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 0xaa38f6fe455eb761213eb8acdbd192a549b3dfbb3812ad821bd4c4758a530d65. 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/3446c088-a63d-4a2c-a1c2-db25aab08f39.json and https://artists.proofprofile.net/proofs/artist/3446c088-a63d-4a2c-a1c2-db25aab08f39.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 0x1aef7d9c5a09bedc2955681b4eb518a8bf0a7952affb98812814116d8d666f0c. 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/BX8WE2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe931731f34b20bb985f84a347e7a5b868ff4f7f538bfe228734d6fb52c7f38. 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/BX8WE2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7772988cdcb652955de8c94b367bf4513c32a1d29f52d1e1a042c5dcb7878f9. 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/BX8WE2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff2a3f0ad7f91e91d07f4e2118942930af91541a8e807fdf70d99122617987a. 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/BX8WE2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf96b97e0e8e42f7546fcb899c0ac7d7b2678b02b6df0a0970ae8cd9de5d95b. 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/BX8WE2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9bfb45f5a59807c5932dcb6d5f936a5624b8f0dcd45a8e85b82c0f3ace38fd. 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/BX8WE2200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38957bb42af12dd89eb774609edf38c14bae052404b036b4ff7a530f77829c83. 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/BX8WE2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c4f554b903654b907599dfc1f41da03f1e724155c99169a2fc508ceae93615. 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/BX8WE2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd6c1de1c026164f198c4a481da6f2e24533db4c2caa9d0619ac91a1c570677. 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/BX8WE2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7484db2c5ebcfb118d96678791ec082d2ee613629d9d6b73a314fc9e36ef6306. 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/BX8WE2200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cac45a916bc9e42f3347a3d7fb2db914bc8f6a858c365e88e4136f92ce310a4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BX8WE2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b8894cf8c0b975965b764f46da1ccc43eec723b3da006ba999ebccfaf86b14. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BX8WE2200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0e47ceca9638b6572ec7e12cedeacc1e0e700dee914d22c3b4b339d58b4765. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BX8WE2200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12e4a0573b7b840c69635ec792c2471670c3a6862dfaeb108d826f18bbab0b9. 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/BKBPP2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0830bb9a2ec9ceb6c58fdf69c59fe62b66109a66129906bdcdbfe33aa746cf68. 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/BKBPP2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6091e4ddc9fd9390ff251264f1a68ced5c70b8a143631ba6f14d172381c9ccf. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/BKBPP2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd89050a4f7cfe59fa34e08f9cbd05f2c7667241b0c89d3536e79cfb136c01be. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BKBPP2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa529e6bbb652a1c8bdb240220086eaf2e1ea64035b5308dca27844f6ff908f63. 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/BKBHA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7785db6d90514ec10b1207de5dfffb030fa1ea232aeac761156f2ca35bef078f. 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/BKBPP2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f94ab5de926fe858f936aea15c6dfdabbc37a38b67f9106043141bbf186d745. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BKBPP2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63c8341e03efca5ebf609f2d9c21fb725241962fbb942dd2ab3c61ee72fd2c8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BKBPP2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0bcd62b42d903cd1a022fe8d7b49ecd9f781ca84c3f43f0943af033e2b02c1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BKBPP2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bac2e2686d43cf8e8cca2d7681b86ca867f00743cde42a7b2765bbe1b451d82. 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/BKBPP2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bac2e2686d43cf8e8cca2d7681b86ca867f00743cde42a7b2765bbe1b451d82. 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/BKBPP2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41bed0e3927dc6305c060b6ce839152a9651f7d4091af91edba7a044d43d066. 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/BKG8P2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b873786bd03e2758c89925e8840d968bb102a57379f39feca3431a2aabf3d81. 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/BKBPP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4e771932b046309708db1d0958a5f32e97a845680bc5470b1e0a894ab4863c. 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/BX8WE2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7772988cdcb652955de8c94b367bf4513c32a1d29f52d1e1a042c5dcb7878f9. 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/BX8WE2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66a9bf8ee889b9549210535214e55a63f0669e4c2ab35a9f5563820ef2047d0. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/QZMZ92217054.