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 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 0x8ccbb8b68cca4f988af69e0333f4103cccf7c14db6fd568b97308534f478abfc. 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/03e3ed8e-4365-4f22-85e0-4b434f2e98b7.json and https://artists.proofprofile.net/proofs/artist/03e3ed8e-4365-4f22-85e0-4b434f2e98b7.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 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 0x9b56f3eac11c5baeb3c162972a79ce7c3323ed60ff4cf3bc65f444118d1e2a4a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/CAE249800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407a1caf45645cadfba4c25ef247e02c3f297e0b6cd7551a47fc3856746287c9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAE249800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aff84017e5ac8511264fa4fb67464960d6d9a33040085a0ec163286b1eae9b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CAE249800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1650137058ef47bd3b00386144671e770c52f415b230a9781a9d994ceac0c6a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CAE249800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dad13f801d0811029e46e102bf064819cdd7f1a8cabea8fb2483384edf04dd. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CAE249800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dccd80e61753cd1396fe1c6a75b586fd9c1a7da77ac1d7736dbfb93fae3959. 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/CAE249800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14510fd831ff36c10335170916d698989c42fffb0dcdebcc956c3b57873cf1d5. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CAE249800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdb727cda5d596f36cd633fa84b38b71d2e9effcb836df35e559fa01ff1fe47. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CAE249800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424f95c4125b30d16991eb289613baaa72a32df892ba048c5f1c108cc90068f9. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/CAE249800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae222e76800b7a7c3af7f5b28347e0e0cea3586502aa7fd922a086d5d9e50a9. 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/CAE249800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05367a6d9bd295c422b56f62631883551c9f4a89dc74af64303080067b2e1033. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CAE249800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dccd80e61753cd1396fe1c6a75b586fd9c1a7da77ac1d7736dbfb93fae3959. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAE249800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424f95c4125b30d16991eb289613baaa72a32df892ba048c5f1c108cc90068f9. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/CAE249800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05367a6d9bd295c422b56f62631883551c9f4a89dc74af64303080067b2e1033. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CAE249800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819d6661a747effba11ec355cd075ee37ac406f81ddf4dddbed517a337e6ebbf. 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/CAE240000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2cb7b6e12a7cb5bb24359afc5dd407f68199195dd23596a23e83ed797eaf34. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAE240000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62065ba89ae85addd90174a79e07712f7ed01694ee275983c581d440cdee4327. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAE240000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7aaf8d02295c38596180729003b82681f8a7ce773a1203e2942c84be41e460. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/CAE240000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88fbf3cfe1ed348e7615e93b853bf3ccbc0cd2c4845ec02d47b95f62d5bf9ce. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CAE240000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895f5728cda225333ab3ff2fa4f7739a1e932b2fd7e171ab965244f2377b60e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAE240000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb689896025edafcb12f6412bc2e397c3770d81ac218106a759991e947562a16. 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/CAE240000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9794a0603738e20e22fa64066bac08d0a2f3dd3429f8abcd52ae19005e7d9753. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAM370500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7c9be2a1d016a93d161c2f1ed736abbc7939c990c8b028d363281b858df4a1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAM370500513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21be7f8dca784606fd1118541c8a81b984e4e174e8e8d2be525df947cfba8527. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/CAM370500521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424f95c4125b30d16991eb289613baaa72a32df892ba048c5f1c108cc90068f9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CAE249800007.
Pussy Cat Pussy Cat (Baby I Need Your Love)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769fae83388aabcdd68bf74bbaf1709269cf66dcb676dfe70f0253ed627b7c51. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TW1768271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d847273fe97a20bcd52bac337ff715ec2971d5b1a9fd9db29da9d95605946d. 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/QM4TW1768272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2890d30f071dc5fc6409173d7b5e65b1d0735d8e568c086d843ceebc4f84b1. 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/QM4TW1768273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9322721b1d2ecd3ec3202e5955c2a1c6777d322d999db63df375a8327eca42. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QM4TW1768274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390898b735c4a61a42e482625927526aab08e78152cd0d2107b29634324a7aa8. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QM4TW1768275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74557b5df7570a0aebaa72781988c4c4aa0b96685df311554733a79bcefa93a3. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QM4TW1768279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748d08d9f892430254223c512f734b0c8095ec80a3720771e42f59c3c9536621. 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/USTC40890522.