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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147b9291039bdf263dc5ca3fc834c63b6f76f232c961d3dd96f1e49a5acb67b5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcd786cc-45c3-4bb8-bfc8-d27a1a902a42.json and https://artists.proofprofile.net/proofs/artist/dcd786cc-45c3-4bb8-bfc8-d27a1a902a42.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eabec2a9179f39ac4adfe7bf72280649f54d650ce897509b0b69fab281eefea. 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/USQZB1513801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bada88da4acf37707811a054a79c0770ec4ed402a2e38fec16f874f8cdff97. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USQZB1513802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7287ea284d9b963b31fc4320c2dff43393aef22af4366983aba030afd520f4c. 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/USQZB1513804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e13ade541806f226c31310e9eadbf7fc94c3c507aa62f37f3e85266767f05c9. 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/USQZB1513805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcddc2581ad4b440e9c0c8a0c17770eacd446188db5997edd7bc90c7bd2217a2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQZB1513806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bde677dde6b3e854b185b24438b2efd4543fbb25d7324350f5e6b5b9c846b2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USQZB1513807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5010941faf7405fc5033e8c1cbb804a906bb355364f79e2bf0378d9987e0ae. 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/USQZB1513808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb31719ffbdc3e257098fcf79f9bbdab533dc2cb042b3768ee818a278f005d6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USQZB1513809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0824deb3276eb123fc6ac31b206f45eacfa83776dcb3623d179a756591d56af8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USQZB1513810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7b03352b0ace406043b469e8a1c8fe0979626c1d1cda3fa614e2d26270e6ff. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USQZB1513811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419b0d419f94822b440f97e837b67367e674524d813953088e5efdea0bfe4865. 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/USQZB1513812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170caf9c29d8902664a54b1a3108d18bf8cea58ff324d826ecde3829543e0672. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:41:50Z), 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/USQZB1513803.
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 0x66518b20d2a6b70ec7d4a4967ad488f329b7aeaf9ad1d6688f14f82d3c7370e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US4KC1179801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb3989d6c1bdbf0249e4e3d83233d2e7462c6ad3248a6905f2b55f6da0b5121. 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/US4KC1179802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b816983da968c147465d39f91769082920d401ef4c2cd5ec64449ff2e7be9b. 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/US4KC1179803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c7beb28a062179f53aa82d928426f9b4603da2cfbe31799f5611fabeb65098. 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/US4KC1179804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8e0bee1d4cba299e2c5179ba0a6b90fa374700cd358b5279155ac178cff56e. 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/US4KC1179805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d08227b1433c3a15feebd3b6d33bb8beacae14fa3fb51305f38bbb08f5c55b. 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/US4KC1179806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc669d3bd5702c2d91a001e3cc5691aa8be034c1b1ae460c105a3b3343fddcd73. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US4KC1179807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739062e55d43903e302d862300a9205c6d62d8a720278fa98d7e4054708736bf. 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/US4KC1179808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc76a615469adc172a7ea9406a42dada058bbdc03d09aaab83e68b394171930. 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/US4KC1179809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3249b87bc843c722f4f4bff9955acf3b1940d9683d337d537003079f59087f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US4KC1179810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854890a81e2733975f6b331598672895cbb8b5d35fc071be4e828dddc9e5984e. 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/US4KC1179811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7168ea073ed8985676dd82ecb77367c01f12efa595e504f4050b386fcaf1bc7. 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/US4KC1179812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb758f8f54dd3677e54de4c214ccd8a3640dd3cedc1633c81b2ae3e2713ff2da6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US4KC1179813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbaf5f35a7fa7438e34b5761d680fd1daf0a16fc991fe071e1d163adc970dcd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKPL1964571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bf8ccb651118f6471821b53cab5b248df06219a6494076aa2b1b10fa1dea6a. 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/GBKPL1964572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc691706a52ce13984c93bf8a7c4afeddcef20151b018e3b75240480107eb431. 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/QZAPG1750399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f7d623835b763c21fb3b0c247541eca238225d3d0bd704e98a94ddb689a3c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZAPG1750400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda267a62027af04c4b7cebc9e54ce109c40a6d68520ee4c6dbb94fe3c164b516. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLFP1763514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c7fc3081d59111207d8efcc8fdb27fd00fd14b30d8a94bc7f1659501f46b99. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBLFP1763516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc276f58e3e3478bf97365ceec90ea16e6420bcb5564fe5309006191395f36971. 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/ITJ871500859.