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 0x1291a7d6046a004eac22efbd336b6b67dbd0e06adc44094fd357a2c085a018fd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84cc3720-4fd4-45fe-a397-ca97f4cd71ba.json and https://artists.proofprofile.net/proofs/artist/84cc3720-4fd4-45fe-a397-ca97f4cd71ba.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 0x29be6a43e712dee09400c0b7e152ccb08ea6e4a401e17427f2b33bce0597d8bb. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ZAA011600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0527dd007abc4775ec4fbcb955a662f2f73a54b32331b50d51cbdec5ac621582. 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/ZAA019700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59c7c599629e26aceae8dd543f5425ac87076e53d01eccf02c6ee69f2de6cc4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZAA011600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71246551d8adf726e9db9248ceb2493732b301cba011ae28b1466729c122d332. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:05:33Z), 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/ZAA019700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff490c6daaa196db967ee381cdb2ac77f373def701e278dadce0add75a5f114. 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/ZAA019700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3066b466606e04b6a50172b89434ba7afa5aaa29eb633a6cb18a5a4bf42a9347. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/ZA56E1410407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa162429266bdc93598d824e8ec503933be39824a9110eaf3aa66dd82c045bcf9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZA56E1410408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5357c319c00599bc729f33508d72362519e2f61fcdae82a8604735dbd688ae9f. 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/ZA56E1410409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858d4d969f55a94fd54e644544791cdd5d7a3b19ca417fd41c75abb29bde24a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:18:33Z), 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/ZA56E1410410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7248efa7ec9be7132cbbe90de8b09b171d1fc1550243f6d4b5f4bd33eb474ce7. 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/ZA56E1410411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fc0c53f941db4bb3bf892c911dedc2b5120bb39572a631c1029906a463594b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZA56E1410412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eebad212773bcee40fb5b2b7d7c5a0879f43a6c8455f14b7456e0bb7cca64b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USL4Q1895637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb2e2557d8e3971cc6d9558e48e32a92cf3bd3b347c10442b4f11ee1511794e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USL4Q1895638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf513551501d70c862e06098c8ab03f482dbb7c0528a0aab1eea1b6c8210085b5. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/USL4Q1895639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f0b24c7670d4ba35031bc9a2b0eba283bf48a94c6fe172e173bca6b2ff796f. 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/USL4Q1895641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b619a95135720a295277dcfdd9a2aebf29804e5182b3c96a9eb2495712aea73. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:44:51Z), 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/USL4Q1895642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d1bdcc7098983eb4a84064849d21170baeec01ec2b59596e81c3ed864b98fb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:27Z), 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/USL4Q1895644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce79e91590f14a7247752f94788b2af58649bf288d589aee6b7bebd9528cf443. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USL4Q1895645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10440c8bfa79fbee786ea198b36b8a564989e354d070933ed42e77baf34cf4be. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAEB1956017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71186ca9289a1278bdd2a4a6bce12cd1476f7b42caf2e1ac1fb1910b17b315c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAEB1956020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9e7712978b70a281351c7db97499692e4ce9107eef509645b0bbf6fdf4f12c. 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/ZA0742021022.