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 0x05db3955ad1e1a0643f4f4514e6c705c07c667023901eecbd2b4cda4a904c87c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/905f20cb-f0ee-4e87-9397-eaa74ff213d0.json and https://artists.proofprofile.net/proofs/artist/905f20cb-f0ee-4e87-9397-eaa74ff213d0.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 0x9c250ba9e16adaefcf2082ff40e87b72f992014ce9ebcab701d91c3f73cd4345. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG731792732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ce74f032d765b0c4a58314f9b138aa25a1846910898673a7595d2358db3b7e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKG731792733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27041c7554339c0d01e875e890662a2a7e43bc94bc104e577c1d5bbfe0c954cb. 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/HKG731792740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1309b4a7922f9df2290577a6f3f887820f6108805677e1647a8c876b770489. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG731791314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c375cc25d3ee2ada7c4293f62a865861987babc7f46001e4fbc129c3cc3260b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKG731791315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c0233f6af77dc6f52b7f5f4f70e49b3cc0632144ab98e6d26844208aad57a5. 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/HKG731791316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2d32593dd4ac74fc53ece2c09b54631f96412428abd7566802eb8b67c4a1bd. 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/HKG731791319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07207ff9006b80da4d0578c25e33d9f3b1fd6d59b3b2a40dd4aadd863920404. 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/HKG731791322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212ac41301ea6d67882b9d369ca0ae9097b6bf59dd9ea9ce1142da8c4dce7c7e. 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/HKG731791323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8365ab68d889e73e74d229041ef1031f8263d726f63d7bc6f3e4cbddd34d4c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/HKG731791313.
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 0x77c4b86df4885d244fb1e891c35e7912cb8100c8228d7effa5e683038124ba7b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HKG731791320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed8a9b44f4705d5dafe2b0dbc30dd0b51e395359a94d50bdbb9534b59ff7f2e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HKG731791325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5594f00f4e5089d15b3f4e69c22a0a285e296954d8396e1d599904a4a4a17a19. 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/HKG731792773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823ceb54882915cf2bdf0316292ae20e3f3ddff0d33e552013b19e8f0f72728a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG731792777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4b1a80a9a6d647cdefc2fd8e16650fe6ecf5d1d7072c78d583f7ce7d683cc0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG731792778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3b853ae20c629e035d42cc5efe2000bc8639b41de9753be05bd7cb73992928. 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/HKG731792781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f3f3275c6a5352492921ff51d558f64839e6fd906f05051478df878a7b25a3. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/HKG731792775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d5c73a346c84a8abf1290e7cae8aae0ca91a0bbe5ff41a3c5d17e2857b865e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/HKG731792772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97851b384fa10e569012fe3fe14bd4e529535baabf83bfd053199cd29a48ce0a. 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/CNZ502200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd832b7b2e1343aada6c8fa31cc385ffd432a49d8d286015c9ff62e394cc33ce5. 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/CNZ502200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d112dbf7ac24ef4183de01eb88af02124ef1c476e9f79de80f1af0437a471d3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CNZ502200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4367abc6e0273596de2a379addc2b51a11d0574edeb688e1d5bcab1b40339fb6. 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/CNZ502200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d69dd5d2121d8038c163e5580893742124b8423c81031831418e9c6ef93b24. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CNZ502200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d5ebcfce03337aa1cf4e587cd27919a11c0466a0aa0d1823d58640e11bc25a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CNZ502200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb84b2574198ccba2147ba671f2d7f023a946d43dff34d857e186439e8b67252. 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/CNZ502200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11875bd26d042bf86b0b88c04d6f37b8dd9eca4b04295166397a4384d004a90a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CNZ502200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ecfa36bbf5e662c17220d5f5cab5a39a8e55652f738654f98d0d7678c2f4a0. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CNZ502200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b42a91127f783b82f31d005c77bc4c3b45eb5b86184caefb098080cc3f131f. 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/DGA0P2305702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6b7a73366ae46a4c27347a3675a61834ee3e1b439eea503e1f56439e62b126. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732383386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3becaa9dff1a5aa55906b7a1d65ce8d842e90831081afb964c3ee43cd366ac. 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/HKG732158578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3392cb39062622da3d5f16a1457ae0380a46f32d92cc11c5fb37346d36439f7. 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/HKG732157709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fea98939e152e16b2bdc31b52ee1da6ca504f98ba2254e2b69871bbe6184cb7. 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/HKG732422816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4aa6a4b25dafb9e4daf9e152197ee14f727e32747d255fb44f5b1cc30732b9. 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/HKG732109436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575c2d10a772464e2e0fd55c591054d27dc589d1ac3ce6240a227c86993575d8. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/HKG732109437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e838d0be1679b71d1a4f4fd9bc3100c8d54680dc7ff3819a804993806307764. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKG732109438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc025d9fcfe566044e02c255868d5776c19c61bbe39fc37fac366da50e0ced5f9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732109243.