Marco Ambrosini (born 1964) is an Italian musician, composer and arranger living in Germany. In 1982, he founded the international ensemble, Oni Wytars, together with Peter Rabanser. Studies Ambro
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 0x8a637e40d895bf5d9f541170d0e718b57d5f3633ae365de37f5068c61c5d8e67. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f44d980-9f76-4f0e-aec3-453999c6d79f.json and https://artists.proofprofile.net/proofs/artist/6f44d980-9f76-4f0e-aec3-453999c6d79f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kreek: From Heaven Above to Earth I Come
Cyrillus Kreek - The Suspended Harp of Babel
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 0x013ae7f988c37b0f6fdfac19e910f14ad11b8e1656af861cad4b7370b021ed48. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB331862002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bec6e8e4b6d5c3f286ab8798ef9fac44203ee510aa58f4f4217d52ddee311d. 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/DEB331862006.
O Jesus, Thy Pain / Dame, vostre doulz viaire (Arr. Ambrosini and Eller)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559f04333d294d3f47937698c61ddc32d5698fdc31038ecad38f988da9fea382. 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/DEB331862013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013ae7f988c37b0f6fdfac19e910f14ad11b8e1656af861cad4b7370b021ed48. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DEB331862002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456d47ea9db6366bfd51b37ebca309ca22ef9da952dfe48a0295afc44a8922d7. 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/DEB331022601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fee3e9923266ced38631773354b8379fc1bc9d910f7ef56d72e28ebd7a2cf8. 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/DEB331022602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edc9ba01945b8c4e26104dcca6a2c14bc2f4a122fc7a31262fff776c732656a. 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/DEB331022606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ab4c35553c6e1c0a53d35a48c6398102e4b12b4072704a3f68e63a9eed4c3e. 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/DEB331022608.
Jacob's Dream / Orthodox Vespers: Proemial Psalm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5817082e8574052660604524d1ac1f7347ce507497ff6b62d58f4093ca5956. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEB331862003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d5557010c9e979534fae1f2a924fe53db1d6a26711480f44155bd31e970e42. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEB331862004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc4b1490d5f5827edf877e593f1f60b7dd5c318376453dd91241a952fc2487c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEB331862008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c6b82523231691d72855f0fa348e873f0092c4a62a6e3af3e61c2ca7116c9f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEB331862010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a4d0c70b9482ea0fefd876fcf27ecceb57a72b592e17af29f3b074e020b271. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEB331862012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542034699413857f205e92a0b3c37e4fb1c8634d031d90cb043332f2e1e82c14. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEB331022604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2642ca95fa3ea789290754331901297b7156332f0ea652c41bb8c4be4e0eb59. 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/DEB331022607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949aa5bf1d8a59e2b5f4452e42d3e5ee56333d747dd5c40858655bbef814e426. 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/DEB331022611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab4f85171ca78eeb8f53d89a85d1bd98a6f6e2e95d6b458a4f5cf6da918b056. 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/DEE471300005.