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 0xd315471716aff8bc9bb08d6853d852520230711a3001c43c592096ba23fde584. 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/cbf9e265-b1d4-4776-86ba-e4e6f2ea50d0.json and https://artists.proofprofile.net/proofs/artist/cbf9e265-b1d4-4776-86ba-e4e6f2ea50d0.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 0x459c3a4f31b3c15772750fc3cac3c11fdfbb74e871e5c92dfaa0bf84b186a287. 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/QM7282092653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd697d8e2c454fbda1be2863d23ffc053c6b56e0d66698df6208ccd04e6afe0e5. 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/QZMZ92015595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c195d83092ded1af16a9048f6a4a90db9454a6e55ebe0b5262f3af6eb4f33e5. 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/TCAEW2058592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac39cbfc918c7ffb2c9f119402795635447792bb57e361f1620b53a5d996ffc5. 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/QZW9K2237870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb1cea70e077f473efa8350a0f039579f0ee42fdb4d16eb8276bb12ab8d9718. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZHZ52144163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b680349ed81eb85c477b60d8b7bb9a6e56cdd4b1669e0a4b36cf7b04209385. 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/QZNJY2110257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed8e0ad871daab3a14bc5b0dbd4009003e728fb9bb33069bd88a44cc8345ffc. 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/QZNJY2110258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b2822991294721b2f8f686a6a0664180e88f9f5dc1455da92101a3745c0d93. 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/QZNJY2110259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb91028aee30070128d5deaccb5fffb7200d9ad22e59ac850eee396ceaa97d96. 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/QZNJY2110260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf36cdbf6c115e0dc1d8d64aa079c406835abe8b58e95b530e4d3bbabe4387c2. 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/QZNJY2110261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e4a9d6e99f8aee18c6231e6820255e9b5a2eb0b0da38437c32a5df60a545fd. 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/QZNJY2110262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4372baf81646cbeff748a733571e0e655e57590b0c4cfe2a6cc45c3b82310f78. 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/QZNJY2110263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c457f6de62b5be340cc54300fa5f7154434acc67c2f44810e8040a983b40a98. 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/QZNJY2110264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfcf414af9a0d285ffd7a0fcb0a5af7c7477e2827055db291c4765ff216d3f9. 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/QZNJY2110265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbf53cbc806183f880eb02ee3a09a1f5cd94699fbb89360bff974dd2c18d279. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92052931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c195d83092ded1af16a9048f6a4a90db9454a6e55ebe0b5262f3af6eb4f33e5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEW2058592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2f99ab6eaad0a122f8171de56cf93407046a6fbea57e91f9f91cfd9a418401. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEP2068732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a29271feb880ae228315ce48b4114e33053f9f6f099764f9a367c93397ac0d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAER2024776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0066c8016d37545b2b52e752beb9e6bb6cb4c9beb707a16be72e1792c30d87. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2052302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf0d654ef742fe1152242ae23917c037a836fe3114a068b35af5337b94cf877. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEH1950937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497b38c5af2a8b72d85778ec0102a4ddbe6dae8ac0306b3ecc037de0a9625de3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEJ1916346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ef4d004fe4cd05573e0914764e6e638196cdd05967f2a46c4a1509723e5220. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEJ1916372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781e247f36686936ffe64bbe91af7d60723acd8e9b7183e3c8925ff931c5f417. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEE1912482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cba26d1be9b67773a4b2a863cc7d54f87ba6126a25175489839588cef6cbb04. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEJ1916393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e22bf1d81fc88247656db5483cbac3f29b82aa14c5c05dba0af6dfd46832e61. 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/QZGLM2355260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9229f68be0a1a80a0c2a2bcccdbd6cde67a782dbe78758c7618407488e856ee5. 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/QZGLS2221354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb1cea70e077f473efa8350a0f039579f0ee42fdb4d16eb8276bb12ab8d9718. 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/QZHZ52144163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b8da30bf87ba138a4f2ee1ed3cd52803d6e68e76b60622831162ffd133a11e. 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/QZNJW2052271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c195d83092ded1af16a9048f6a4a90db9454a6e55ebe0b5262f3af6eb4f33e5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEW2058592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a29271feb880ae228315ce48b4114e33053f9f6f099764f9a367c93397ac0d. 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/TCAER2024776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2f99ab6eaad0a122f8171de56cf93407046a6fbea57e91f9f91cfd9a418401. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEP2068732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8198ee24c2962afc8bf8c48cf1a98ef39387dae15c7e80d42a416f23d1c3a9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZJPM1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1521b46446b18dc4d69f1d293eeabffa4e83dc84cf1831c8e2df16f57bb114. 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/QM24S1841018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdc7b5b2ff44f5cacc2aeb16704b93ed218f85dd7996d9a965f89a3b7437ed7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S1806784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2a3d897806c18cd900ffb4ec45c7cf1201a5506e287d08bc43463111861402. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ESA122498839.