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 0x56ae5bb56def9fcda51d416251e3dd2a3444d32512d2a98bf788c8f4f8cde17c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4cccdf0-da9b-46df-b9ef-f04108ee80e1.json and https://artists.proofprofile.net/proofs/artist/c4cccdf0-da9b-46df-b9ef-f04108ee80e1.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 0x8da9611bdfdd85db60396023bec89f1be0e9a8b8cb781b68bd3f8a6dd02912ce. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITM161704965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540e0a0d0f7b8c70e58de4b52a9bb337ab393c6c662b1a0ad58532246d98a96c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITM161704972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d20a3c9ea08d919cd90209488c160771ee08b93836ec498f383026e2190734b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:50Z), 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/ITM161704974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a4b825c84f98a505bdde1e7ff164427a4204a0da8b1aee1c6b5ef90e45f538. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITM161704976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f801127f3ee16b9d16d0b3eb4f9f9666f3a488c17d177ef0a81b5e16ccf344d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ITM161704979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa184984a47634dc85fd5946248afbb564cb6c764ca118b224722a38afe9bce02. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/ITM161704983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71985adc7d9923873bc4e98e65211f710d1328d8f865dae0831d04028f163156. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITM161704985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c129471f8e01e946a5f39e499e631bae9c59572eac04c729e6848b50755ac7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITM162007031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859ac6944ed13e96460a5bf80bc060e1afa30747718555c44ac0d79fe32da730. 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/ITM162007036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aed7de76aa58b2c3817f235a92ca84f416ce68f898face4eeca16717c6a1c5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ITM162007049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa293548fbc1679f863d7ac83a470d0de3ba3fc94c9e06c1538218e9086b29317. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ITM162007051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4307a14a5fde80ef597fcb97bd2aba06dac2b487dd22114517790ab79711d5bf. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/ITM162007055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b55bb33294af472a70097da1a6f0e65926c62e979fe6f3cbe98683e74ef07af. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ITM162007059.
Non siamo sufi (Composizioni per poesie mistiche persiane)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425092aa2a25729aad477591246963af15d620e9f89c4138ed16686bf3d1b6ba. 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/ITF702520507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dfa394c84d82fa1e14424a9f300ae6bc63872761272f91beeafacf0a80b3b8. 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/ITF702520509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c0ed53be58fe72c91548b55a9c26a5f41a07a32d9bbbc652675f8bb951033c. 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/ITF702520503.
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