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 0x692a0571018d0d1dc4156ea8940f2f305c026009f0e0c696ac39ac45ec43f332. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01077ec4-550f-4632-8a98-a883a60f30ca.json and https://artists.proofprofile.net/proofs/artist/01077ec4-550f-4632-8a98-a883a60f30ca.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 0x8089c1bb18abfe8cb5a56932b593b943d832895265e6bd2bfd62bde7c791d303. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DKZK52202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5536d77e4ff3737d5b7b762bef66b9706c24f59f778f5e1b91d0350565beb1d5. 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/FRX452176754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea580176799af1bb16d44c4a111fdbe4a7b16487e5f158d75ec80969d60acd77. 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/FRX452176755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb86988505849ebc70cd23e5058bf2d7ac78239af194465997878286d7812191. 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/DKUM70800385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ea73642fdb48d9c0fa99304ad4f22f33f16704ab2b1a6ff6370b718245d5e3. 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/DKUM70800386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9d6bebde69a7d03e17a72a0f021795b97283ebba20b90ecdf2fba912bd1939. 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/DKUM70800394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785db3b6b26185b1d3bcaf8e5810b5d0f37bfc56ef3a3140a6e84707ad506c0c. 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/DKUM70800392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96aac063a8942c496b8b1d40012405f9a7212fa54bf0b3f709691de02bf222ec. 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/DKABA1102094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bffcdc3f26da180714e0e4399966c88bb0be22d7a9ffd6f1206b820af9e639b. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DKABA1102822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3421a2badd48f93e05bd2e13ae15f36aa6f33f601f2ee5bcaad2dedf4fcc2e5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DKABA1102826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d33b3e0a23127dd705b50f43bdce64ec901d814945d238a307b08359371f25. 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/DKABA1102831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56872aae3171f8a8fca40306483de6c53a965d7ad7691755f55103077648bb72. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKABA1102834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5e0fa6064baf0e1d1251ca26a45216ab6aeeb9be56562041b788c50afbdd84. 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/DKABA1102838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29e782a03f74a7779065dcc0cf832e3486207a04caca3b8dcd6121623b1be18. 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/DKAZA1401315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6096e5a7dc948bb5476b8a57b5bdf2aa5e95f540fa038225b32b7dfe91c100ef. 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/DKAZA2100320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b946861eadd36e2098482863aa566ee31808b6eda1373d97b84053d4770125f. 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/DKABA1101718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5e47a7450ce90dafe201d8a124aa5063431a863c4356fdf76ec6f2d7b14791. 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/DKAZA2100321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0b81f37eef4fb6987a81efb39eeaecc065ecf91bd03e9382b955ebee745e01. 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/DKAZA1401312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06651cbceffa6d307a33b1fc8cf9f01106bcad86e974d95aab5e6c98c614b8d3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DKAZA2100322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8689224b5a650d952f1ee988fce89f26742165315c97f5d2016165dc9e1a04e7. 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/DKAZA1400385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b26619a3d9d8d0d4644eff16157bf5ebe66bf3690d28c8ab3485779d5861bd. 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/DKABA1102532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c21e89d8f78f18b2c2ea4e6aa268ee158f7cee30e80396a7ae29df7695bee70. 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/DKAZA1401316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2469e8dfde01766c2d0db505b55245b18043fe1e19c59cbb8a38485bd25d815. 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/DKAZA2100323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc33d78611a4ee45e273aba2028e45da34f4e4821fb9334f3a2155a89d1ffdd4. 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/DKAZA2100324.