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 0xa4f9e9604801d13e9c87c7428991b7d2596d9ba7f53be65924d24819578d9cf6. 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/b5398cfa-2a75-403e-93c0-e919019adcc6.json and https://artists.proofprofile.net/proofs/artist/b5398cfa-2a75-403e-93c0-e919019adcc6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O Purp adda cocere inta ll'acqua soja (The Tall Guy RMX 2022)
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 0x07b3b7bac5f5bb8bf735c034f8eb6aaa13c94fd8f39353eeddd08ca5c00f85a1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:04:32Z), 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/IT9KL2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bde4448895f33bd8255d3467fd45696622d21d5fb641c29677f83bc0e646c16. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/IT9KL2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487a0d9c56689122cccac0ac5a3811fcf11aa666d78817931c82d3eac9be361d. 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/FR10S2181302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe53b0fa5f852f18c6c90f8d7be10ee4a79f2e364669ea603e474660ca6ff897. 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/IT7009608700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3937c52b7653f23ffe0b9033d4e19e8e6ed5a4e3d6bca6568faf10a08f4ebb22. 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/IT7009608760.
Neffa E I Messaggeri Della Dopa (Remastered 2021)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90be63e34c0a3f840e3757df9f79e8a596b7117ad5672ea70c69b1934f38ef21. 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/ITUM72100244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14e37b50d82be671ab3599d3257f80a304ed55a0a57404a04045d573154fad5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITL751100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1b106981732de790703df66f3723eaec56d94b8fc6f03e69b6f4d5171a7b57. 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/ITL751100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84adb18421f23ea8c823a190181efa1e45f8f65be296467e05801db1653b7b36. 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/ITL751100173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e8e1aeb0634a669dbe1056f3c9857be3f257b2413423b355a09fef5a1efb37. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ITL751600268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e973c811292b6b39411727c5977e0f56712650def4af6be437019defbe0d780. 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/IT7LD2403466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc519704c6206dfe7a4bd777bb7f11b2bfc4c936c31391cf5cf3aa45de7b0fb9d. 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/ITDY32000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58493baaf26f46202a27d6f0dc20c1d70816158c02be4698ac9f136b69bbe18. 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/ITPI82000007.
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 0xc1bc0b16fd9438cfd7b812eefea2138cb0ae9cf457eeb1dc2bb157682cfea67b. 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/TCAFT2186263.