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 0x92d5b11ef18be403603986c8183471dd983671dcdf9c439af95ff0a3e05a64ee. 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/c36e8085-56c3-4c8c-8834-0b5ea8223eea.json and https://artists.proofprofile.net/proofs/artist/c36e8085-56c3-4c8c-8834-0b5ea8223eea.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 0xd49ea7cad0ddece68fc9f6744fce6486e08e64b387c3a2bfba8d099d518d7d30. 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/NL5UZ2400707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae282f248ca15ccbe5f4ee23bf8f6a58ce337f291ec6ec82dd9334effb36f81. 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/NL9HH2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c966e5b8d0bf304c16d2f753e89e708605340e4c3a3f4e7af5b62c1942da39d. 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/QZNWS2494407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6828f5b43c9b1664b5fcd6395bf55365e08be3dfa2afc79f4b19376da0757c. 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/QZNWX2438706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e25c642b39e54af127ba6c7a0a86800a5cdb7bbb5a52456ce8f536b4eee528. 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/NLH2P2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9e3a2f650b51635035cfac6bf62db6aaef8d321637fd8efbd79dde628b6348. 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/BEB682200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41775f52091ba45d50a95ac9fd2037312e35b1630da1451ff75de3a831329a3. 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/NLH2L2200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f50a38650d60b3500b5f2c4deabf0ef46bfa773a37dd0be5afe770419e11c16. 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/NLH3Q2100854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ac0ca3c8cd23af870136709bceeda60390bf26961bc86b5b8685d04ea9aa92. 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/NL9HH2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b8ebeb542920b4c8029b419eba506142529218108938fcc27d2b936a3fdf00. 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/QZFYX2520523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723ac069da6bc2ac07c5d28ce81ae7875d294d808d8ad6042943c9316333340b. 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/USX9P2476094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c6ebb16ea3bb550c95a472dc92806ffdafb78fd2e68ba01b4bb0915c28f530. 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/QZWFN2385071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5630512f5f9b8fc72ef780c6a53c5fb576058330ff9dd8d6b9fb78f130e48e3d. 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/NLSB72300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a1aaf3024823b86444a2610512cad9dd172300804e13a415530726e2792b8f. 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/NLSB72300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35894e17805a6ac6c7e5f100a7174f4cb129786b7b62eee6203f5fb32b67015e. 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/NLSB72300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079dce3564a8cfd4e956f9c903dcaf0e47a073ef8f9c4d805d195f7d25407f83. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NLH2P2200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7bd496d16895159d86db4c2fd27b974e8d01ea46aab7d78a8c5cccd5fd4fd9. 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/NLH2P2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa63489da4fec510e169cc8120230604d6b883fdf9a2e76f1ffe10a3946a46b. 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/NLH2P2200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeaed4433fd99a5e3407081e902b744cb61a2dc30c4f27301befd8d5e6c9a8b. 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/NLH2P2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceed65e9b8440e624fe6cc4bc92db23c68d748822bc0de0083ed88d43b8af42a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLH2P2200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d5860ddf4bdddbd184b4078aa965e7fb265dc7cd535bc219ebcbebc86572df. 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/NLH2P2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091f7cbfc11d18239ca07781fec8c4ba3cee5fe63a3fb0f03ea843694bd55ce1. 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/NLH2P2200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad6f35290728047b1e9e8e8f4260798b93403d78af82beed0bf09b058b1a768. 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/NLH2L2200264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e25c642b39e54af127ba6c7a0a86800a5cdb7bbb5a52456ce8f536b4eee528. 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/NLH2P2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fb5d3414c21f40ab52ef96aa1ded2191e7c7a7c8a5bd8c352b47fa72c6b67a. 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/NLH2L2100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1056b6f9d8749e06d6c9980034d139e2a345bc7307dcccf273546fb13cf6f27. 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/NLH2P2200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe73e6ef9c76e6bca9b00dd7ed35cc35c54a9e9c180a3888ef6a156c3477d61c. 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/QZFZ32430570.