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 0x1076c8cf15ccd3fbd8cbc52c3561cf795431535c445b7e70ef41ebf4d42c2055. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84056028-0424-4647-9056-98e323728f13.json and https://artists.proofprofile.net/proofs/artist/84056028-0424-4647-9056-98e323728f13.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 0x7f622098d1bf68647c4bc823e29e0e3a10dc9e7314970ba2a60505d06d7cb329. 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/SE6XW2334573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76f971d86561a51750088339abd6c7f5867804b845f90a8f0d1764c9c0d3286. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/SE6SA2331098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92a77ceb67db81fcd86bde97074b8c05db4c1b7f5e7813a1ca4e2b300647c0b. 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/SE6SA2322991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d6dfe06a98df146e1753af1ca95a7be36d1afd4b5eb675323e8e6c73cc73c2. 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/SE6QE2393886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6155eeb4a2db781e70ae6e76fbb89197bed22dc518578257f6a034d410e40f69. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE6TI2320403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dd2a0dd4667b557480e4b15aa212abfc5d2f41ccd423fe1455ff919a9a371e. 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/SE6I32389106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c1f2af55be20f81974012cd19e36919fcd1a089e11587017ed1d40f9a15fe8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE6I32389107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b29bec22ae3d0ab6e7b4cc3e65bf752ae0cfd46686a3897ca34b4ddedf910ac. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SE6I32389108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53018c3d643692cc91663dd8e8aa0eca7d252df3a09366f84b21be0f0615fa0c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SE6I32389109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec2ff71a1ce768195f32cdd00f0e85ecb156914e56fe6409859a53bc0f689f8. 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/SE6I32389110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bab0f9db116cb7daa0569f11fdf497358319fdb309ec73f357585532f9d061a. 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/SE6I32389111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58536f5284bfcb12ee4fe26e40ebd0232815c41edd0a5a1ed54295f1b03ebe2e. 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/SE6I32389112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229c9edc2304b45b4c30e0ffba9d18e8cde4eea37a8e8e8ff2fab1926464f302. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/SE6I32389113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb551cfe134937c4cc80b96b96cea5792780545b5e788dcf4713e14c15776574. 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/SE6I32389114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25d1fa6e2e4d80ff394e7e43fb8b93f48e032056ab19457443b72d04465a226. 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/SE6I32389117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb718bdc43d6c56d5a4bc06b85fc09295349ccce6a3bbdc87b557ae4c7461f0a2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE6I32389119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1ded11840ea2845e90818ce336bd4dab498c54a6a9fe72501b1be57d0931c2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE6XW2390533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da48265303b35bb1bf613d9c2f312ed2f9d60572d9a04ecaf8ecc196ac2d100. 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/SE6HN2322499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf304f35057d7f2e8de24da456cb8cd4ee64945ab179927094ad219777339b8a3. 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/SE6HN1969932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e47ffa9ae888a5adfaf7db08f772e9d4aefe3da6f4eef80cc43f4f022098c9d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZWFH2485434.