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 0x8bc203ec7092697d6256a0baa0c6177e279d77cba6e7383dd2ec0081546f175d. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fb71c83-452b-412b-ac38-cc878c1b77c2.json and https://artists.proofprofile.net/proofs/artist/6fb71c83-452b-412b-ac38-cc878c1b77c2.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 0xc1f84da13664e58702bb5148e289babf7ea39f91754b82c05683a4dfd3f1cd3a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZGWW2104254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068d1e638ab66b86fc298ea655412dc5bdeed746bde69b26457b3226c4a7168a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZGWW2104260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5616dd08f2f616fd7eb3f1f5fcc98cc45a5fa79af4a2523c5aec9676d84d9f7a. 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/QZGWW2104262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3714d861e80669b2f45a6f3fef0d28bce5e42bcb73363a6ae43b70d998bff3. 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/QZGWX2206015.
Beyond the Great Door (Field of Hopes and Dreams)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a279da4472af097f777f4c06e3295762bff8b8a2698022c04a9db86e940207d. 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/USDHM2030518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62e7422dc011820b33e2c27aabdba50c032636ede9ab69dc88f5fb7c8e8cbcb. 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/USDHM2030519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd745f9e5da8df6181dcf1d73033c43542b41444bc60eb139c5da029561c246df. 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/USDHM2030520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef2b48967b9e287e93722795e982ac2179fd926ea010e917f9315ad922bc3cf. 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/USDHM2030521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db1de72f9163bc90cef56fda6579509a02787d2df3ee45f4af9b503eea32d2b. 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/USDHM2030522.
That Which Will Not Be Contained (The World Revolving)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e1331f36f4de4fdb9087feecb7f89a64d2f81576581856d13ea8d9635efe01. 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/USDHM2030523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894ba4837847c893238438644040a4257bffbe952f54adc302d9c8dd06e8a157. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USDHM2030524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8590a9eac308c8a1b07be787d45009ad1fadd58ca1b6ebafe7a89c9a1294b78d. 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/USDHM2030525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c45d828f59a1af0f2c44a3cf4669c9100d87b37bae5a68be022f4fcaa3195ca. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USDHM2030526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ccfd7fa443eb9947b45ef41aff5ee4493b86a247da02be4f9f2bb60b95375e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USDHM2030527.
A Human, a Monster, a Prince (The Legend)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42cc147d8d53ea554acf2f54748ae1d4bf71961abc9ae175e1eeba034feaf9e. 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/USDHM2030528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2e8984d6adcda699e6270eedfbd5bd4f7df3fb19541964c4b9dd7b4038d536. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USDHM2030529.