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 0xed77589dc66eb984dbbb7e8f2f665c767e4690e52ccaf0d8f3e3baa304003c2d. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d57ce7d-9d50-4bef-a2ff-399d78853741.json and https://artists.proofprofile.net/proofs/artist/5d57ce7d-9d50-4bef-a2ff-399d78853741.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Croatia National Anthem Football (Uefa Euro 2012)
Portugal National Anthem Football (Uefa Euro 2012)
Greece National Anthem Football (Uefa Euro 2012)
Czech Republic National Anthem Football (Uefa Euro 2012)
Ukraine National Anthem Football (Uefa Euro 2012)
Germany National Anthem Football (Uefa Euro 2012)
Russia National Anthem Football (Uefa Euro 2012)
United Kingdom National Anthem Football (Uefa Euro 2012)
Spain National Anthem Football (Uefa Euro 2012)
Ireland National Anthem Football (Uefa Euro 2012)
Nehterlands National Anthem Football (Uefa Euro 2012)
Denmark National Anthem Football (Uefa Euro 2012)
Sweden National Anthem Football (Uefa Euro 2012)
Poland National Anthem Football (Uefa Euro 2012)
Italy National Anthem Football (Uefa Euro 2012)
France National Anthem Football (Uefa Euro 2012)
United Kingdom National Anthem (Jubilee)
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 0xb4e44e99e3d084df7f0c2ce3f12cf022ca5e7168cf91d804709bc00164cd5ef7. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/FR6V80120649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd15f8f61a8b9e912affb0de8b1ccdf76e834010a65511cf442a6bf88757ba17. 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/FR6V80110691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e15c47e40454eff34e989ea9823712fbeec3723f2d07c7195a60540afffb023. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR6V80113597.
TH - ราชอาณาจักรไทย - เพลงชาติไทย
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba659fe50da96966ed71ec790378d8f37bf2c0a1afe54ec5b7c993a5aa2efd5a. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ITC471801334.
TH - ประเทศไทย - เพลงสรรเสริญพระบารมี
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc28201330fda0ead23ad86617260faf215926286f21d3b0afdf41ade6a22e9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:15:13Z), 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/ITC471801335.
TL - Timor Lorosa'e - Pátria - Inu Nasionál
TM - Türkmenistan - Garaşsyz, Bitarap Türkmenistanyň Döwlet Gimni (Туркмениста́н - Гарашсыз, Битарап Түркменистаның Дөвлет Гимни)
IS - Ísland - Lofsöngur- Ó, Guð vors Lands - Þjóðsöngur
MC - Principatu de Mu̍negu - A Marcia de Muneghu - Inu Nacionale
CG - Republíki ya Kongó - Ya Kongó - Loyémbo la Lokúmu
CD - Republika ya Kongo ya Dimokalasi - Batɛ́lɛ́mɛ́ Bakongóle - Loyémbo la Lokúmu
PH - Pilipinas - Lupang Hinirang - Pambansang Awit
BO - Wuliwiya - Puliwyap llaqta takin - Llaqta Taki
MP - Sankattan Siha Na Islas Mariånas - Gi Talo Gi Halom Tasi (Commonwealth Téél Falúw kka Efáng llól Marianas -Satil Matawal Pacifico)
MG - Madagasikara - Ry Tanindraza Nay Malala ô - Hiram-pirenena
LU - Lëtzebuerg - Ons Heemecht - Nationalhymn
KE - Kenya - Ee Mungu Nguvu Yetu - Nyimbo ya Taifa
PE - Piruw - Piruwpa llaqta takin - Llaqta Taki
LA - ລາວ - ເພງຊາດລາວ - ເພງຊາດ
EC - Ikwadur - Ikwadurpa llaqta takin - Llaqta Taki
TZ - Jamhuri ya Muungano wa Tanzania - Mungu Ibariki Afrika - Wimbo wa Taifa
MV - Dhivehi Raa'jeyge Jumhooriyya - Gaumee Salaam - Gavmii mi Ekuverikan Matii Tibegen Kuriime Salaam (ދިވެހިރާއްޖޭގެ ޖުމްހޫރިއްޔާ - ޤައުމީ ސަލާމް)
BN - Negara Brunei Darussalam - Allah Peliharakan Sultan - National Anthem (نڬارا بروني دارالسلام‎ - لله فليهاراكن سلطن)
LS - Muso oa Lesotho - Lesotho Fatse la Bo Ntat’a Rona - Pina ea Sechaba (Mmino Feela)
ML - Mali ka Fasojamana - Farafinna n’an faso Mali