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 0xcdf190e57d40035a81659baa604854c3380c2721891ee8d3d1c24517ddc52620. 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/a9f26e39-5040-4444-ad22-31d1c2e96992.json and https://artists.proofprofile.net/proofs/artist/a9f26e39-5040-4444-ad22-31d1c2e96992.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 0x13de3f53fb8478100b9a6c87ee0edfa4061befa473d79fd2be0ed3ab0c825142. 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/QZTBB2436266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef289ed9f90dd82b3f4848cc209c0ed2ed8b5126c3a8ff33ed66ecec4885e3af. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTBB2436286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c224585471448f7a23e6260fde0b28fddf6df229a063bfad7061ac89f6f76f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFL2404554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f8653fa6cfbbbacbafd4497fc3399948fddb7a0c3d166f1db2fc5ac30c8ec4. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZWFM2456847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b07da8b70a75baa53d377ff43490727b7ce401c2d87ccd30ec26e57193cd66. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFM2451026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e987925e3e0b3ed0bc172d48cc497e427dfe883a162f848e26bdedcaf464fec. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFV2474769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f44524d0d2218d88328a64474c9bd6d9076846d985f0078c129d829c8d4b01c. 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/QZWFV2474770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c971ad0847d0fa96cdfdb268e2c38ae84ec8353f94c849f2ab3558d1309190. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZWFV2474771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b89888d086f30f400b840daf9adc1387b9aaf15a069783feb46e3786aace0ab. 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/QZWFV2474772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18254866d6b693e6760e55d5d7b2862e0d869b6c5c86da8d68d53091614b362a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFV2474773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceca82a1ad88148321743797dfe552157ee834ee7c608e775015bf4be6d08a4. 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/QZWFV2474774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c253a189cda81c1f1acc24965e5bcd12305fb9cd7d682df810e5088a8ae568. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFV2474775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc465e891498111bd250b12608f13587127ecd5cfb2494de19de4cb9001da38d4. 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/QZWFV2474776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc50aa2aaeb168582ad49be33698da2f04adfd6fa1a74279b48032619922a5e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZWFV2474777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76806e220faea9616aae386828a726217e7b52adb59e00d5728bdfd9b245e73. 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/QZWFV2474778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf675c3683ea4a44e9a069e81c651b858369e5ff481a4c60acd4fc0b5b78665. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZWFV2474779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fd9e26e44de748e7445c7f11e9228903d368b5630749d28d97a8112a2b530f. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZWFV2474780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576902edf8de7caa73087ca861f8923a085082b4ad8f1b200058492183c63951. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZWFV2474781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5b36607c5f9bc794fff6e221a93bdb4352749312ebfba06618dc7918f19c70. 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/QZWFV2474782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4716de10058ee10d1f9d279d93e98648b2d2815215692b26ca95d2e916842b8. 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/QZWFV2474783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419f1cf0fd48a5b5aeb85c9bc1b916100a871acc42554fa67884065f63605973. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZWFV2474784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc23fb22e84dc0d987a72c2dbc37fdf6c74f635dab928f108f511c751056896f. 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/QZWFV2474785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563fc7fb1d9aec83b2ffa019583b5d2110875f436f3281fd212a5c8cf13ddb5c. 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/QZWFV2474786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47885d70b854da3e4906cd0b09bcf1a846c627f2af3e04ecd021f72ab0b664ff. 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/QZWFV2474787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b747b5d2db04be530113f0de6a0d00a734793f0cbd7cde990eef95307d4736. 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/QZWFV2474788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee87bf84f01a566aa3775eddad9b44b5cdda199a393342147db9f2958bb0346. 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/QZWFV2474789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f84ecb7aafce7269bde36b755421b30d3c0433b4aa9afd11fd1db621f434c0. 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/QZWFV2474790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f00b929063479135c701c261f1a49e44a413c41307513c33aae382d70da6e6. 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/QZWFV2474791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3c6b30d505b0ceb6dc0481c414cba08850b06cd000f0448ddf31fb2feb4530. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFV2474792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa930129bf1bd906fa5a7ed0c2a49b844bec4c8e3f32ef50520f99e54037027eb. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QT3EY2433594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab2d197cf140acdabee11c9aeb3c6e391fe16032199a6d1e7a3fdb06679e1c4. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QT3EY2433595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bef877e1282ba075ccd4c3ffddca9562594c6f700a937d432e2fb8d149ee8bc. 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/QT3EY2433596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2700d2740be788f6e7cf5021a5b4b4c6074335fc3c7d06034a38218a8209ef9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QT3EY2433597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8a8a35aa52fe86c4ab628f76f48b76f256068cedb9ce741320e5db21aa51c4. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QT3EY2433598.