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 0xd77251ad69e89161cabebe802b0cde848f59a7ecaf2f97ffdf19f32fc6bec9de. 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/3b696034-ffe7-4120-acc6-879348735c31.json and https://artists.proofprofile.net/proofs/artist/3b696034-ffe7-4120-acc6-879348735c31.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 0xad2f9b63a2e8ae38bd2e7ed1b7aab4628b0550739e68a1917ff9069d99db88d5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR96X2195150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5c6d01f4a6b5a1c53639e07e69fce429f18f99ba8105bc82eff3228ebecfd7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMDA62172044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d7c11e14c93e58d9212111a82ae42d0bacb034bd176c481fe0b117f1a899ef. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMDA62172047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ec37b2915ba5dbd17b459b687df737197d9de6607653ca68b495aa5d4af0d8. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QMDA62172052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63e78b69a1f669135e5d3475ce6afa2deec8591620a68093b9fc38a1a64a873. 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/QMDA62172056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7febb5dfa5eb1f559868cfb21d14765701225f869c69164320d691e12dc69a8. 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/QMDA62172063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f012a602aa6c168a1a9685d89d597be63cb47f1755554183e797965039aca1. 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/DGA082262044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb44a559bf6bfc841ac154e1ba746dd31a3d13d53b08a22eaed5b6876e30468e. 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/DGA0P2325670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2349601f43e256a257b6271b4faee697f7d3061a7881aec50d1b93fa2075e0b3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:52:45Z), 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/DGA0P2325671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc59012077f3d1348125af638a5186c71e7b78aa8c4ba1e656520373b687938. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:20:03Z), 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/DGA0P2325674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeb01ec7c7af981478f80662c50f7865d4f8c70e7bfb014548ce28f285afe39. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DGA0P2325675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556000f00cf28658621914ed4894380779554e54ed5b3db02989a25e0422a67c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DGA0P2325676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafe1d646777c446297561a82b2c8fee087283e78694653ea47d4f0ce8a5dfeb. 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/DGA0P2325677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a74af4de9a228b1ab959e568f6464564e52618693646ed8e9f0ac93eae3e47. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DGA0P2325678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb63782a5a866815914ed4a4568a81f45f46cf3b52eff6370d3008fb79c9cfd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA0P2325679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af8a20d52083b211e55a9c4bf617ce8dd9ed7e59cb93c795167ed21a93a91ed. 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/DGA0P2325680.