Maddalena Casulana (c. 1544 – c. 1590) was an Italian composer, lutenist and singer of the late Renaissance. She is the first female composer to have had a whole book of her music printed and publish
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 0xe7aa9a0d4494aab81fddc7fd21cf1404c63760d9cb4078fd37fcf3276a3b0ac8. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5be4acc-ac7d-4c68-9a34-8b0ab9bff849.json and https://artists.proofprofile.net/proofs/artist/e5be4acc-ac7d-4c68-9a34-8b0ab9bff849.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x31028397da011310192817ad06f5f57244b0b7c6db9f4a16190a3afef8b3a533. 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/GBEJP2420301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8e3bb7a9523ad1b217882588bf7de3dd91577426bc36e635dcfd07c2fbb5cc. 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/GBEJP2420305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed6eafddc2ad036d76ac1e90d7db38f998abff731a2c66357429cf8850be013. 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/GBEJP2420310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e73771d4f26da6ed4532acd5a4ba229f8ce36b18d3a65160304c8f2021de4f5. 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/GBEJP2420311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6864828a127f16e25f119cbe84dded863a2e2daeb0817a20b5160c9a0bf45387. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/GBEJP2420303.
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
Music for My Love: Celebrating the Life of a Special Woman, Vol. 1
I canti di Euterpe : Composizioni femminili (XVI - XVII secolo)
Vittoria Aleotti : Hor che la vaga aurora
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413b3d87e02aaafff8d70eb60be51c3e970eb414ee1b8d2bba357327587bbc9a. 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/ITK341003702.
Maddalena Casulana : Vagh' amorosi augelli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a68089769ee395fa513586f499a55db104fcab64f1002edcc50f2dbe0cc573. 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/ITK341003708.
Maddalena Casulana : O notte o ciel o mar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2829763784b401ed509ae884b1e65c189eb73fc90e90794c6128a1123ccc4cd. 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/ITK341003707.
Maddalena Casulana : Morir non può il mio core
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa660a68876fd36c9e7ad27abe0ae9458b666e5656e360a9bba29276eec2f7dac. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ITK341003709.
Sacri concerti: No. 13, Hic accipiet benedictionem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff429c3fdff6ce1da69143f9af9ae3e62ff7000d90b7afcac525bf8f27e38f9. 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/US8272400533.
Il Secondo Libro de Madrigali a Quattro Voci (Maddalena Casulana, Renaissance for Steel Guitar)
Maddalena Casulana: Madrigali (Arr. for Guitar)
Sacred Vocal Music from Wolfenbüttel (Verklingend und ewig)
Animals in Renaissance Music (Inspired by "The Bestiario" by Leonardo Da Vinci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07210da3009cc50325cb51f5973c0ab33bde2b2d1840113f7f8e6231ce71be05. 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/ITK791225501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3fd19e64a8d100c1f9ad914d986374fda53ebb4d70cdee0df690527740ecd4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITK791225502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3509b757a0574b0c9f2f33bfe01a36e909345eb6ca88a9b10555a2851a5876dc. 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/ITK791225503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332d1f51ab46825155569a6ef4e1bb8899e92816082f34f753a209138b533896. 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/ITK791225505.
The Cat, the Weasel and the Mouse - Lute Only
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6d7f66f50742e968aefeae29cf762c09f09f4f3fb1ec5017bab4b7b8143d7c. 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/ITK791225508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339870a17a91b71ad8243e2a90b022f64c54d05c3f6408d6cf81b364c676194e. 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/ITK791225511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168514d68c2d5accf69356b4b363f4bdbffb8e6bd33585aed7175bad357b8ab1. 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/GBAYC9101369.
Sweet honey sucking Bees: a. (The first Part)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ceb95af44f4cf45f1f88dbad0054916f5ba21ffd20f4e303522656610ff190. 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/GBAYC8701793.
Wilbye: The Second Set of Madrigals: No. 17, Sweet Honey Sucking Bees: Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590a42b9e092cacf9fb4a60ef53389baffcb070e4c704b9815ccc92bb6418c41. 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/GBAYC8701794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cf9b47a92248f5c81cba5902d25348a350e22339db583e02c18b95a515b718. 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/GBAYC8701804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ea21cc372d48b79f2b7004cfea96f8d4055dce37a7700aa11dd034281fc7e0. 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/GBAYC9101391.
O Care thou wilt dispatch mee: b. (The second Part)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad766f267ad7d9496a16e5f39f85569096c86bb5d31bcf2c8d983bcf5a27e12. 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/GBAYC8701807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6bdd91eb93ab4622566502b973826546a7a91611a1cba418937516d43d9083. 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/GBAYC9101395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7e11e7d00552ee07c04cb6fb852ea22dba2f05ac0a9ef3506bcf0114ef8a49. 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/GBAYC8701810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82061467ce6f811fa480c5ae7eaffa4e1b8089453dc5286075763302b241e9fd. 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/GBAYC9101401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0bbf1a2dd9adfd69a2a735c67f210fe40aa450004e804bd53b1f8f0c4f6abd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBAYC9101407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2174ab4ec77cc3518dcd42c672a6cf6ea6911163cd32759b81d3904e665486. 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/USHM82246327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a7dacf2fa508097a26d221e81d3cbe0262ca378aad74fef5a9c3d67f8d1b47. 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/USHM82246333.