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 0xc807ee270ef0d8da2d7751d35e0afbabd0925b9ac8d5aeac913c830209f47d2d. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b050be5e-ff50-4b95-b1b7-eefd9a9b7566.json and https://artists.proofprofile.net/proofs/artist/b050be5e-ff50-4b95-b1b7-eefd9a9b7566.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 0x2e7ad86cc253badda06e5d03142f3997882365d143e25116d2c3a89c44f9aab7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AUNCC2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216c20037790febe1c67f16c97ccf5022a9809c74b06717e7ca5185912214533. 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/AUNCC2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055469b54092168b179c7ac2204ad385374213647d02271b3631eaaffa380064. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/AUNCC2300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff24b4a53d01ae0a3f825baaa75e840a91eb6d377c36ad1da566aaf50d33b75. 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/AUNCC2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cbebe4f3486da7d4f5da8a99c70e688bc09cea842cc4656fe93d10e1becdd9. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/AUNCC2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9656bf52a62e9023ff55518f6a51a03552ed4802dbfc2a1bfe821561b4ab6da4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/AUNCC2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dae19efcde89c44164dfe0f989661e35b32772d65bc06f53a5337bc3201c155. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/AUNCC2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e71f4a8cc5d50a189031ed527b1932a39b6e05e8dd921c3d72b130e1d0f1c9d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AUNCC2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb170d2535ee70dcabcf63aa623701e73272c5b0d69554f24c5d6096a573357c2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AUNCC2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48bc04d00d4fc7887d5a45877327f010dee9fbe1d2c9cb591fa4b551cd03956. 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/AUNCC2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a67ef5bb7581a6d952cbced078704cde713407174d478b62aaf3bd328fafb8. 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/AUNCC2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b23b24d2cea709c1f20e071bac9745f30289aca74d91b01fc9eeed641d4330. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/AUNCC2300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835cfc77878a880520e450c34660c11621b75d7fc7a73e038ba0d36dacacd53e. 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/AUNCC2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afd1ed54a2132ccf59b263c3cb3e9d85d8e653b60616988f5004ad4240f0672. 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/AUNCC2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262462b7119e4d969f31bee4ef76e30dbdecf354a1014da218347d458c50be9d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/AUNCC2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8d9228f6d6757a82668efc3905d872fb16ad4584c18e8d3a90b79b37693a3d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/AUNCC2300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf63d75d81431d1f6aa6ba86f736e9fd584a64d46eb3f1ee77c99450170d7322. 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/AUNCC2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebb2041ec9491aae11a6de4d8652509ec0695590c85ca739fd03e37b85d4c29. 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/AUNCC2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1783ea8c76cc97d5c59a859a74c6de135d19a7a1dc650bb062680ed66f9e21c3. 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/AUBEC2069932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d04622dadefa2422baca19df277236edd647674d8e436a0959bc5030625e17. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/AUBEC2069931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e73a95e315355de3061a0c9815766355e89b4ccfb639c713393c23893e988f6. 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/AUBEC2019427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681f612c41e83e82c6bd1ed7f41dfb2ae0b34a97953da087df32363cfb2c4ec5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/AUBEC2019428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a266d87cfa3904306eaf97b0cbde9eec027a57faf78d58bf171d5e4575604d. 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/AUBEC2019432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6349f35407fcc0812e9d443d8cbe21d9569ac85c303f1e977ca0a5bf42902b2. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/AUBEC2019434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac3469dc9b22e052a48e38d657fd6192e10f42aff2ddb036badd964c6c9fe9a. 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/AUBEC2012594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac3469dc9b22e052a48e38d657fd6192e10f42aff2ddb036badd964c6c9fe9a. 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/AUBEC2012594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2960c2fe0f6a5c14f0a9e88c78157a805c5ae96bb33a7a6438c98b5ec9e983. 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/AUBEC2004313.