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 0xf1b0716fde4014c3b65171ea0c75a15c60aacc0e101b5e36cd1757da1cbaa5b2. 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/3ef8eebf-6157-47a7-895d-83434721b374.json and https://artists.proofprofile.net/proofs/artist/3ef8eebf-6157-47a7-895d-83434721b374.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 0x27dd8ee83fe12e4356a63e2eeeeaf4f5b089c17f0a866007ec181559cb76dabc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKBSS2401233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd82f5c667e4f7fe6d971e2e9de359d9c7ae5a04d8f6b7d16b048771f81ca368. 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/BKBSS2500268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53df8222d3222340ed3f290cf900abdad7374d616c6c02e3c94b29bb1c543387. 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/BKBSS2500270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0741895b62afb73131e2b76e37ac27e757a49b12ffcd0dfb4ad2bb2c704de6e6. 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/BKBSS2500249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80037e2150c8861432ddb665e7a738ca005f46b6fbab51428be2fb34c08c3560. 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/BKBSS2500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd63e3fcc5f67951978e49aa7af6fd8fa4f70c0d72d0ed473c1fae2f303f9c79. 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/BKBSS2500269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b74394b0c076b014a2c7cd4e055857768658a60a547869f84f11bc3a23abe68. 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/BKBSS2500225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f443d57a2ca74b590dbdb42b20c33658c6cdabca041b800f3b9a662694bce6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BKBSS2500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3ed5b00943d03a9463536b09e32519564ae3e91fccd24a33d75b0e8d7d0019. 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/BKBSS2500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4083cd770ce3712c4aecdafa13f5cd2fd4a7618b919a3df6097f818ac9d6bc61. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BKBSS2500186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc65fbd6ecc9e5895cd07276a0789d786fad893c8f47a14e4f750fa76ecfaa04. 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/BKBSS2500175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0297926dc50d1c546d5ebd855f94ea43d2a8c695256d45ed8521d3bddfe864d. 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/BKBSS2500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da4b2ac05a9ef20c1e6474fe4abb4973b252443d728e40b34264ec2162b04b3. 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/BKBSS2500160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d706c1f927c6b35406320fd24e21171b6066bbe3810eef62a3f4bea9f843194. 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/BKBSS2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30c6d950bf96b5e7d85de13c1d27c9b9a0537e1a53ce73024aeb15b7c25c81b. 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/BKBSS2401321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648c143233ed97c02ee7dbe3ffcc619adc136da7abc55e16b9988b869eab359b. 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/BKBSS2401303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4b62415ced67ee9d0a006b8a9269bc0e153c5554a3c9280248e118199a193f. 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/BKBSS2401288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb2c5412d42ddad56a8aa4c24c7dc714f47ef8e8527ce6dee299bfd6ec7f9c5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKBSS2401276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcd7e14d033486dddcba4409e47217bc42a2c940218c28e5a274286eaa821f7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKBSS2401193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca848bef54fd6a0f0b95828d7a90858a3687c593a43da666af016eb6aa90a3d2. 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/BKBSS2401185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd43ef76e0ef9702898ce1dc33a4a325863d096e882cbfacfceb8edfece9d0b. 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/BKBSS2401127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbaa7ee8f16f419b28cb8671f6e50937919baba0fc21415e7d7af74c11daf5b. 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/BKBSS2401097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc967cf5386f3aa4c560908745209ce58e8f2b9a0eafc46908189964932ededa. 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/BKBSS2401059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a02459f20acb796d7a2054a5cf2cc37e93dcb21fd3780db3f2d444fa92aa9e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BK4DA2454698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ef112e7e23fbb2c253dc84dcf5c0b6af94e26972a2540920f8b74790ea211e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BK4DA2454706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1de5e73ab8d17b3cb177830c4496f9f3a2ac6c140a35cb125c6a819c58e5759. 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/BKBSS2401014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba07c7940873aaf48b52cb16a8cb1a0dd9d739dac7735b4d450eebddd6aac11e. 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/BKBSS2400705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fcfafe6c23019a74a82ea154b1d261059344c9d2b4b08570e181a6d8af2f7d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKBSS2400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8690e47fca6c00630fb4d457ff2ac401a8da3d1b92b96e76ea6a8a8f9a99b877. 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/BKBSS2400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e1f43677d84ead75dbadb7d3d89516ea57e1e1f09b95e96b5dd8cef08cbe13. 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/BKBSS2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea97ddac492940d1ac9606aea6249612ee9dc397613a4d69e002a2d4ca0048a1. 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/BKBSS2401174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0cf235917b66108ac6c415cea74893f65ac657a6b153fee9d56eedf41333ad. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BKBSS2300266.
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 0x55d1179e7872a1c7018dde26007d9534ef3858bc159225ca2259f84525f63e74. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BKBSS2300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf027920a8460b4f24c236591b5397e376f0c9b7e21d38a627dd97b951aff2e68. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BKBSS2300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1e417a3ab9fad9b1530785e9ea0ce6cac71f7ceccbbf3d47c534e88a9c4c11. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BKBSS2400205.