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 0x0b69908c87801401c9f3e01fbc49dc31c82ff78bbb7297513a14bb647e361f06. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b1fc924-48b0-4fd2-9fa9-76841b326348.json and https://artists.proofprofile.net/proofs/artist/2b1fc924-48b0-4fd2-9fa9-76841b326348.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 0x4ae1bf78ca98e025fc541cf77c8b882ab86c37ebe77e67d3ad4bda96867cfe28. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ITDQ79922151.
Requiem in E-Flat Major: Kyrie (Soloists, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e995f199450584aa7ae21c02b3ec239c2775fbd9752c996ae1915fa67f903ac. 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/ITDQ79922152.
Requiem in E-Flat Major: Dona eis requiem (Soloists, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c1c32779b8d75cf44619b366e1ad01d43194478396adb2cfe810d40674b492. 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/ITDQ79932215.
Requiem in E-Flat Major: Libera me Domine (Chorus, Soloists)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d117f1cc8c474e46d66d0a510a8da2e2af48fe592701c3b948f90b217b8aac. 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/ITDQ79952215.
Requiem in E-Flat Major: Dies illa (Contralto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe0b3466913aa2b56b89fd4429e3134411347ca0a1d314c0a6ba79435f40f7b. 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/ITDQ79902215.
Requiem in E-Flat Major: Dies irae (Chorus, Soloists)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e8003748575dc034f5bbd62f83d72864078de8615b05045e87a8843074d3b7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ITDQ79922153.
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
Requiem in E-Flat Major: Salva me (Chorus, Soloists)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb1289da30256c4f775215380c72027cba2ef32706a156c0a7ceb385e1e82fe. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITDQ79922154.
Requiem in E-Flat Major: Oro supplex (Chorus, Soloists)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3662759f3d1f71897afd2c6d25b9f8362938e555b36f69667b8829a46b391f91. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITDQ79922155.
Requiem in E-Flat Major: Pie Jesu (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd25b4f66d6f26d13917ddb4133caadd0607f647c5d7b23dbedf1aca5808be6. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ITDQ79922156.
Requiem in E-Flat Major: Domine Jesus (Chorus, Soloists)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c015aec6cc24422dbb4987f7c77add7e0c1f386eb9b55ed88ac856106c58f62. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITDQ79922157.
Requiem in E-Flat Major: Hostias (Soloists, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78214f161e7ae4d1b9f0ce1c3b411ffc042c4156ca4503b426e4fbcc44503daf. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITDQ79922158.
Requiem in E-Flat Major: Sanctus (Soloists, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a2f6ef9f9dc9ce4b8b79beb4807a2a81839fa03534418c0439992e43f05230. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITDQ79922159.
Requiem in E-Flat Major: Hosanna (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb433e9f6de01bf77c8362ac9e7845673a11875a5cf5138983a67ee3a95ab3f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITDQ79922150.
Requiem in E-Flat Major: Benedictus (Soprano, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b83f827bbf6f5fce0ef47c8754f4fd32bbe6d69389b661ebd1b47bba0a8f4d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITDQ79912215.
Requiem in E-Flat Major: Agnus dei (Chorus, Soloists)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448db7dbf62ed9528604485707954099b504ce3bd42f8ada449d1e2265901eb9. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITDQ79922215.
Requiem in E-Flat Major: Lux aeterna (Chorus, Soloists)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac97a955f74b067c7e3d585f27fe82774d32138f6428b20a44a5d56b3ab40b9. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITDQ79942215.
Requiem in E-Flat Major: Quando coeli (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0be3d99554158161c700988e7af833aef1935f33ab39ad303b91157133c3e0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ITDQ79962215.
Requiem in E-Flat Major: Dum veneris (Soloists, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933b5308e9166a2fb7fbccc85796b31ce83e10c6c0127b3a316d3d9060cb6024. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/ITDQ79972215.
Requiem in E-Flat Major: Quando coeli (Chorus, Contralto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d0c4a079ad44cd45c7aef381e91ff812b21efd8abd955af6c5460c03bfccf0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITDQ79992215.