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 0xe9a5a48c8a87bb1a4a2f7ca1087994ad9fa0617c0ea7dd26a824b3169abae60a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2716d82a-3499-43ac-886b-a36409008450.json and https://artists.proofprofile.net/proofs/artist/2716d82a-3499-43ac-886b-a36409008450.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 0x9969aab3d497c2741c750de7b65b5a8db90f166b1747b6c8a91c4dad76a97a1d. 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/ITS042000100.
Smooth Guitar Sessions (Wonderful Tonight)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c068ac0a1e23222c176a63aed015083ba42ca0d9ac85fe5eaac1b3b9a71b44. 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/ITS041800643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094b0cdc389c440acfebe81f6ddc4600b750e8066cf383f8c91d3265f0d6e3a8. 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/ITS041800657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9c2ba4298037291ba3b680eee0a3c61a1be602ffc9835a7a77d3919c4ce7fa. 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/ITS041800652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb5c0b782b61f139c27ea97b427796ca73f70f960259c24bbf8f3a66b244bb9. 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/ITS041800670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1745f8d07bbfa33321835de6e0718ec06425a43ab260db29ae0d71591ce8165. 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/ITS041800660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8223476df216407f17523d31638c85ee454877bbbe19f57ecc6dc27aacf861e. 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/ITS041800666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93516bf22975fc9f07e3c3f1902d4e9ad43725e8f388257091f6581eda66a3de. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ITS041800665.
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 0x09ff20fe57d005415a3c0e5feb76103e4c1f78f4ec9af9f6c72aae582401c18f. 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/ITS041800679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb959110c759c1db0b625d116c719db324ab4f480f6814d4658e6506555e2f05. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ITS041800661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d94e4f03aa1c499979e18beaa8063b2f7f6236aae396fc98577c8698f2f264f. 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/ITS041800673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86617739092b0b1391d9cc5554506434ffde125741fe47c60d6c9a1e08691483. 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/ITS041800648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea5217c5204c0ff4dd6e54eb1b365c5b98ca847dccb1ccb8f7aaccbd4a75f90. 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/ITS041800683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316a309a269e2bfad63bbd9867e264c59d5050ea1ef8099d9e90c5424aafe71a. 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/ITS041800676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe1e4971731c52c3e9dcee4bde8290e5a5c81ce1bbc9315a4f709c7defe29c3. 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/ITS041800674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655b1387489a11fc6ad47b78bc501166b91898cfb3174d61cf3e6252122b9b68. 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/ITS041800671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22050d5224ab6fc0081884ab7890680f60ef21c47da4c3b270fabba6ccd9bb19. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ITS041800653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeadc95e9aa5c4b2323dfb5a31ebc86e6fe95c66ae0ad48ec5de3d5c336bba21. 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/ITS041800646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c59fa7197103c290b484bf8d7df607c1e0a75ce3f0b8da6d7d492c6a1c6a7c. 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/DEB641500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1313d7849a946fd496c2502098b58a84a10c00a075b34f7682d5de2b038ce5a1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITW310510507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26c10ab1fe9693b8b910752ccd9ed1fe757b72d628c9d11d350af9004306626. 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/ITV701615402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f208f801db5d221ae1dd4431dd72ccc9c61b848acf7932325122614cf4fc0e. 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/ITV701615405.
Musicisti per l'accademia italiana del clarinetto
Rigoletto, Fantasia da concerto - Per clarinetto e orchestra da camera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef14c5d3696ea9168d95f39f5e3901d7af37e6ac4512ccfdf9bdda40fb4b1b2b. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/FR96X1749988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb4f208cc3eca424bdd87f368a9ecd5ba4dcc34cbe9de93e003cb73c7025d5a. 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/ITPDM2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac20f7e1f2e5ff002e48f900b58c1f5e91e543d49afbcb14100678009e32910d. 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/ITPDM2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dac399a34427252121147e52017d5c75d94d2917a83c99708a2ca553f84a99. 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/ITPDM2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7256ec891ad668631d98bacaa3d46af88cb95c0c9c36f588a443fbd49e78466c. 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/ITPDM2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f6d5e36049d83f9ad3a7b4be41e4a2571cf3e49e56d69262646730471ce39d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ITPDM2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2685e219b38d3be4cf2adfe62942d836a10fb7c0d864b1f0ac04581d6cd1bdc. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ITPDM2400025.