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 0x47eaec39e9694838111c19c07481abc691660ac5fed9fa4b2326cc34ce1003dc. 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/351ebd62-31b1-4950-b284-1f60ad7f0e06.json and https://artists.proofprofile.net/proofs/artist/351ebd62-31b1-4950-b284-1f60ad7f0e06.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 0xd4c85540f6b8e32bcd66bef5c85d8223b02f07d791f45de5d4b64de198d17738. 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/FRX762262445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a21732c02825182caccfe424a74889eccc1abd5fa65358f07c9f5edee5ad8f. 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/FRX762262446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e95f8423cf8e57008ccb78c6b02c9073b43191c8ebdea79c24ee237bca44d7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRX762262447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068ea8151612899f79483b48cccaffaf77eedcfb5931a94e03a6bf63dd004720. 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/FRX762262448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63afa48fb1cfebe31c0ac67a8d9a1e818e0afdd3c68e9d1c6af72ba64076d13c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/FRX762262449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2236131b21b414c2c9b872a17d678c70995f42ddd875130937ebd729fe139b26. 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/FRX762262450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e1c7096b4ddc50c4f3aa6e669f2960a9a2277b429c4512703a6d613f238319. 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/AUBEC2232715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60ac4a8b0727bd39095f1286ad342853f164a6af92542e030a412dc2d67ee6b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/AUBEC2232716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf08d73fdefbcc009244fd2f0ba5beba2f4af2f47471432ecb4e1f5b9c5dbbf8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRX762262453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a494a8d78cb2758b744bae7453418b209bf7dbc48c91d7e817326111bb71e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/AUBEC2232714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac9f38781a093049883a2a405c0df282e03e78426c952ddb6de3c50530651d7. 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/AUBEC2404447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8c8cb00512849f46e026cb8b97624aadc45c5279de2f91ba42bae8d0b68ca1. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/AUBEC2356127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b19511c7dea62e37f071c7db8b49fc1e7b5a0fe338dcd4a5ca50c70536772ac. 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/AUBEC2356129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780f60ecb571a281c460ab0bddd7d58c8842518a531c29bc282f7987a891bc09. 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/AUBEC2353200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ceb1958ece9ab45a2627383cbb338f0305684c665024ed0accf8ccd35b899f. 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/AUBEC2342521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f6ec6131954d85e342b0d8129196436320cc4b97b14b2adccc344d6643256a. 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/QZK6M2366908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0b4187ad2c6391b139e1d0e8251a4480d5e2394566e301aff6a26ab531776d. 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/INUM72300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24052cf302c869899905586132b9d9b7c9372130a236325691cdcd9fcd575432. 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/INUM72200250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c6352e10a2afd94d16454de452ed260d0e50cf2091c5db1949417a0177e57e. 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/QZHN82203724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916576fc06ae803fbcf272d4d3fd5a7c4982a1c8c6a35d99ac9b495d54f10fcf. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/INU251900337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe629c591bc989abdd910bffee1a42deb35c77e646e61629b4c33bcea8ee049fe. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/INE181709927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023f170e344179502628b2cf656039cc0eddf5e88c2f37f8206c085aa0cda03e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM7282482462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e94716bb0a0bfeac9fe84f7def2d3f75882b66d3f6fea198e732a08ff673000. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QM7282482563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4990a3486cbd622875452099bdb9e15ebeb7634ea638ea88f586decb68d2e98a. 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/INE181709925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd539047385d653e1d15da2b7d1644a5627c331f72da06437355e92540d9f803. 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/INUM72300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6f2dc11709656c73009aeaf4aa8e72fa10d09c5a811c36bf83a749e853a58f. 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/INUM72200285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1122718d8699ad02a85360f9536e495c930bd89ede24c6f731b37b665ff58b86. 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/INUM72200267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2a534c674d80f51677da3e6281035b338e50aea79cb323827a7d5a7f15474c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/INUM72300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3364b12e7c9fdf292b78a517b57fcb7af591fd2189bf755d7d2d5ee1718e99ca. 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/INUM72100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ab07eddebfcd7b504b6f22251c15611acf1054facff8ec51200b1f23cf876f. 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/INUM72100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e354e46790dcb4dc40d1390fb15dd3062165611da5dea74b1a9899c57b6aefa. 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/INUM71300898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34080de1bb1851e4bae94f56b43149bc828317174a1dd0caceeef64152fbdabd. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM7282468263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f3b7f708221cac8d0190e7dca4ac22a501249022eb7a0819ab2e0eef4cbe7b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM7282468264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b45d54bef7f2dd326fc2ee650a90f35c4d0e021a9a59bf1ec912434c96bcafc. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/INJ221903036.