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 0xe09abe58aed82d123edf2dfce10e3fc70c636d661f944ff593f31ee3efe58b12. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43822207-18b1-4b3d-9f9c-424b175403eb.json and https://artists.proofprofile.net/proofs/artist/43822207-18b1-4b3d-9f9c-424b175403eb.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 0x3345296e66cbaef044de46b2f75074c825f249dacea8f4c82bee4b7fd00e3ecb. 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/ITO4J2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b46f22f4912f247821e9784d75b2f1d7b41df8f5b1b3e7e725b5d9ad683b0c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITK192100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde44e8b52fcd0dc6425625b13167be4087c1ec1c78ce2ffa944683dad690e4d. 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/ITRXS2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd93fa3b56d032407fa92970c47a26e1283406bf0feba9095944bdd920aeb8a4. 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/ITUM72401255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8870f66a4168fa22b1fe05b4f0a9935fcd7ba146a7f9728e49f4bbd23d13808a. 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/ITK192200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9528c326e5c0cc6fc0f4d1306b738d3b32b647ddddc61d3d9d5a53544fdfe6ea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITK192200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62942ebd4648c1abd10818d72296b3ed1f397119ffa679aca7dbfa6a05ef8db5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITK192200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb559a592c1cdbd3d8f7b80ed8073ac5155d7172ca63642958da71bb8ca6ccf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITK192200213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b0555547fe4f8aa1554e6f9b11b7c1976141b9b098ea2f593b233bf07826f7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITK192200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771571746521f6162c6cc28609b5706449e8a6945ed8deaebc852e1c0f4cef2f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITK192200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe62441b76b8754f675dc141706a261fc67f816c6bdd1a1419e05bfeb946ab0. 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/ITK192200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e25b3bd54b44cded48bd8afe30d05462e9e39df54b5e9b968c25c157eb02bf5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITK192200135.
Inchiostro sulla face (feat. MamboLosco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b930cc5c8e3da0950155424c79bc0ce516e4c582a152c45d637dfd315cdb92d. 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/ITK192200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc33426219cac29e13d00feffa566904ea1195ac4dfee520b8d050d5035b6bc. 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/ITK192200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb939e9d9e1aa98e05e26ee2e224d237ace69f2f6cdfffed69f99b33b7fbbfe5c. 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/ITK192200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd703e1eeebbcca7176c24f453d80382eb7d8b9ae566ef9954100ffafe5c01f9d. 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/ITK192200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e74f4e08d46423ffcaece774b91ba8d2218e7c5686538b7c0b520cca6a86d88. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITK192200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce5ebd14193b0caffd80cc96117f783e0ef4d225113933f63785c7fc52d2f7c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITK192200141.