9ebe8ca51c0e4c69d90028131b3f86a35cd270c3. 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/NLHR52155625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31e1e2b4a91979e72347b60b98f78fedc59166cb63e4d499421d3ceb41e9dfb. 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/NLHR52155923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027ca762113cb9da24ec22554d05ba17ea315b8fba05024bd1c19d0a0e1a1b4b. 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/NLHR52155895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dc2c294a37b85590e782fbff6283f1560bca2e48ba650bf098870732ef053c. 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/NLHR52155656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c23b27beea718636357eccac374e3ce12782c7243bff7fd974a592fe8e203a6. 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/NLHR52155624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ff5ca76ace4449b04e99afea14eb0f80a004bd90ffc5c366c2d356258bb4eb. 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/NLHR52155898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b2ebefc90062e1abd0031d098496f22879635f69a56d3326843686f87a6eed. 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/NLHR52155897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe517b455285582c8f1fb6b6d435559d1e51855374cdd0cc32178dd87809c0b16. 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/NLHR52155677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1d956140352fcb61f37fbd49247f2d585f9c44924b1ec28946887c7e6a169f. 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/NLHR52155629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537897d73b6f83fd182190f775b7e8d55a2214fb5c561b0a791529c183217817. 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/NLHR52155631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a897d436400d3ab553a730516c42273ea16e791926f8a4a35b9aec33533708. 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/NLHR52155907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb727403d13e4118dae3b464cb185541e0a3e5c1252d13c79dd0bea8321214e3. 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/NLHR52155894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a381d56c0b7ef0c34ffe4b1b24a1560fdf73e1f609a19ace4cc37bf4296fd0. 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/NLHR52155628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf43d6f53674e7d8b55a3e4f556e6c8f1d371c91377b6a437b295900c1591fa. 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/NLHR52155903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ce8b8f52ed955b8804a85525538268731bdc8090eae33a1caf025f4d7e44a0. 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/NLHR52155896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfde5330bc3fb280948faa998b7596869dd327afa5b9d5df66b5527b4c0e9c1. 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/NLHR52155906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c75a995b6c244fcf8d507fe85a63407cb8c7360ad940fb919ac547b67a4a17. 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/NLHR52155655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0e82d3dc95a6f94486a7069afb5d530ce1f2ffa956a9f7b4ff44d62ccf7a4e. 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/NLHR52155834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5361e2bad594c432ce1f46a59470db51c55e34d15acf7b8cdbee05e759edc90. 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/NLHR52155891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2328ed60e41194e4be0bd2965309dabde99efa4db2b241bca5427f811b4046d. 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/NLHR52155921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0c4cebec3a429998cbc2d90d5e16f4a2ce2a6d7d0101e7813d2b8abcbb715c. 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/NLHR52155899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcfdf64fa61ee0190aa408bf673943f64bdfd14d31ce224c11eabff053eb004. 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/NLHR52155691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d138c9798e2cd18545bd00575a615f2cf5abbb647058244d5a531740dac4a1a. 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/NLHR52155922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5836f3b16cfb1ccd22c5c3d38841ac59047f7ffcf09de1303db854f3347aafa4. 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/NLHR52155888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492db5bc53068aa01048cf4a9ca8a84f131b8340ffe90e51a14aa44b98d0e61c. 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/NLHR52155916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe551be910dbca3b30a79937882ea566df968c8309417ebfaa1769321ba39d566. 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/NLHR52155630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39ff976889b7757d8d3892142baaf0fe817082157361d11f7e9056158306104. 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/NLHR52155692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aba7183bdb66fa27d7b253754223f425ec38e5de4a66b12a0616b7672610da9. 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/NLHR52155893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c8951da9d6a4782eda23bae29aed9ca146d2a51a28b11bf01d7acda0f6b9b6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLHR52155918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00296ab6a4c3675691d02491c42efbc5b957804a04d58b7622b25d6b3b1b54f4. 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/NLHR52155900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3fdd17d1f85ccb44c57c01f18b756defb02acb436c5f7e7dfbee4ff6107919. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NLHR52155701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd94a03a218d61fe0580891af9b4a7a0703967b39fc934ca5814660fea9c55ad. 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/NLHR52155633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ef9c415bd11b4a9c23679df4eaa32c1d7075378f90468715c9f83041b5edc0. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NLHR52155892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8fbc58732964114e7e4a2bf1ccff9835441cb2fcde6ca03ef681ba3e7e7c91. 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/NLHR52155889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbf4d320b676723b8c550c65740c4f1f9a66df6ebbd152cb779ba2856255713. 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/NLHR52155909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39746a4b6c6f947229e3c7d52dcb0faf7ed3ba6ec470b838ed8a73a4c87a513e. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/NLHR52155627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2db127434742375e32832ba964b0a8ef697aa7ef9d1d4ee9e4254fcded7c3a. 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/NLHR52155626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786069f161e14e6bdff0c21be2f4462394779fd871f1c7864189dcbea09fbaed. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLHR52155890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc201de3cbc8b33e000d7850c8a201d14111618ceffe808f191759901d087a90. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/NLHR52155676.