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 0xb0474cf0c0fbcf020f5e1b20a2189d57598badf06079d03f7a046e9e85856c23. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/155cf257-9cb6-490f-86d3-bbd817621839.json and https://artists.proofprofile.net/proofs/artist/155cf257-9cb6-490f-86d3-bbd817621839.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 0xf4efbc66ea5b911dbf40b566646aad7b2b3171cf2be08096fd198ead8ced2246. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BXIV82455884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270a36aa54ca35a782996159c30a8482dd0de7da984ee1116eeeeecddb53f595. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:52:11Z), 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/BC6M22408503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb6d995429da73e2517893599c00a86d3b28e314ce0f26c7238fb5c1a716c0d. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:29:43Z), 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/QZTPX2525064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06e79533d6bf78c9cfcfd70be296effea6dde4b4d06cddfd7a5d9e074795f20. 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/BC8Y92400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d69ce73aabf410e56da51193837a61454971962eac89a6a1108db1662abd51. 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/QZMZ92529205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa3f10e9fb90c33cdc5c5ddd7d0ff06154935db3b6a9580fde2318cc0c22654. 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/QZMZ92544397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe54adffddf9966a80289497a3f86f3ac1790d7a30394d0c4588492131ef8e43. 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/QZMZ92544398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae502ddf54daecfb186e2abe5e9f63d16f1d515ca57b437a5ed77a0db7fe7080. 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/QZMZ92544399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9c720d25fa4d9d58d68b08d9bd8950dd5f4ae5d6b0b403f5544d56c3c24d80. 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/QZMZ92544400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d69ce73aabf410e56da51193837a61454971962eac89a6a1108db1662abd51. 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/QZMZ92529205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a51d49270be359bda5e2344c647719c4102b4742fee68e394532f6a482f840. 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/QZMZ92544401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb206599dba2ca5c27d605ccc2b69cbb120a97cf86610086dc2c332ac383918. 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/QZMZ92544402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0490566d24c3566b08627f4d891a979f28282095c42a56f25bcb2b9419d4b533. 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/QZMZ92544403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a3c15b6abd03d52a2d983bb2b481d3ec7f64ff38aa68e893080641384fb29. 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/QZMZ92544404.