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 0x23cde02dbaada9a7ed82a19f1e27801ad079bbb0658c336db2f6a1eefcc8046d. 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/dc0a381d-0754-4c4a-b1f6-ab56d029fcc7.json and https://artists.proofprofile.net/proofs/artist/dc0a381d-0754-4c4a-b1f6-ab56d029fcc7.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 0xae0d38da014f15aa2c09e95f60f1a7023e83c2b9b2d23a94d1afd87bf764473f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:32:21Z), 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/QZHNC2103286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a04188b1ab9069b21b665b2221a91e08b7ce334541d6c1daf232e67eeab669. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:34Z), 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/QZK6L2127745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1a0d4a39a4736d3d35c4d71a781670554b7ac91f4edf9741862f507d44e33a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFZ62362844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb43127c6cd39b9c4eb6717e815c1d4d13ae7f182f1fd8b2f0371e4046cc4bb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6F2343474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0b46497032d965a73f3c177ce2370721180ed2fb17a8e900990f6851055eb4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6F2343475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c88eb66cefd584e0db031bc036143cde2240ec7e84eb62de8fd1502024499d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYY2422312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef80f06dbb8dd9418bb06581f71f552e193ddd303105dc5c4cd669beb47ee3d4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN42423149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e81dc9875f366f5997fb3c705f8a7f6ef5eee9041d5d4b3cf17895af8c60fd3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZPEW2586342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2480b43fd848dbdc66fb63bde49d7949849af7ff154464e106d2d40c2daa953e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:24:45Z), 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/QZPEW2586330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2921a963e2672dcd962b2ca9230297a571144706259b47c949a64c23046159c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZPEW2586340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160913740068cee4067b85416584df8c836f2ab309a57497b18f1c158299b8e4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPEW2586328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb093a91e909f550e7811f9028b4ff9594e880d7cbf9801c6cbc7ab31e845193. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:54:30Z), 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/QZPEW2586339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b05589354901d8914746d14353fade5acfa3c9b8b31f00c0ae1b10578225b6. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZPEW2586335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c09e1991c6e5803dcdb883de5f6d3192f54fdabfa7d7b908ae439b404c16294. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZPEW2586331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecb50e53359de8a8c3063f2c1894fe2f0788995806c305a11ee70e56811728b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZPEW2517776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94885016cf0fc59e66f7d197af9a2467d0374035e8f26c0c4b06c1c0879b658. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZPEW2586341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df511df334b2e5ac58eb4e8656f6d02e8186188d9cfcabffbb6e40bccad035f. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZPEW2586332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac83e1d1f40d6d3a07ddd99d126a36c44f5d6f6cab6afb81d4dd7be3679163a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:20:06Z), 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/QZPEW2586336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aed46020e643188ca7492dc2b7cb35ffba77ac117890a98fd8238aac35b6abf. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZPEW2586329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4322a2ce1cfba87391d053f86c2efe5f0e661e2a6905e89452cb41f88b7ec2cc. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:03:31Z), 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/QZPEW2516002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3887621db006ce412149bb137c843b238eebffb4c965935cfd1718b31de5e163. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZVEM2550184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4261d41ae23ce97fe79257661c7bcfeb9db91779c0511db62d2bedd8893846c6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZVEM2550185.