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 0x23ddf36f8447cf6d5d536ab1b5e7b479ce8eb78f51a2e81407fb315e955a87bd. 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/eb9fa82b-1517-4a98-976b-2f56d3984fa4.json and https://artists.proofprofile.net/proofs/artist/eb9fa82b-1517-4a98-976b-2f56d3984fa4.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 0xd80d5671b9301a1c6a6cc18e45186b1328703b29271da2ea2f1ea67bc0b11f83. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USHM21538185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02a2c11606d7295dc1e913fbdaf134106154afd6745e933f42aca0390942c18. 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/USHM21538190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f3d72ca2969fd7d6f6a18072aa52d3ed5c2b2a38fd5a8606f30ab4ea0d24c2. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USHM21538189.
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 0xc5872ead72f65c4225349522436340c80a28965c77af8b4fe49ac377d824568e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USCGJ1819440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970049387dd98ff8fc9f5d62cb7ac61b0c66028e6e655a947f63fb76d6b0b965. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGH1834260.
I Can't Quit You / The Only Thing I Ever Had
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03ff193c4fcac280e3b86c958ccaeb2b776b4eab1133f7730464594afad5947. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/USHM81723132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa5c39d74485b8ea39be834d4bb163d44539976fec70e182ef11b4bc0e321a9. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USHM81723133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59653d3d8773b302eb17e67ebbf6d415bf0090a8e8ff077e4991767a4bb9bd0f. 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/USHM21790480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067de12317b9a771fd49d231e2e68276b2d352541f3ef80cd28588830b8c5134. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USHM21790481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d92b19b213a18cb1f6aeae78a9c9600bcd6c6c4c133047de4a568d4a363eea. 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/USCGH1704713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a027d268a601b7af50df8eaf7bc4264bc4c2b0dcf3fe3409ef2b4ee5f9c8dc7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:49:47Z), 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/USHM81637339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4278cbb96bf73cf53e0db1139ffd733f36c1d4a1b823752357898e447271a5. 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/USHM21677168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49c2839b20b069a717a61104a278b72ab643159d0bc808f9d270a9a21948e5a. 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/USDY41690116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe089b286f0c108f8974a42029346360dd46653d6bec2449492a31bc2110c9ed6. 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/USDY41618093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10234e97a4535f386fa13f64a0a5345f7dc0ec501fb71b66412848c506dea4ae. 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/USCGJ1589512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912b4e51cd61608fdfd08b95fb0b965666bf0b9e9424b31918d234adf88ada11. 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/USCGH1557164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834b11eaf4130edf31d063c49db67de2726ea23e2eb9fe056bc63a3613516296. 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/USCGJ1621209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fa87b33ed830c4729f88704a0a3eef81b5333b2c0f19c0d060654a435b1184. 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/USHM21544091.