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 0x8a5de0fa26b334f22e2161159136738bf032dd13d7064803e2a7cf27b2cc4b19. 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/9e02734d-d1db-4e44-b2ba-06a8a66502e5.json and https://artists.proofprofile.net/proofs/artist/9e02734d-d1db-4e44-b2ba-06a8a66502e5.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 0x7e2800291758d2223d4a55f5565079774554e88ac3ebb1aaca5a5dffe3a954ed. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZFYY1912849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82021697690d41a726328aed85985742c871e9ccdbf5d62a386132d60ffdd28f. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHN52017907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0076abc364549f427563907d55f29f1fde82dbdb46f61a75adab91263272344f. 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/QZHNA2023612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e430eb534957c7ea963afa5159c580a6670f1f25fc3c1236b22331d15cdfb88. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX772263121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18abbb2a629dd6376ca0d3fcde9c02ba9321b4ee045c57908c1883471638021. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZ5FN2376021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2c8723d343dbc45be321a77a0122cac20032ad70f0e3bbe5a970aca48203e4. 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/QZNWW2360860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15b2b6c6a16e91fd3b785ec7a0d30e031d207008eb32a4fad8aaec2e0820deb. 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/QZDA42332790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b852ca6cd18a196248aea7a42b5f6b7319a71dbba59abf8d99e6535e01cdef. 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/QZNWW2360863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50146eeb160d0d9a640f0eefa54d484a049e4c6a1756d5e754d2df76ac3ed8af. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:45:46Z), 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/QZTAY2334104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2a1e0fb2e9e2fb695b6ae511922a6aeb7fbf61e09d2a373e12ee479092e243. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTB82346299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd987bb9cd78f36bb5b1f791840069fc3c588875fdc0496d08c653ac66b378e4d. 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/QZTBC2376093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ac050b0627d7a7ecb394056cfc66de5b2cc93b89f99d7e541aa054b9e1dc1d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFE2390169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3c97dce076fc6fe8be69e1b8301ced44eb5eee70ffd98a11480e3800aa0a7b. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:51Z), 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/QZHNC2429830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f6800e577e9f7e0cd0a8006b78ed142fe0dc3fa48349075aaf9a100fdc4c4f. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHNC2429831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd825f036c8e9e0352fe54df8635aa79f6264d0a7f9f869e15700703da7d43ca3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNC2429832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79b745864080136b2a9359cf1dbfe2027232f6f04b97a815394a983e4cb7791. 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/QZHNC2429833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f19d8fc4727632a8b9ebb3c04396e71a30dda81a451842291a98067d1aad6c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHNC2429842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef02b93842d871aef9fc207131881a818e325a035fbf68908ebe64b83c90197. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMEN2486477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef3a85d6916feb3143ab8107c4f69814e83b3422816583fa3746c8e3290ddce. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTB32445710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdaa256bbb374d251b4cc0b143c2c30a3bce8f9ba8e1649467ddf63c435cf9e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTBA2425055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4af146f09b125b5c948bc32b58fb1d797e28a0ee63cc171b1837c1f47ea46e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFT2465289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4af146f09b125b5c948bc32b58fb1d797e28a0ee63cc171b1837c1f47ea46e. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZWFT2465289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0ceeaefb1c0e1cad522932e6a14a9e30ae39f2a612b8af4df66ee1f41dcfec. 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/QZWFU2450448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f595e01c63847f073824095e519f0abd36189f506807f43528823e62dcb205. 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/QZWFU2450449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef02b93842d871aef9fc207131881a818e325a035fbf68908ebe64b83c90197. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:44:02Z), 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/QZMEN2486477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef3a85d6916feb3143ab8107c4f69814e83b3422816583fa3746c8e3290ddce. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTB32445710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cab95756db97d96c69362a896406917eb9914b267cec21d4df2df3557a5de0. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZWFU2450450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c066ab3c9778f18f6d4276481c206fb56d3405104fc2287b7622abb8601ede. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFU2450451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae001cdc5d98dbd9955f1dc13cf1d8ab2bd3bb4f2769ff5c749ee418114f87fd. 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/QZWFU2450452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa74748d4ce3747dde9ba0f391b6f9c4cf583079af1c6603f5f1e0a87d7c043. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZWFU2450453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf6c040ec5a85ded2b55d1c849b38949bb4e24390670c37b444c3406defff7a. 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/QZWFU2450454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc91326f8480b5270868ae6329fbcdef48da653e540c673111284ab94b4f5b68. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFU2450455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8411164deb7054f0f826fa5e7ff3061bd2692f197fe99c5173609306c0d0542. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZWFU2450456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7532ce619cdf9f887c1a84dcfff2b1d83b7da8ac93ce598b4bbcbf8fb57366a0. 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/QZWFU2450457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5c753d3aa0e03a8039a49b29558ae897f5c8b9e123e6efef47f1a691431e40. 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/QZWFU2450458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499a93ead6266d556ab7cb7b3c55b3e2f60a3345b7ee703cfd7fbf5fb0f1c0dd. 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/QZWFU2450459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4f843ed74570936e43e7e953da5f9c76254847b0f9f2565d8d9f2c74faf452. 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/QZDA42349294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293a220c054363b8e5e34c28be7a05117439a635a7947cea708ddf9431939def. 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/QZDA62032972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82127af4cf80464a1f9163ea9a2d331268b4f90099bac5ceaab35b9d73e33c8. 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/CA5KR2406037.