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 0x62ce02d3c54fb732b2688e2c570622af01bf687a3c2444e775f72643d48d2c9a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2971174-0d9f-45f7-88ce-9759f6e6db62.json and https://artists.proofprofile.net/proofs/artist/f2971174-0d9f-45f7-88ce-9759f6e6db62.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 0x1910d9a5e06b072593f77f074defa4426047952e5109ea03411b69943fcadd7d. 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/US7VG1713832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b314b9f76555c3c94e8e03700e24412fe47bd0eaef56502e0ca9044b3640aef. 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/US7VG1713833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58e8359a32611ad2ff6ea9d510fab59d89eccfb9640d03c44b19cf48f9b0c3a. 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/US7VG1713834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0b095f8f48ac87ad4e4ee4950340757449bb4291954d02a24fbb233bf71d53. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/US7VG1713835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804701fd6573253cfbf9660ed42efb9dfc3e50fe5f52ad88fe3cd38ad6e2bd7f. 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/US7VG1713836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce067d61b88beb5beeee43906772e52dce1a81d056425ccb2fa8e8b8bf9ca1b6. 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/US7VG1713837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4e4782a146fc7e124507b6fb2562d9ad9acb48f78dadc223e94e6e525f0437. 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/US7VG1713838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dfbd0cf0ca762bb2c54fb08baa96a7db21a34a38e8b4ec90a32117f4d3acbf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US7VG1713839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b25b7c3b1fe4359a1086ccae4844deb7f596560893e5a30a1a27b5c28f7b7f. 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/US7VG1713843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d61d4d56483f3b1a5fb7ace3bacc4372c6adb43830134f5d32f6475d54f8c4. 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/US7VG1713846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa0a96d95d6408081750eabd0f8c39ff3ec9c057ad8c903ea3b4f246ca12ea6. 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/US7VG1713847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e0800d65fc000e927e40a19599efc2cfa24f2ef1186fdaf470e0f47fcf4ac9. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/US7VG1713840.
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 0x852abedcbd64bd5c82bcb99eb70b95b6061b494dc13a4dab84e4de6c2a743604. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US7VG1713841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2519ea4cc75cbd415cbd0fa186e8ce73d200c7aafa2166f48f5fa87d4b5a2034. 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/US7VG1713842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2712df197b6fda91639216e0f697cb70a879bb95d2648c8b9af5a38b28d9bbf1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/US7VG1713844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cabbea5f11d7e2b2957bdef46ad539b88740a7f6b24bfebc114d39098272dae. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US7VG1713845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b637973c2a171fba75557b70fd8fbffe6eb42b0dd47138adfe2025724f43c30. 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/TCADQ1891948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bd0615b696d8a78d078c47a50da58a47f173f43df905eea9d4b5df6771d58c. 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/QZ5AB1984111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0359c83ecbf22d289e6efec1f43f60e2301a3643f83a6ef08529ea1c53f7b17f. 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/TCADX1865091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2778909aece2bbb3f53965b0e520291afe8c798180ccde1dd0b974a3c3aa6995. 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/QZ5AB1984119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92393915a96c35fbaeb808e89b4a803dbdff314aa1a7ef5a4cb7ba6aa5355ccb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ5AB1984114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78dd1db8c75f802d77d11181569db7439d1eee00c299df5316eb186dcb44ab8. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZ5AB1984127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d4bcd4d4b8a0e20c27dfcb140fae13678d3dd34b514f327bb3937cad1a1d43. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAER2025319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403730e56b9e63730215f289d7373490dd4e4ceb70430699fe61c4a7f0b743bf. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZ5AB1984117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20ba7ed7ae4b14b1b539cc7cd571b9e23cc3d617ea0cfc9913083f4902c1198. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZ5AB1984123.