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 0xa837c014a2883a76afd7b5b347c3a09d0d7853eea5b8329c90c980fd30e09818. 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/77853e6e-0cd0-43fd-9b28-2fdc0693dcbd.json and https://artists.proofprofile.net/proofs/artist/77853e6e-0cd0-43fd-9b28-2fdc0693dcbd.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 0x7e65dde252daaca1da78315f0eeb1aa66df9a18ed6e411120df04cd73db08f34. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTB42234799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b2f0235c97976a7adacd80b9d8874436e2a34b392136c419d3b0e955ff1ddd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB42234801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf388d100c268b566b0969fe6b7098b2610bd676d2ef8fca9393d97fcb12b3c8d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:58:21Z), 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/QZTB82246873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433b661598e83af7282f241756b166564b33b68741e12270951f29f788bdd226. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWR2380162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3475707f9770bac4e59260be8b6d4a79fbdf4c89b225e14b32f8a0dacb7d1dec. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:28:13Z), 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/QZTAS2351552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6422d8a051bff6dd891cb66eb3f05b78a5fe924510fe7d4b2cadf0eeaec7fb. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:03Z), 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/QZWFK2337936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061aaf588df845058fff0a0b11de2dbc1a026446201aab1ec3f055d5fce19754. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFK2338344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd855d09793b3cfc40776fc3c4e29644c6dd6eb5dbd9f69b0cee6e57752b0427b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES72465507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61074b8b6c9de1bb5bd44639c208db7c0c50016d80a4242c3d7b441ab4bb12c2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:00:38Z), 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/QZHN92464198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7332d4b712e2214b16de47e3a2d74771485119603969a4990141ac3ec37f1638. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYY2517060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ff109b66bb63e1a98ff5ced1539e2ee158cf8b83396b893b4706e692dcff52. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZFYZ2518884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf871475b4b3ae631f1068ba35720b51b8036a3502e1a8e010554cd2a7c4980. 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/QZDA52589799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b165e296cbf2b11123c6ad85afaa0706c0c1e45e92760f4e98bd3192bf4961. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:26Z), 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/QZDA82518776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af3c15b1d9626de19e1baebbe04af04b6be29f1faf643b09ca2f2c036f002c0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMER2536414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a36961d3fe4916fa963a456be51db138caf4c6f240c554a33be9597a38f3e. 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/QZNWX2595105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e09a2b3e6a0863b6666c78ba9418b5a0cb30d9eb8f65daac39af05eecd3db9b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTB32558117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e424a062fee7d7d4e4fdf23d6ce3dcc8fad2092a6e3727ea30fce9dcd1d861. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7M2509721.