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 0x7876444c03b307642e2ef55f87755ec2bb8bae6c8e2ea055021316858552b46f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/489aa6b4-2c77-4e8c-b8cc-988eaadcddd1.json and https://artists.proofprofile.net/proofs/artist/489aa6b4-2c77-4e8c-b8cc-988eaadcddd1.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 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 0x48dfbd1dcda27ef56a1546b6ff531bd2e7264b478c7fe61c55364c3a68cbc56e. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ITY481519005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebd8b39c108b4aef3e4cd13f8d23e195693d4998342683326ac0ac4a86939cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITY481519006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3d5be0551620999ff94ac74116537be04a5053925cd11c1a4a63523b897651. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ITY481519007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11a4de9dc2c7a90b78168c66de0161b28bdf8b004f643441c2028872c9c44dc. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ITY481519011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3435dbdc0afa3f585b96577f68b61dbc0e9fc22496048fb420d9aed4ffc4437. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITP841300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b48c42e32af258cb586ca2f7aab54c09c099a43941cc5f18c3c6e421b938505. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ITP841300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e763f792264a6398edebfdbb7fb9305d996d233da2b3721772f7aeddac9667. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITP841300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5a2ade33875b37c7f76de29e70b2b930c637119c5c4d36dc497a650e068429. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/ITP841300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a378e4a58d873c5b6b427673f571275a3a5b48ca753bbca822c6e28c5666160. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ITP841300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b7a53411ffb99963e0f3c14392f94818fca8516aaca807d24cc6a7a8128ed5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITCV32310702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac9339313171c9e7137f4a806febf31ffe6664750beaaf2e68bfc05c96ef2af. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ITCV32310705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d383d7f56f100c37da10ef1baf96920ee260cfaee117bf358184cd9008a0de2. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ITCV32310706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef02a643c517a0a635ab1b9d24ece444974e9fe0e03f8effd77bc4cc29aa6f3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITCV32310707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3d13918d95412e9c46b849542f04ca01e038e0d056c585a72789a3c41b9e18. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ITCV32310709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccf675777a6bc921db95a3df4e8d8f435ef785b35367fd6d3e83855cbe5043b. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/ITCV32310713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadabc0ef4ad1019f9c07910830b824f257a4a44f44a7cea7f1a19dc65337749. 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/ITHBZ2200020.
Fra la via Aurelia e il West (dedicato a Francesco Guccini)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47c240d91528339fd0dc22309254285cd51130516c691867c226a17f723a0c5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ITOOJ1700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0947fe189bf12eb0efa84f6a2b832a4e32c10a205636d5883c2bb38e804427. 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/ITCV32412309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6c492c7c5de35f5b38a294ceec0aa324521e731ac3f8996308c3b4e27a28d7. 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/ITH502007005.