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 0x7f7d3f363da683980b72cbbae2aa8723579d9ba39bf747205649220e1d643fbb. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73f217d6-2ea3-4682-a5fb-f98ea563c8b7.json and https://artists.proofprofile.net/proofs/artist/73f217d6-2ea3-4682-a5fb-f98ea563c8b7.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 0xadf14070ffd45920915716d40dbb854955950efb5803c24358e8f611e8e7b81f. 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/USA2P1423412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a51cde6708970199a56622229187195f1db98f6296506c7c6eea138cc0cba78. 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/USA2P1423413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6116df9a5c4bd2c23acb94a4b6f78a81e956beade71e12ecb335447056e1dfa9. 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/USA2P1423414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc482614107bc71da6abddb41b96bf4f04124367fb8d49b320367a1ceebd7416f. 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/USA2P1423415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4204238a0ec501392d94b3cb975997ec5ea98a000103d16c32f6800a0c14cc. 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/USA2P1423418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33df1a4521f7bb214b58e6ecffbd8fdad2407e21b19c7d5fcd1b391abddb92bb. 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/USA2P1423419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e761e7fef8319b4c800b075a76e8634c01d38277b9c18cb46b37ef6df9318a. 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/USA2P1423421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92165d4ff5e02317d9108faef4a633da031a05bb64ce45ea124795c26a24fd1d. 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/TCABK1251917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e9bdf3ee78414f0eb46b962600ccfb04d1ae1513ef432c58ed6fa0d3d1b9b7. 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/TCAAR1049153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14498242080bd493b92feacc582d0bcf2896313523b6445d6fb5212e2b848313. 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/TCABY1415362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710afa0ab13eb8d619f27e64640298561bf35cf0f23b0b80a5b81a58779bb16b. 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/TCABY1415364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01656a333b62038308acdf7e027e358c29202443388b6f3645b40005b7305c5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:25:05Z), 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/TCABY1415365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1170e4cb2a76c6a0505ff221dcd6d6049acce430ade4d556d77bdd6a1ccbac. 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/TCABY1415367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c8d5c5471b12eaf5dbd435c27ea77381c9d61d99b149353788004125dd2584. 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/TCABY1415371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a12dc967e867a0edae53686296aa18a336d8b96fc7eb78ee7f83deb9a99ea84. 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/TCABY1415375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea6336a6cd52a007d2712095fd82db2ec490f0d727060c2c189aafdae6e6ece. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCABY1415381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94a4cc96e61d12a2471c33919a6bcf2b3f70a546e0ad805ef4de1e8f3fb5a68. 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/TCABY1415388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff27fe858da133e55de1d93695b5086e365e6fc8f35ec53f95ce19c1aec8261e. 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/TCABY1415390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda67e6f62db53194650d9fddf3f1aa78209dfdd7d80a9944a17a01ffe8b111e9. 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/TCABY1415394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dd1f506a7c88144d01739aa81077f055d8d53525807b6208c727a680e89db6. 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/TCABY1415401.