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 0xb6c47e1a105e886029c9855383a5b3399cf5ae0fa480be6aa5bd8ea432bdbca7. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aff6348d-dbcf-45f9-99a9-c9d3ddbac7b3.json and https://artists.proofprofile.net/proofs/artist/aff6348d-dbcf-45f9-99a9-c9d3ddbac7b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Missa in labore requies à 24 - Gloria: Quoniam tu solus sanctus
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 0x8bcea0574f5d444d479e298113349ead68f992953fe7be0dd9eca889628f02d0. 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/DEE219753910.
Missa in labore requies à 24 - Sanctus: Hosanna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42f3a0675711e75347a4c6b3f7e27a8cd93630c55afd08488759e3d3bc25d03. 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/DEE219753920.
Missa in labore requies à 24 - Kyrie: Sonata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07133e294be7d306c4a8297c34d3a5371e56882424c72e3b31bd6ecd52dc3694. 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/DEE219753901.
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
Missa in labore requies à 24 - Kyrie: Kyrie I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e966e9681fb8665513de07d36019b78f5a693a847183e75e4c10f8f0a8ce551. 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/DEE219753902.
Missa in labore requies à 24 - Kyrie: Kyrie II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb73c7254b31c0bd8a9dcaa64e04c2bf3042a90660f3258abde0a9d49899491. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEE219753904.
Missa in labore requies à 24 - Gloria: Et in terra pax
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601e6a127d8961b449fe15ce5031070791dae03883ad615d8799aca9ef9aef62. 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/DEE219753905.
Missa in labore requies à 24 - Gloria: Gratias agimus tibi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa01fda11381a9d270e53a10222ebda43fd433b5c25be3371971ab629c10e27. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEE219753907.
Missa in labore requies à 24 - Credo: Patrem omnipotentem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3dcbca85982cd7e652375ce649a3d1291a5a2822dc3d7920d658bcf22daf89. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEE219753912.
Missa in labore requies à 24 - Credo: Et in unum Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db9f41148c241b9da3475b4cf20a212bbe317e5665507ace343c7e232411ec8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEE219753913.
Missa in labore requies à 24 - Credo: Crucifixus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2094ad8addafa14e479c45b7ba8219275904848cf9f79a471b85239476e6b475. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEE219753916.
Missa in labore requies à 24 - Sanctus: Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffa80a98f659f9acf6c4465fd04b74dd4b6abb986c5d6dd370f1a4b2cb74ff9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEE219753919.
Missa in labore requies à 24 - Benedictus: Hosanna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe623b48f86020489fbdbcdc6014ef1a43201414515110b2df77e2842798afed6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEE219753922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d0e596b865bd3aa0b544ea2537ed99019db71d3325c289515867970178282e. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEE219753925.