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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3928df4ecfe83b047454522cff9fecfe173dd570ecc9e9f8ed57f98e70c3054b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f838245-01a3-4c54-8054-f6f813bb1f4c.json and https://artists.proofprofile.net/proofs/artist/1f838245-01a3-4c54-8054-f6f813bb1f4c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6679ae08ae3e1147ee9e15c222047249b9621d562c13e4cec9c981dafea28992. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:36:30Z), 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/QZNWU2149996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51821fb5bc7e1df306b6924e322168b68a034919da638e38d51c0b0ed2ad216e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ32248812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07749820102bf55afde9457bfea9dc72b3384ed9c6dff10567a650fe6b83464a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN32211879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c5a96d0e058c2ba767a4bd8c32e573406b2944cb2089ac58eb5ba314e350aa. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6L2267503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99efef09b1a385d7b30ec50759d77985756a148b858fbc78a3af94800aae9a1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWY2217066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc4c07055075a1c9bf92bc64d2b416c2795efe41139d93a9ce626b4bdf3da31. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAS2229973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1c02b8e149578755423fd5d8675149cae360d05b20ae171a4dfbd146c5e3e0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:58:34Z), 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/QZES72367727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53012d4758876cffc219ee2534f0e3c4c23f4e9c1de29f25aff2f9575b91f490. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZHN52392396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11473c029c2d32f67cec61e74f8c1bdfed5051209a0c472257110a81ae3b0d3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:29:01Z), 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/QZK6Q2323498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985cef34508d0e81c3c9c40a92b90c6ebcc949705c484f4a680a6471a9cdb259. 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/QZK6K2352808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3444e3b6e962c9b569ab2533318462712e92577f25c647f22550c73ca102f4fe. 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/QZMER2382684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3997483a24be09ad8d5164bf1d64a4fda9142421be1625958359a55d72bcf024. 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/QZNWR2367260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98339a0e8ea30eb81eee39da413c34b664f28fb680e506386c83d78a374ec35. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZNWT2347824.
In My Head (Open Verse Challenge Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f9f64b4ff1610ee83b78a8c11c0a1f54a961b2683b9532ca729e48138adb9b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAU2333636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52eb0afe729da77ed718524d2fd75398e69e4745f403c652dd5d6f890119de4. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZWFL2322251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b4fbb5d749eb2cbf2ee1cede2587fd1c3d5ad1598908c885809b1d946b9655. 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/QZFZ32431600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e5131208c0a5f474a8809fd2e9fda346436f0cc9cdc5faa64eef1ea3c78094. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ42441845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddffbcd5c2746b203f9964feb2a813c5413ecb7b8ebeee05716cec8c9275ad5e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ42441846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2528f0b0b38663ae28dd2b327f74a562b9e363831bb3b59110430946fd686e83. 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/QZNWU2437189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274a541bcd64978e097d3290f9b8ac7645f1f313b0908cb03d290109d5bb2fa0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:17:16Z), 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/QZK6H2453222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383eea52910f5a32603614427b7ecf88826d951b611d6329ace972bdf1c481dd. 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/QZFZ42441848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51633a3439e69fd1863d9a0c7310d121041d8f97e86fd7161570b37e6152e62a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:00:45Z), 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/QZWFV2489824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0270ef90534e7fc643723764aa45706f9b101f4b2b6d80155444f87bb386ed. 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/QZAKB2439687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef7c95e19a198650cb6a663aef99dff46dee837aed77eac1c819079bc58195c. 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/QZAKB2444128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80952f6c6aa4937416cb8a469713aa01f6158da5a925a75bd19d771a58368950. 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/QZTBB2300481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5526b2e4e5776efdfb405cb75573ab8cf156184f73daf1da3ecb20e8d43f77c. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:59:15Z), 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/QZAKB2444313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cba820bdbbd033a9e5a060916a975202591cda3cd933f35777d3147f4508dd. 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/QZAKB2444314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a79dba03e1340c0ada58e2ad9a7df88b99fac8c1a9629dc743533e8de50521d. 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/QZTBF2322622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e9b5b7e84b8b3a9f669cf4a44f015c4c185b43db5dcdbd6fbfa0ee0e4d4c7f. 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/QZAKB2444315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527d1981fc8662ce5c4adb392ed4075cd2b29f8f189052b3a9e63d2cc012d462. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZAKB2444316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc942e0bdc934765c760c74e207d57f4f0b2ccef9564f0fad717589237a445878. 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/QZK6G2504682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433f17fb5d7fc3f5bbbf75d5629a7f0efed09b08b186442b2b75c3183135845d. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZTB72483805.
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 0x08f5b6e6e6b78a65e280fd7a96a91c967d935091f5229f7bd8ad8a11322c66a2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZTB72483806.