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 0x1d0d201d52f3fe05fc9174a303ba5f7802f5a488c52710598002ce4535551b5a. 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/39fa68d1-76f1-4ade-aa8b-ddd896f7d5e8.json and https://artists.proofprofile.net/proofs/artist/39fa68d1-76f1-4ade-aa8b-ddd896f7d5e8.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 0xda53492649746aaf4dccf8c99a3367648cf1d95edb14184194c64e614c3614f7. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:03:16Z), 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/QZZ7N2563409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325fde9473968adef8e604134f2e065116d1fc1b35a24cbd99c5210560232326. 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/QZZ7Q2512494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc814102e3939c3b93699ffcdcd7b6c9c252b19126166080a6531f305c041a793. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:28:21Z), 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/QZZ7Q2512487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9542b1fab5cee1378d791b2bbab7c17692bc191d5a43f5f95b2f8a52d0edb0. 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/QZZ7Q2512492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404ef39c26f46efe210e5d4b8bbe9cf198da451be91cb4cd08f58e3576c26b9c. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:04:34Z), 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/QZZ7Q2512489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892aa3b69c6d9fb587be44a5eec19a8eafcbfb8f27c58f93bc8bdb22d1853124. 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/QZZ7Q2512518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5604a45a0fec176bd9be45d0501f43f339e7543857d07ee2e65567742d73361c. 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/QZZ7Q2512517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0f6dc501384a1b3b17715d8cfa2471a39bb8498b4213e38229443f07dcdb43. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:08Z), 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/QZZ7Q2580996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a5433f4f1207e2490de5cf0caffb7f81d2fd0e95b641799ac4f4b1a660cf86. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZZ7Q2565098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fec9a4df3675f0ca6dde826cb768c10c0854832b04dd96db47b8baaba36dc4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T12:00:20Z), 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/QZZ7Q2568099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919bc442f81396bcd0204b3b8fe5af75042e5a6f1938206532045d24912117d4. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZZ7Q2570593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111a4223b789dfa19cc8bc6711e11abd00c460fe91f064d666b89865c47a3e4c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:37:36Z), 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/QZZ7Q2565027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490d66ade7d686a0e6d57e2d6c9d48a04f187b12ffb459ac83390a5bf5980852. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:52:41Z), 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/QZZ7R2524142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8366339c729a083d823dbfd45ed27b3a9bac2ed795982269ce6555cf20b9d321. 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/QZZ7R2524151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cd1afc7e1bdf9c0866bad19a89edaa3749e13c09b6629816b409b054936330. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:06:06Z), 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/QZZ7R2524169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a35405855495867dfa7cdba6a918b4fd99c6048ce1c23ba9ed889752a695a6. 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/QZZ7R2521225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8b0dd21bf93f6c163acef96b2687c8c89c3dd216c822b9d03303c158f05d39. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:35:01Z), 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/QZZ7R2524170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a08be1d8ea2cfba26aaa0701ac83fa6bfd64db656df294f3b5f327edd4559b3. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:08:51Z), 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/QZZ7S2519826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced36d771cef992eca36f64dd927cff1f8bce092f896c894d6da75565bebba8a. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:20:09Z), 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/QZZ7S2519823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932864834cfccdb988359ffd1b5a7b094aad6cf1a7e7cb258a3056700e5d50f0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:31:47Z), 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/QZZ7S2519901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e2cfcfa7749d86d80494fc833d57b34690a385545ebbb1d79056b3fbcb744. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:08:38Z), 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/QZZ7S2519841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3984a8344a28200956d98a10312ff4002dd27fc9739b3ee67c5487c421fc05f. 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/QZZ7S2517456.