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 0xc6a43f1d70626bc526aa9f0d3d3b4be812f9364b44d2b2d85222eff4c06174be. 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/172e5f2f-a23f-45ef-b498-813a1aa65980.json and https://artists.proofprofile.net/proofs/artist/172e5f2f-a23f-45ef-b498-813a1aa65980.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 0x3c40a571292cfa7d3bb37b7bc4faba73f32568bcafa5063d089c336b84d222b4. 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/NL9KQ2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8e5f2b2dbfe10a90061ff67b887e12bcdb28214c8ecdd6ce093ab31aa4ac8d. 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/NL5WB2300185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ff28837e772fa4ad0d1b3f1d2a9dd6b26db4284b1f1ce1a9e4b259306f8be0. 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/DEE862302247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06034ff7f64eda1c4f65a0af12e9b950ffdb9364fade14190337a33e33be57fc. 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/NL9KQ2390119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe17777a14635cec044e5e4829d576ea9cac3a52c9a0f259981431dc145d1c7. 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/NL9KQ2390090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0486c1042ae50033b78138744e779899ceee998810e1f11b1997e4d1ebf08e. 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/NL9KQ2390080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ac4f3d6e79fa5311ecdd7f86728149e5d1a87b54a671a53923c33f92497873. 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/NL9KQ2390100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833a83b51df56059b00dff96674fe11f5251870047f7e39e2cbeaf1c7f36f997. 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/NL9KQ2390074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9670a8207071e65c6bd7f2da799d819c599ce0ffe92e5796c4de7491051b6e1e. 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/NL9KQ2390002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6bcfc46be7ad792e2ae632bb6ebb18c8fec37fc8aff3bd8e5b95be41172ca7. 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/NL9KQ2300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f26c6549ba309e7642c8327e5f7b658a03a645fecf1a008573b7e51f132078. 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/NL9KQ2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a5bf0bf3b1c911c39ad4818186339348e7aff4b09bbf00d1b31074bb145d2b. 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/NL9KQ2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cd8364fd965d1972b289907d57c7da1390bc97a7143859a1982548bf7326f9. 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/NL9KQ2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdba13878a0666799ce057ffdfdeaa8751345744526b8e00b0bee72aae09e73. 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/NL9KQ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f0e83af9172e1e56fb05552d34ffb6332f8ec03076c0fa5e6abdfa48e6b48d. 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/NL9KQ2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b48dd743adab23fc1de9588d2127ecb707cb139922d75e6c9491dd725ad3866. 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/NL5WB2300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ad8a3f43feb3b9865eded27eb2e45ce3be8b25c964de2fe9c59507fe21696a. 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/NL5WB2300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac40aa43507303e0899e1bffc80584de836eecd8acc6f61bd7f778892df4212. 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/NL5WB2300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f18fd4b394530574eb33b51ce400ffe0d92e18057ba45c90d04c16ad7dccec. 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/NL5WB2300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1400f2f3b5184a61bac4e4a1531eaabf4f92554dcad851f2124e60f5e4e01f. 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/NL5WB2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d03d376820743cd192aa8242e804a91e8b865dcadcb3870ba47f925d3123ef2. 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/NL5WB2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60097663f1dd714d33724e11748d0bf1929ae6a6c9456560724a1790484a5d76. 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/NL5WB2300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48956cc83c7dd5af9257db4147b699007debc13ba4fbd6c1339bb0749054c84e. 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/NL5WB2300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4e4bcd19435229014c83119e34e18b400765d0723135f01002ce1872165c35. 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/NL5WB2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542e3dc75a0b211443c4b10d2be73217d554c55700c91e1ec95fb57268e35bf8. 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/NL5WB2300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acc556c41b14de88fafe5dc5d12af8e5394d57423510385086ea7fd37209901. 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/NL5WB2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f503d1a807cbcaae834329b3c8b86ebddf92f6e1f629b74e9118b82c94873b. 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/NL5WB2300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5b5a429a714fe25bd0691f921e07211ad3fd0cb1435d7696ece7eb70f9c704. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL5WB2300037.