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 0xceae0218238fd97aa35946d2028e4168b689f66a6bc001bda308f3b4ed4c935b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd46d752-0093-41e8-9eb1-91390c009da0.json and https://artists.proofprofile.net/proofs/artist/cd46d752-0093-41e8-9eb1-91390c009da0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Pasión Mortal: Songs from Two Golden Ages
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 0xa2d554c8a91ba4849d67813856136ab92ae88e6c7ace94dcb3ff188aac92be9e. 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/GBASH2474601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28469c13b19844b375a90201d69e92ce32a577128bea227b37b205736c9af016. 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/GBASH2474602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc6f9b79f0a1b784a9d8e027ac20f4ca75de55204cdb19c8596eaa5acca8c5a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBASH2474608.
The Fairy Queen, Z. 629: Prelude; If Love’s a Sweet Passion; Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc2bf82e383f4ac7c7d5eb6ba45a3dfecd45ff88d81694e9e8a3c42e0438846. 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/GBASH2474611.
6 Ayres for Four Voices: No. 2, Can She excuse My Wrongs?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f1fb7de895123b78d305c673cf6b2358b374d1882a6f9c38922eca1c59bbcd. 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/GBASH2371101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a981fc4c4ddeb20eeeffc9f3e6635c49abcf31f985f3b7587406a1ea7233a6. 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/GBASH2371102.
The Second Book of Songes: No. 1, I Saw My Lady Weep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de4a66d309acf0b62a8b30f3b5b455747b89cf6121e8041483cc2abec1f7d32. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/GBASH2371103.
The Second Book of Songes: No. 2, Flow, My Tears
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8aed859bf05078733189c98c524dec9bbb91e6cb9c9c858f3644dc63e4031e8. 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/GBASH2371104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939bf1dd89283813dffa32e76c97613a5069adeff5041515ca8ed7f260a4884e. 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/GBASH2371117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb514adf1979d45ddf36051fef0e581b48662bebef1f9d16f542ec5172c30b. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/GBASH2371119.
Bonduca, Z. 574: O lead me to some peaceful gloom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76726a97f1a6402528ebb57705f983d407166caa729533b8f615e4d3c844c55. 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/GBEBL2128301.
Cantate, ariette, e duetti, Op. 2: XIV. L’Eraclito amoroso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd730d6ae15d7ec6e5de0b86d73ba9aaa42e146cb136ea92a2b4bc379360a16. 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/GBEBL2128302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aace30f0572bb3fa996a5864c1c45290ac794e964d6c4e1d381370c3cb1109. 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/GBEBL2128303.
Dido and Aeneas, Z. 626: When I am laid in earth (Dido's Lament)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a19ed672a88b9d15265b0e8144bbb35c442fdf9d0a9d81c25b7c4bf56430620. 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/GBEBL2128306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb771f037570c5008581b35dc6cd8f6b7c62e75866f937acb8774685cb6d57977. 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/GBEBL2128315.
Ben qui si mostra il ciel (Arr. for Violin and Lute by Oliver Webber)
Mrs. M. E. Her Funeral Tears for the Death of Her Husband: II. Drop Not, Mine Eyes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc513298993654b704a6c53bc530304bf9201085a4b947e68fd988eab8ba4cdd7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEBL2128314.
Dido and Aeneas, Z. 626: When I Am Laid in Earth (Dido's Lament)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022ecab946afaeccbf04f4df2dc7680694a6dbf530feaa8fc08ed81f52652abf. 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/USHM81842553.
Tarantellas I (Arr. for Recorders and Baroque Guitar by Miriam Nerval)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eac5dcdcf8d53e0e8ba7b043fac6c31dee5dd202af36ff56c652734c8fe7a8c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM81842561.
Tarantella Napoletana (Arr. for Recorders by Miriam Nerval)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af917d0469b9b44b6d562698ae20e879456a2866b4618a0e73ee312255d0608. 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/USHM81842566.
Tarantellas II (Arr. for Recorders, Baroque Guitar and Percussion by Miriam Nerval)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61dd48de2354379d15e8ce4035e0f7fdee3e0a69e33b886070a614421c083ae. 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/USHM81842568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7847ac7c86af028227da246ba3d244addacf2763cf037be9913ab4019a695e63. 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/GBC3S2230803.
The Excellence of Women: Casulana & Strozzi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99db67d9a1137fdc28f0ddd5de171c1009e6137bd801619c12056abccb1dcf7. 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/UKKLL2300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e80733e7221d3a23a1268439b62a5138277ba020eff0b3251bad4f6612b291. 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/UKKLL2300505.