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 0xb82805d523fca67c9289d4aaf3cd59b985fef87fe739af84c0f93e68320e3263. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73f71d52-aebc-44da-af59-df66e166899f.json and https://artists.proofprofile.net/proofs/artist/73f71d52-aebc-44da-af59-df66e166899f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Requiem In C Major: XIV. Offertorium, Domine Jes
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 0x47e8b7ebdb057ce5dd8c412d09e98f47ee98c9de1c7616c0b10f4ac12a1a29e3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ130809140.
Requiem In C Major: III. Introitus, Exaudi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376975c8ece6222482647a5b3d68282c5e57d423a0fce229cd4d7f3428df3f70. 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/FRZ130809030.
Requiem In C Major: XVII. Benedictus, benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b600f268a66e11a56c938e3071fac8c91d1736a9ea9c1e87fd50e56bf490da2. 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/FRZ130809170.
Requiem In C Major: XIX. Agus Dei, Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299de1f56811bd6e924738de184988c43c2c113630addb2b19a3cfa26a73e38b. 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/FRZ130809190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b43efa0c46fdab3a39cc6abef1b9800b43d8610842d90cb7789ee524eb5737. 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/FRZ130809280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0e99ab7114c62f1bdd52b0b335b5b94db19cc7a8f111071b45adf529af8a9b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR6V80814830.
Dixit Dominus, RV 595: Donec ponam inimicos tuos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2895e6287dd3f2559842719c4b579b0b72fae7bb8d6d4b94322e2ee09d1f3042. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6V80814831.
Dixit Dominus, RV 595: Virgam virtutis tuae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbece4468662616ff6f96e2b243534ae6d2f462e6096731fcbe6a1851fd3a9f9e. 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/FR6V80814832.
Dixit Dominus, RV 595: Judicabit in nationibus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c400f3f386f82643fe5dbb9b361b2d92ad1c463a7393c893a9811ad7e64bd4e. 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/FR6V80814836.
Dixit Dominus, RV 595: De torrente in via bibet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60df79f36f2a54b68512b6083cec8e611710167a4b9f037e9611efc7f9aefc8. 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/FR6V80814837.
Requiem In C Major: VI. Sequentia, Dies irae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0dbfc5406d42d605b00643a6946d6877e76279ca97a6821ce1c998ec993ae. 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/FRZ130809060.
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 C Major: VIII. Sequentia, Mors stupebit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea210df40d5bc584ddbcf7737c47faa509a1c9169dfb39412549b75899292f0. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FRZ130809080.
Requiem In C Major: XIII. Sequentia, Lacrimosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9864015a10d6a28cca77eecdfdb5b22e7b8b9f64c9586d134c3e371e3bcc81. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRZ130809130.
Requiem In C Major: XV. Offertorium, Hostias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3051fcefd19a422c3c28b70cca6f73e8b1f8418d1f795a8ca508f92bc4ca939. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRZ130809150.
Requiem In C Major: IX. Sequentia, Recordare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0015c2ba82db9a504f7a5aed5f8055cf1c6d091c0844ac00087e99b7a307b3. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRZ130809090.
Requiem In C Major: XII. Sequentia, Inter oves locum praesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa543aa41cf7ab29171685c71feb38b81965c674c72d760c68cf9a551a349e550. 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/FRZ130809120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5713f1d85d62c94a2435b2c0b2513a4ca504021ad7b33afa964d0a61243729ca. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FRZ130809250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220de840ee09a33f53c84163873e834ed5ac316056f400fe7d02b4bdd23e16d1. 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/FR6V80814833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd7737fed120cee019799b00a4a02547ae66c0abad10da0cc4432a5ef508442. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR6V80814834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5ce7cff6a989ee6a863e201f20e58749ad8c2fbc8404b43795093eeadeda20. 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/FR6V80814838.