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 0x5b38a22d9f043508f419728a5f517b7a5dc9537cb8a6c67b1d580f80ff688ab1. 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/a3789c80-7c98-4a06-871e-b50790575e9a.json and https://artists.proofprofile.net/proofs/artist/a3789c80-7c98-4a06-871e-b50790575e9a.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 0xc14dbbac18298b8fcb7e4256a964e2b27b95fba730a7b945172d73da93326c37. 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/EGA252009108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7604d899c9bdfcf47046d940ba01f2db680bcee593142888b57a05b4680371. 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/QZFYZ2053113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d21b8aaa47af84ef18f38effb48ea7fb8d3c3b8ffb23b6c0a116af27afdab1c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA72006767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222b6be34efa3320c3b51a4be2abb2e737c5858ff6ef17f75673b2c0b9a80e7e. 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/FRIDO2012246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622cd2c0260705712bc2758e016f27c4849d34bd762e3e7034f91500477c08fb. 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/LBA0H1901939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b78b65577bab35dd82996a4faaa11e07cbbd3ea76d7f62c73a8b9971a610e5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FRIDO2012322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062ab47a053698cde63045ca5770aebaa0096cc174ba4bfdebed6e9295cd1dec. 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/FRIDO2111363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b4aecd73dde2233a21894d6f7d153de3bf71615690e2d0d182b0a257d1419e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FRIDO2111423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839921f8db13942b439bf0257627aaf396cf325c9a4edcedd24b20b488f97934. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/FRIDO2112091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e54d408412a7848e08e44789edde66eb26464a4502af08b58f3419197b88b9. 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/AEA102100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3b15d6e2935b8470e03a34c74e3b5b828a149ad7054002b4ed5bffaeebae20. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNJX2340948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240ffcae2fd4dd707f643f6df758136bdd886ddf0dca8be2080c6c226d6e84bc. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/FRIDO2211020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0b39228067cc4132cb7665c4d196f2a00d959908339ba224781efa1ad29cf4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FRIDO2012374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220c6186542addf259c98b71c65c7cfd1a85c06f40acb0e9d205860dfb37d859. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZFYZ2052863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa005516f386621dcdba81034a4cc1bfa348b76c5b8f9f97d531068b0269015. 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/QZNJX2353047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de230b4aed797cd567e109c2013de954f3f50624d28564626055d26635a59d2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/EGA252006069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04be73e4ac2ec74d86e5ecf57801eee8710f6ff1a3edc7c4b2c8e9509f4296eb. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/FRIDO2012410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d3764762e6d80b37073ac33c44f05575f7aa2a62b403e5318a965228b86fb7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/EGA251903782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb305955ef44720930639753b99159f00be1f1a98e7f96e003daae240ae365421. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FRIDO2012407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e0f86e5abb3f153c9e2c2ad0164fa1c9ff936ace4c660683e7e84ae3d08b3b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRIDO2210773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcb919f5ebaaca055c2687c6701a7360dd289a23ecf6243462a8c5dd9d21c1a. 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/EGA252006405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbb8633cc31ccf21d6f25960277d32b7bec8f5a758db76f29007c74a0281e00. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/FRIDO2211617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8233581ccc5aa1f67f598eef61edeb28c7632647f2b431c4693f59f81c2ce4e9. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZW9K2371488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15720030259ea56bfa156831e2f0d5b42ca6786902efae612e85be9c5e01d16f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZW9K2466168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699c40aa726fe193ef2884adb52efd6fc640e9ce726bd9291753503abaef9585. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZW9L2432910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b3db9b4ba467cf5a20b0d1bf43643b89603f1efe6e0d7560473748c95f9a91. 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/QZGLM2507449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ccca230eb7a928138803a0e6b62fff9bcf5596714e31aca8ff96689b90b2c8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZGLM2594133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fe6d8bb71bdd95b4e4f35d3cda7e1e1e9995c30f7801ce491be8f3bdcf710a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZGLM2594134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164ddae70ffb352fa8d68fe77e959fa5d6630eede6674e1179b5df1296f621e3. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZGLM2594135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845fc542092dfa438f59269b18c50f0f32d84718cad27f793169ca1cf7019b2d. 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/QZNJV2569384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8358a4bc6199c091cd6eeb7d33f4e7a7579ffed9c815957cf135c9fcada757e6. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZNJW2587028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f94fa45b277a78584e45aafd5cc0cb716555bf1d1e7d232da0dd9ab2c0df218. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJY2527069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43491390bbbad99beac689f49ca651261925b2485ee149c95366526bcab9d4c1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJY2588366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835533f15ede734f3e57b56aa3f5c087309046e630b494613b929212a7945ede. 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/QZTPX2540461.