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 0x94ba8b75144675494645ed04359282dcb0782f7d7696b67cf0ffce703ec3052b. 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/bee1d025-2f19-4ad7-9e0c-266612d63317.json and https://artists.proofprofile.net/proofs/artist/bee1d025-2f19-4ad7-9e0c-266612d63317.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 0xdb90d4a41cee4a2826f0b74db42fff4e82a043e1fa6edbeed7226eac315935c2. 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/TR0461500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a35f0b92339d6a07cf6dcd27d4540d050d10c7724a047483dd164caf52d3341. 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/TR0461500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcf0f376b9013687f46c80c51ea4b450706e692cbef54932b3858ead907c320. 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/TR0461500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7491b585d85f21dfee0ec5485756bb4e5a70afbb839d3ea774a55f088bb3ea. 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/TR0461500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387af509b867c013282bc0735a4eb0868823ce0507dfe17390f7192e82256f28. 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/TR0461500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a892e96bce03efe25163e2daeb0ec3d7bf901fd78a82cc1ec127a0d45249c99. 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/TR0461500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532dbddd98a251f0e1745f595e558b1e8ae0310067100566b74d8d97a3e77a83. 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/TR0141925697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fd1290539b46636cede264023b9bca44d9ca7019f24d3c4c2fe1d9248a62a4. 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/TR1530800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3904091d5cebe459fda0527e28a98d782e4d7fa49a88f55de3d9501af876c970. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:39:01Z), 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/TR1530800148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd03db9f87b88796bc957260bcdf4525b3ce57813fc888c6d96a16590e24011. 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/TR1530800145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdb8bbe2565db90ed3a5b33f5580d06c2729e4b472574c315b7145c56354f54. 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/TR1530800143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4ca4faccc6f87506572f2c8528498213baa0500ef67a7912c7c30e5b885a8a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:11:24Z), 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/TR0340600796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c3105fd1947c907d6d29a0b6b4233d2ed42613cec56244d60d40d0ab74780d. 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/FR2X41435208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704ffda3dffd086b8dd3ebb528f9eb689790b4d93c93847a46a0eb6896b33dcb. 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/TR1780903077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ad774af1b1ab5c6024180840802210454cb6cb42d250963801c570728ddae6. 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/TR1780801965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa303d5a85392bf255726376b0a8b3f1fee90089098d44d8315cf554fc064dfdd. 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/TR1780801974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0032fba53990ec55d6b7f0689db26c296e881e1b37833cff3fa82b5c0057716. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:43:50Z), 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/TR1780903094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1eccd414ae9a2d5da6ffae4d2e8cd9e6b9c9182de9dcc510b70340f05b9049. 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/TR1780903095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1b8a6b31972cb96906660c840fdb61061e380eb57216bffa51fd699014987f. 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/TR1780903097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27150876c5fd2c671ac153d786167a5c3b322925d6d844bdbede490a6c5aa27a. 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/TR1780902472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a779afbe016cb7dd2968348fade5a9f4e0e49eb8438530acac333e65eac55a. 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/TR1780903308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b4bd6e55879e839d4bea3f330b8e8bccc6c96dad465e2fed106c0f83522a97. 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/TR1780903314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deeb844099598f76adef8eac0a8b0e945aa513c8454de6af1b7e1ae79e32711. 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/TR1780903128.