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 0xcfcdd6797b27034893766601a9e08c7b3cab05f7e36cbbbe356c46aba479d6c8. 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/26b61965-adc8-4245-959a-e1d421e5803a.json and https://artists.proofprofile.net/proofs/artist/26b61965-adc8-4245-959a-e1d421e5803a.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 0x42c6724173dff86787be741f0e4e7a5ddb5fa2e77ec116614fe30ee3d33d7293. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GRSTY2200685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e7ce9c2e84e935b50be3aedb6e6e58543f1a1982fbdcce0c6a90026463594c. 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/QM4TX2055938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991e66854b395c464c151b7df0bd3e218083b9a771c066541ff6f794b1f29eab. 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/QM4TX2055939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa727db7a95363ece1921aefd4ffe85c030ca53ff46a9df2c1f61a164d48440d. 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/QM4TX2055940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8bcb04cf9d92e6ef25e1bbae9a76f6e9d0ce9315f978fe264c319754ad5026. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QM4TX2055949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6060d306e532a985e59467dd75806dfc13a1cbf750faef21fa3acac13d387aa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TX2055951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5555892b16b83033fb85750524472fa8a1fd377b7c2896424e03a99a5548f8. 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/QM4TX2055953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf543d683efc56125abf861dc5ddf52624a3b0f033a8da9bbb0467082a5e9d892. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM4TX2055955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f4da493f6d6baa50c2384ea52295284493831b7c40916eba7837e4675a91bf. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QM4TX2052834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081d10e40db0c4ee96c37ea3ef31f184afc9f671c305d61fc251eb5ca3f47373. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:51:28Z), 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/QM4TX2056655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428c268e894fb6fbf0a8c7c14fcdc6be7d7015569eea71048176c487dfdc377c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QM4TX2056657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bea4b998443e8bbf4181830abf2f92e7adc5685ecc9d36c980033c5a3d5c146. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM4TX2056658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e239b31d62c4e3b869eeaeee7946e8b85be09f4e2a9a66c85571638a9fbd01. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM4TX2056663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fda11ca4c2c1e67bca6e6a6d664b68c560fe1111b9ea6da1632dd8e34a612e9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM4TX2056664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939260922462227a3c0adaaa51899d84e93133280063643831753b2defc53bbe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TX2056665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321b53a5f9999bad5b7c4cabeb304ca09e31424e20e59ebfbb86bec4688e16a7. 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/QM4TX2056666.
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