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 0xf6e5a683e0c89b711297e5fb62179d8426d8484bf5e5b80afea9f73ce31b6d3b. 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/06d3b191-57d5-418c-9653-c6b021d2e1b8.json and https://artists.proofprofile.net/proofs/artist/06d3b191-57d5-418c-9653-c6b021d2e1b8.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 0xba8c2fc7d6fd01a2db0399683de8c2ae62f22967a6420d33a09957a824eb1ef9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZW9L2233068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9885a2afa25bee5dc8285ca7590f954cec72a80e47f25beb1bc5a817a59ab58. 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/BX6Y62400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb3a8a80cd126df4254c581b2f6922866f874d4cefa6798a7b8a628301c30a8. 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/BCQAL2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd379e410a8e6d364b355951a27a8890b89437c31c681b17d65f23a3374025a66. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZW9M2232071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69360bb960f9f8ad2890857519654879ce54a2ae89ac82ae8e3e3d7179e8e60e. 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/QZW9M2232072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d070a2f5af635bb66f7b12d313fd49cec0b18ec5a9a38703c6c2a2f31e5cb0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZW9M2232073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75aeb96d27aeec1394d5445fb2006bee690e53e12879e3acd7987b193a531c8e. 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/QZW9M2232074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e2c93618a9a4ca02670d489065e099c066e5045ed55f87e908abe373dbed66. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZW9M2232076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e593ecad815dfc0bd143b6570cbf3efb2da7a465289798324922675e3aadf6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZW9M2232077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a41e7394d765ef3cb989634f7d6ec3539ed7b870272585607454b63b1f6e6f4. 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/QZW9M2232079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3174d2b069255bc009b7b314d32fc31fccc82e4ace98668b97c2396ac7c13654. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/US7VG2365249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf948f4a4e141209ff435e800ece97d4cbee61f19c286efbeabd8e6e4e8a55da4. 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/QZNJV2214637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594b3d6494a9d38c7707eab1ec60fc039a5bb81a2244624019c6cfb1e2e1cdf2. 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/QZGLM2136211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0d27e738be7301f700673bc1630304d566df49c8ecb37e3f56c8bb48f689e8. 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/QZGLM2136212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda396282f0364f97888aa2792ec344df5f60236d7414706277165ee58760fbb1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZGLM2136213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bf9d1dad4371f84de965857064d4180ad0acdd4e1760009fec13f0314457f1. 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/QZGLM2136214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45245831145c5a0cffccd63f01fd9310a908d23ca50432e024c1abc890eea5e4. 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/QZNJW2019719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e01ab55c84ceeba7b2a7ff509b6dd0477d2e45768b805f6ebcded173f278a9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZGLM2219539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dd6f07441bab70712ccc78e7ab8669d727c195654ca311c34d4b1ccee0c206. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZGLM2219540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6282e6ebbd36f64d828d0042893e45de3d609ef4948cd0ef9c5d5afaf69c6a7e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZGLM2219541.