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 0x038632c42bad49b0e23e5f1105cad956484ead1969d8541622048f2888d1ab20. 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/064f293f-8c99-464a-8325-f34114ccde4c.json and https://artists.proofprofile.net/proofs/artist/064f293f-8c99-464a-8325-f34114ccde4c.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 0x89471a6beeb81b97db8544ccbf84e748823187e30fbabc8cf37e61e98f4b6f32. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ITQ740800132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013766386c51bd11fdca0232b0fd50b60ffdbeea05fec6ca28d2a41f34ee8db5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ITQ740800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7f69b806a27e129e0f6aff02ae276f610fbf298a643e98da0a6270d79f1451. 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/ITQ740800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff011c2217cf488c296d7978603adeacd66157137d53977a85ab3fb203fb9541. 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/ITQ740800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a7863b48fe771e08fe58b04a4373ad2b09c08e3443cbae7a97c9cb546ad430. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ITQ740800121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8a399b94b6e5b4b1434d36682d2e1773144942f7960a0e66a6cc0398551296. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ITQ740800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaebafefe212ebe7cd2d6d301b46272a8f57aa38cc5354fac59d02d76f8d00b. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ITQ740800145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3c48c98b2d7188b2fff03b9a1dfe7ded9109c72da31eeb1823718a29ef350c. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/ITQ740800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44348ca30139df3555f13371d617a470ba2f66b36186171c67e1e06ee7cf2a1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITQ740800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0341c550f7ee06d4728bf91dbf4bd39c2de6b2b99c0350c63ab10628c63e169. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ITQ740802081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa3c29d94bb751569e9700346503af9da39a34156e56083a38780af78b15573. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ITQ740800152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445dcd382370fdbea49e3a937ad0a90057b7f63cc9c4a7dd330336d37b95dade. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/ITQ740800157.
Manuela / Pensami / Se mi lasci non vale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069f3a246df12061f762206576663000fbda491a7c0f4b563f3319dcf3556de4. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FR6V82172885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37d63eef22943cd9e17ad8301969f0db433eb87a97513d9972f5e360677427b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR6V82172887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded17c04838241e09f690e2fc614acc28d641218ebabfebb4fa93b2672f78911. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR6V82185930.