thumb|Map of Rome in the time of the Roman Republic. The pomerium at that time is marked in pink; the Capitoline and Aventine are extra pomerium, 'beyond the wall', with their boundaries in yellow. Th
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 0xe240afcbddddc801f2e6d8039a2d13670b1436209997aa826e25029b889958f8. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a0b65cb-9967-4414-b929-a5cd8f1856ef.json and https://artists.proofprofile.net/proofs/artist/5a0b65cb-9967-4414-b929-a5cd8f1856ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The History Of Classical Music - Part 1 - From Gregorian Chant To C.P.E. Bach
Léonin / Pérotin: Magnus Liber / Feast of St. Stephen: Etenim sederunt principes (à 1) (Introit)
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 0x5913ba8fb14caaa7decf3eff20ecf776a07bcf9614bfd5e1976070ab2e6d702d. 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/DEF059631808.
Dorian Sampler, Vol. 6 (A Dorian Banquet)
Estancia Suite, Op. 8a: IV. Malambo: Allegro - Tempo di malambo
Simón Bolívar Symphony Orchestra Of Venezuela
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead40d6308a6613c5d0a3a63654169f5f5a3b6f6138c495ff61f427c29dc0d9a. 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/USKC60710220.
Advent und Weihnachten – Zum Entspannen und Genießen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b2de8538f44bed6e5127c775c7fa54244b7d4b91384f377878a1f89d93319c. 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/USCGH1597801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acbb8c446c993b14ba207d237aef1e7e71a6fef83d6dc5a65aab1efd1010635. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USCGH1597795.
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 0xc49c468b8d96936fdafe74d3e6cf83ca0c078938cf11c1894fc5c9073f18c09d. 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/DEF059731004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097c38610caebe9c51c9cdc46793f52bc7688dccd5994fc6f1d8b887ba7a8b95. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF059731007.
Inviolata, integra, et casta es Maria à 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29fee4a3f87cdaf292f264fd5d2b18e31c7179f086fffdeb2b80869f46adfef. 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/DEF059731006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454e44b4349ed71fdd297ad4f0a93568741e8dccf1eb922fe058de986a3259d4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEF059504340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90beec2cb9a4e582501d49556db80ce492767f9d23cddb0147b36484b92c38be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF059602870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82952266730409a4d6536fd9597a771b0472b496f7481457045decff09b1e006. 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/DEF059602880.
Hymn: Gaude redempta plebsque celicola festa Marie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1951b6e99647b6adf22c73437806d25ef4a8a0da3ec99fbb1cafc78d35bbb9. 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/DEF059504430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fcfbab67e38050fd79824f31965c95d8ad792dd12f6ffcd68f4b2a473eeb27. 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/DEF059504460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eec9a40a1d550b3c891fe0035029ae1501615a47949490deb4de0c7f79dec4d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEF059503820.
Heavenly Voices - Geistliche Chormusik (Classical Choice)
In the bleak midwinter - Winter Classics
In the Bleak Midwinter - Arr. by Mack Wilberg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eb72450a60bf49c11d403c1199115b4231ef2b42abb03aae3119b1ce659b4b. 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/DEN961001550.
Ave Maria, "Ellens Gesang III", D839 - Excerpt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecd6229d3aa72ede1f21e84308dd6fff390b93b686597aa697edc2909c8bb7c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEF057602883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb19aa69590d2159ffaa8ca68ef179b2d4446e5785e99c412655c22e8bd208c4. 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/DEN960533113.
In The Bleak Midwinter (Arr. Amy Crankshaw for Solo Cello and Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bd1bc6561cbf7f84cdb1427d1ff89c78e9a9c582aa6313b6e460d422925532. 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/DEN962302460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfce04f5985e8c16ea09c54d30ced61b6df980a70c4fd2205cee32891c8cb1b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN960701310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392e00411de2f82821719a0e09ae3b855a48776b5e71cad307f69fc2df5eca4b. 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/GBF077630601.