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 0x96aa6d814e6031c2b258ceedae008ad338b856169c4030994ac940ecc0ed3349. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fb4bc6c-ad12-4b7f-b66b-543421b50b7f.json and https://artists.proofprofile.net/proofs/artist/5fb4bc6c-ad12-4b7f-b66b-543421b50b7f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Messa da Requiem (2004 Digital Remaster): I. Requiem
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 0x8038037a705922eb35bf9ddcec54b3564772c0e32f678d85055dd00dfb195d80. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBAYC0401563.
Messa da Requiem (2004 Digital Remaster), II. Dies Irae : Dies irae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1edb1a0a651bbb95a01dc5afb5516a76138e44e878a7a125aa666926b381ee1. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/GBAYC0401565.
Messa da Requiem (2004 Digital Remaster), II. Dies Irae : Tuba mirum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f05b172bf11c0515249996f55c833377f2145e2d6d5fd134276ca229aa999ab. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBAYC0401566.
Messa da Requiem (2004 Digital Remaster), II. Dies Irae : Quid sum miser
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5252f5763793f170892de070bb0e109c62a62e164ea1d321d40d380405c12fc. 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/GBAYC0401568.
Messa da Requiem (2004 Digital Remaster), II. Dies Irae : Rex tremendae majestatis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d838a6fe1ff688fd2b0b7c86ea53f1b74ed0d8be1740c16a2de1f4e8ffe786. 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/GBAYC0401569.
Messa da Requiem (2004 Digital Remaster), II. Dies Irae : Ingemisco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204b6486c371f805492e8b2703764cd1c739033f3068cf25a2f2c03acbf7b7af. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBAYC0401571.
Messa da Requiem (2004 Digital Remaster), VII. Libera me: Dies irae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc855d4f37b65fbaab3a636cb895809e3cea89851b575f4823181fc986ac60bd2. 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/GBAYC0401582.
Messa da Requiem (2004 Digital Remaster), VII. Libera me: Libera me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b074af5e20ff7e6fe94faacc782d41285ebb4f847ca078ee0dee07c0cfed67. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBAYC0401584.