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 0xb162f5395919aabddb44630883c000733a6105e39dfb67b3e84be359cf8f0a84. 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/3be255b3-6c6c-4629-8bd3-bd16882b83da.json and https://artists.proofprofile.net/proofs/artist/3be255b3-6c6c-4629-8bd3-bd16882b83da.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 0xa329165f6b6c86abe02d8db910372b73c8f4e78b029e576e6e5056fae1fc719b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US7VG1907937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd58f131d4d197b4d8363116eabf16974aaa255eb839a4d4e8d6691e349b14f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US7VG1983760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c53cc9e0324f1105bce402961e54c12e277a9b4a68e5c20e4675da42bdc09cb. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZHZ31935633.
Músicas Sobre Paz Que Fiz Durante a Guerra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cf0e95a42ff2919eb89f3751289a0ac099b450b0029ff28d77a11e18898346. 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/US7VG2025380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8053e5e5efa8b38d18d854d321aff6aacde9e3683b4ea448704a3a57b10ed9a7. 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/QZNJX2085798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5dc3024c69bbd9e6c90d5211620ff53024af391ce03637b6dd57539f100e8f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZNJX2085799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff21334014bffb61ccc8533cd34d079b73760ba1567f0b85bb65f4dd6b7b1389. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNJX2085800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146e334816baaa3c85835b19ec92a3607987c30e9643bcaa55caddb1f39fd27d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZNJX2085801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975367a8dc2e63dfc43060f52b5dc01bc928a0896ff0dbb083455fb39573a0f0. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZNJX2085805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe943fbbc391a5d0129dcae8eccfe71d45be02f8531edf404c38227e1fff03fc7. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/BCOMF2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f243f035cb875977456ec9ac61cc65d32a89c9ef78dd37b1bb2112e406676b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/BCOMF2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00343d5970f7a8f09a32add9d9f5248095698c2114e57541f42651d32334e60. 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/BCOMF2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a4d2cacda640649b5be8c9b4f88bf85820990ea8e589e8ded8966226285d4f. 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/BCOMF2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97657ee8a712d75999b4bddf131c763b8bffab82a7d178d684a5957159dc204. 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/BCOMF2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314ac50a8988ef9129c3dd77c1380b1cf426409078333b64cc89f9d153c398c2. 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/BCOMF2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7c7d38401c7de9c8fd0d93d53dbd88719af25655a0103b029e4b59c6a6672c. 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/BCOMF2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121640e3163588fc5013cfd10af051bb09ed610876fcfd37863288fd14756510. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/BCOMF2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb514ccc2ea6e31e04a06b7657040eb151bfa8caf17d7ea364596762f1d24298a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/BCOMF2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5972ea07e4b9741fa1701f1e2b604cdef5d919b865a87e903f1c01973a7757. 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/BXE9Q2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89afb57d3d15a4ee2f9baffeea6eded71be875a591b42e92ad93aa7523da9822. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BXE9Q2400010.