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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 0xd8bd07fa27e82dd5955275c1952e6b4bd41edc4f3ca96785973a053d840a79d8. 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/6b93c13a-eec9-4b7a-9a7a-6fcc5640cb4a.json and https://artists.proofprofile.net/proofs/artist/6b93c13a-eec9-4b7a-9a7a-6fcc5640cb4a.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 0x1b818192286d94e5560ee25629d046ea51acb561764d493cb15d3c8c341285f9. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZ4JJ1767077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1872631a1a22dec3d850dc45c5e010db3a1e4f323cb15a9f2634c9060cd0617d. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZ9Y21708434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4f55cc76fae102137719d1905d15cb57a97a0a7bf69bf8f3cd7671c957142d. 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/QZDA61800623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a59b84e7700685a8854b65c300da6eae11486d7e99d53e099e681583f4cdf0. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZDA61800624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b307f6fbb4b899b4a4a6115a0ccd5c9f30fcb462e0a984705d5d98ab0951c4d. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZDA61800625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7f7adaabb77e933191fa373e34e418f71c6427aa26227abeb63b37b2271fc3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA61800626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f806aec00dc002e109fe486f9ac9b2c6c40d91c8857d18d7164b27e750bde7. 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/FR9W12308915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7521ab2d415fea77caccf475c7ae20627738a643459214b0c6ae62d57735c7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR9W12307260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405737222f31d6f858456b624e89099f3f09e828dfaf606a37eedbb171aba13e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR9W12307261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5362d2a134d41f05231b55855484fef90709c2795d6e5db94b290e036f7ec6. 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/FR9W12307262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f806aec00dc002e109fe486f9ac9b2c6c40d91c8857d18d7164b27e750bde7. 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/FR9W12308915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9d172d16ad762f2ab061fef1add243c37932f0212bed982f32e2ff999b7b59. 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/FR9W12308560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03d9fb768b3bc304541df83211bff0bed1019b8657999f0f8c52418a29b3cac. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/FR9W12308561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156befb320cf4b28e2f3ecae47767bbcb89cc3a463611630b9a8393a2be077b5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:40Z), 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/FR9W12308562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79d1c3e6502e4b149431739c4e2d8bf29ffdde2c9d1283e9a8695e440a8f461. 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/FR9W12308563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17800a12bde0d07740214d77b65d152c557dc703010588637ffe5d1823f4be19. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12435522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26295015288c0a6476cf031ae426703b179eae88bf73d100ce7fa8acb0e54ba1. 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/FR9W12438604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2b17a080aaf4e637ac2996072f579b51cb3b0493df66098ee7816b0707c8b5. 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/FR9W12435518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e03eff49fed84d3c2cdd0bed8eab9a9b9b42605c6a85322ffc749a195dcd2d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12435519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c74c3f8c780c67fb20fa2f8e95f58ae353c4bbe4a97c4cd0125b4b7e605121. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12435520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bdf171be6a574f0c742bd390f20e6fdf6b8437840224de44b45e9243d658c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12435521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26295015288c0a6476cf031ae426703b179eae88bf73d100ce7fa8acb0e54ba1. 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/FR9W12438604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17800a12bde0d07740214d77b65d152c557dc703010588637ffe5d1823f4be19. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12435522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99270afba5d0e436e81e39117ac9dbf350fc710d85bb92182b8394f3fb63236d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12435523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a91603ddfa7f2de1e0d2c2cc0e9a6bb61257398baaac5e9efbe46823aeedf5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12435524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52f6c45e251aec2eea267e8ffae4b1f565f742818d16737b6be8fb4300d91c2. 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/FR9W12435525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0634f35408fc1486b7a021aa669314841042b363fc1636a0cd86959f46f154. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12435526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2777ce914d3cd1625e5e1a1f30c15106b15b033e61787739293f72904dad142. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12435527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f887a5aa9a3bc7220cb4338f0cc7b1699b729517e9d8d59acd907392f68ec2c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12435528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10573d25d25a34d3838d0b879316234cfe153741ad04bb9b2931cfabc0f2ec1c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12435529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fe6af934ad5aeece411dad18fbc4d1d09d1b167180340562fa4943ee407ccd. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR9W12553537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a788b9153bfc08250cfc891fe0f0d05ca33266104aa6b03eceb5c79be4d29ea. 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/FR9W12362488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55809ba4c1b9c4d2022b03fcad0ff8b44da1dc8cf246701bcbeaa9ceff9d3e1b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA092218262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55809ba4c1b9c4d2022b03fcad0ff8b44da1dc8cf246701bcbeaa9ceff9d3e1b. 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/DGA092218262.