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 0xc14abeee3c187d3d5000a83130aca3af8cca26be4d6f451501480a4870f28f57. 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/af421951-b041-4faf-bb57-583e4d08361e.json and https://artists.proofprofile.net/proofs/artist/af421951-b041-4faf-bb57-583e4d08361e.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 0x0f994eab7ce9aa0a00b027c74372ed0e327e71fd9ac7f32c35f22496221d42c5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:36Z), 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/ITM030600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b40afa1c3c7e77869b756aa3d280834b522869c697cbeef7ff8b420b966e44. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ITM030100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce30f9a4dd4934f628c9fd9c2f77c3d63e98c146f848e861d923ab39a075aaa. 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/ITM030100221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c83fba1abfd0c0e72a6fd67132b854acc03119df637085f6846fd59fadf0dd8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:43:29Z), 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/ITM030100233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6ea979dd165596098e7e96506610913d4c276cc4ad9fd5afb70006cc59feb0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ITM030100269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a814f2f4da6474acb15201fa66256f5b2c10709bf777dbd00a080166f75cf45. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ITM030100257.
L'inconfondibile liscio di Castellina Pasi - 23 successi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61006f785286e3f67de37c2dfa09331d133b15c05334ad30fd018e2a382a1d3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:49:22Z), 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/ITM030100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcba918adf76a207a4137b591646b7d872fb2a11303de35e7f703c2702a38383. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ITM030100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa082bc7eb2b216e8c7ed60d2f84799d23db57db5fb2086898b6fc2eee29f0b2b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITM030100242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f73bbda53bacfe53cc75cd297c229e3d7e05dc0be249c37866219f6aa5b4d9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:37Z), 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/ITM031000005.
L'Inconfondibile Liscio Di Castellina-Pasi - 23 Successi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dea89e7dcf40815df356ab8738ccfe9c541994597825c08fe1719a73e5d1ba. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:30:40Z), 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/ITM031600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524ffe0d9a31b8aed2d01d786269b897fc9e477a5b389e58adcb7e341491c28e. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/ITM031600073.
Auguri Maestro Castellina (20 successi live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9051b3461d621ed739e79a145ef6346fb8e5d37162b65586807d4e9167bb477. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ITM030300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058ad20019ec802524d42a9b76293d022775919cdc90559ad849a2837f6ce1b8. 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/ITM030300072.
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