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 0xf076e743934502067c3e511fe1c8ec2d75ca7cce3fc075fa36de9d3c96f981b0. 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/82f27d8e-639e-47c8-b26a-131115c5fd4b.json and https://artists.proofprofile.net/proofs/artist/82f27d8e-639e-47c8-b26a-131115c5fd4b.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 0xd252a418e76e59c6e33f729f754a559c64908391a141649669e8e0edc66ee70c. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZTAY2219648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c88eac0843a389e86b31b8fe6120c8ade9b711616abab2e2d73ad69d494244. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:46:53Z), 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/QZHN52307744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cc2b7e6ccc3c0e33e0208421792928a9067694d1a5a2990a732c6f15d33f52. 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/QZHN52307746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51bf98701f28806327215d3a917fee5705259bc21164e69ac08db788068b095. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN52307747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819b421e38dac1653d279bf8611f2831e05f8296b6b33c69f4338f5e2d829f51. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHN52307748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4629eff27ae6524e3b65332236fcf602b7b50f4605f62b0859423e731b701710. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN52392182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410efb527140bb0382ebcb314e054b2e3f300e977be2c7fab06e13617acc1267. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN62399506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ba4073adde657d136406f57df124823b50a09f0d1d20a5645ee47d0dd11b12. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN62399509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98e652b070d6491f5ec9e5d6c516b6579dfd6b32c1c3e409635cb0bdce3d88e. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZMEM2388843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e892c23f448874fab625e79417fd8ad477a7cb85f03a59916970c75d4a5a03. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZK6M2412105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dd2a98f936f08c4f572cd2c2788c3203f9393101b6c771940a777faaa4f30c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6M2412107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf289a74cebb881f969d45b7e07984979f0ffa77553216f104b3c95c48091c87f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:10Z), 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/QZK6Q2585022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c29c8703ed9dbc8633c44b908a11b1dddcfeee315a167aa7030b2953d725d62. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:25:45Z), 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/QZMEQ2551835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a9ab332e3295f0345c926d848dbb61fa065fa10ed139be17c51c0c77bc31f9. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZRP42546171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5929b20c58bcdecaecc979c10a3767ea18c0548e244e3433438cb7ad8474417f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7N2577774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3427fcc8e667c6f2800073a9dad1379177319459cb7d711b71306c7cd4ccaaf4. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT3FE2504393.