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 0x962e170ea38ad2d48b4a5bc12c4540e2bf9a4948ad31fa766ad06cf26ad1d09e. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abbb1e12-3fb5-4ae3-93c5-844dcfc5a5d3.json and https://artists.proofprofile.net/proofs/artist/abbb1e12-3fb5-4ae3-93c5-844dcfc5a5d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Miserere II in C minor: 1. Miserere mei, Deus
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 0x307cb810ff0d292171978708cde9515f1f45734ce40d4f687518369e0829253f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBF077941501.
Miserere II in C minor: 2. Et secundum multitudinem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd33a6344d3b8859c1ca7268cb26e804fc5bd91bcca89121a59cf2d674daccd. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBF077941502.
Miserere II in C minor: 3. Tibi soli peccavi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99e9581c9f32821c662d7456e4cea56dcd0750e2567ff1b698450721536b358. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GBF077941503.
Miserere II in C minor: 4. Ecce enim in inquitatibus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe646a84b261906a7787f33a49c288f4818617cf32de386127108bdb39349c163. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBF077941504.
Miserere II in C minor: 5. Ecce enim veritatem dilexisti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bff14e29acdb0c8c2db3f25ae4a0926b210e79fb6144365121bb7e59f30429. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBF077941505.
Miserere II in C minor: 6. Apserges me hyssopo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5568458f9fd800a3846aef59b0a4a493d2cdcaaebe7b0d7f89eeab37a334a069. 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/GBF077941506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dcab0827c6f17e5d7d012df6924e66c87ce12fb0599dabf88f941372b33e2a. 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/GBF077941507.
Miserere II in C minor: 8. Averte faciem tuam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f36f83499073fe76184273a7860aed3691bc6c98c585cfb678bd2ac4203c2d. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBF077941508.
Miserere II in C minor: 9. Cor mundum crea in me, Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecab8c6bce156c7a02b835a0c02a5bf3b704c16574accbc17c2dee57343dae3c. 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/GBF077941509.
Miserere II in C minor: 10. Ne projicias me a facie tua
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f7265c1075549d13223fde6159f8529aa8ab845dea9b0a24714c81e8d729ee. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBF077941510.
Miserere II in C minor: 11. Domine labia mea aperies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda840a60fac895a4dbd4e8fe87391bb8c057f84edbc8fea7cdc05c247c070867. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBF077941511.
Miserere II in C minor: 12. Quoniam si voluisses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce612986776fe2c40a19edc8e687de642b7a6320f2cf36ca359f25376c573e4. 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/GBF077941512.
Miserere II in C minor: 13. Sacrificium Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a5d51e3a87f4cff6cb3f4aa9d4d18b7ce06da054f4a3b414ae7949d2a26641. 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/GBF077941513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01ee031458f4c44b6dc8d89515b4642e73e00d8d35d4f414eb5f664dff25854. 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/GBF077941514.
Miserere II in C minor: 15. Deo Tunc acceptabis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaf269a568c5c60371cefa97531e26b7a97e23aede79d882afd09ad6baf8fae. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GBF077941515.