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 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 0x46d275fed59d9eb045cf1fe5a8e3a67075a199d2c37d3bc53be22e8c6b32ebfa. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10169527-941a-420b-8973-9a97686af987.json and https://artists.proofprofile.net/proofs/artist/10169527-941a-420b-8973-9a97686af987.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 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 0x37cac0ce2dd65a06d937f2a9dad05ef05f2ad32cf2c5001f2dee8cf4769acebb. 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/QZMEQ2289260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19591f593c235465069640b3bcb507c2b6f21c02a24f06a00d6fd1baabf7243. 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/IEWNQ2500009.
Irish for a Day (A Song for St. Patrick's Day)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efe07a42ee9618f788798641dfb22add9961928c182cff6dc79fd89e160bc18. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USCGJ2209912.
I Had Two Friends But I Only Got On With One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa844114c080be9fed36a96f7ab48eee06d7743d4e346f812c55a0121ea5e2c28. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/IEWNQ2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cff7aabd2a964db3b1af4781d77d372df1d00e9f54b9b3523744f2278c4fe13. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWV2351962.
Junto al árbol de Navidad (Be My Santa Baby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935728d8b924ecafe494ee3a0d206b8c737b926f398ccae8ff7bf6d9f1feadb3. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZK6K2299884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f62a4d3d2b3f41b8aafdaedbe036c3ae2faa5d654d91ef7ebc908d4b95295aa. 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/IEWNQ2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d684892789a95c61b909f5a7b7461547bec2b579f7b9f11da8cd884589e559. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA72374297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cff7aabd2a964db3b1af4781d77d372df1d00e9f54b9b3523744f2278c4fe13. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWV2351962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa0aa6724d63e5208738dbad79e2dc9a225a52691a62f229f2c5d174d9e8a7f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFZ22369413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddd7dbf9487a60c0185cae40ccfa2a2c1faf00322225062160d2896b5929e4e. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/IEWNQ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50355d1851cb0263453aed61efe447357537eac85aaa528095add62b3f04fd04. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IEWNQ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ddca4dbd3e5fb88e12dd89a0326aa46da014cceaf512dc3746db7884ac7bd3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IEWNQ2310050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8213860d8a6ace328f300a0f77a85037b62f7e6eb339735478c00a24660ab79f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IEWNQ2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a4097083cfe13d57ead77491b7dfdb16001eb218c3ef8697c89e8f42cd202f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IEWQN2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89995289ccfdf22701cacefc4eff02aa86cfe3c514ca6fefce8a2df86f043523. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/IEWNQ2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb304d70296b60a921c3bd18e956883ff6f072a45671933236fddc463cbd5037. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/IEWNQ2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f3ba03e10a8ca0e4e98e392c207863f6ba531a527f1765fcadbfbe92cee6e9. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/IEWNQ2500015.