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 0xaf0dc7767f717a14a1f5d892758a333dfc41082e30f279ad360fce2e2dd16a96. 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/c6c28f47-b004-4007-8c7d-5fe8408dd93c.json and https://artists.proofprofile.net/proofs/artist/c6c28f47-b004-4007-8c7d-5fe8408dd93c.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 0x531cec14f8bc8578b9d62095cf85cfd6354fe985b76c48af238374ff7bc5b352. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZWFE2306676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef111c6235ea99536f560de89dbd89d5f19a68a5f2ee5c93ae95ccb1a908d81. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6L2430799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f62746f01ed9cfb2cda8e75b02872f763b56bb5e07235850bff91933ea16b07. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:35:45Z), 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/QZK6L2430800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db2e6ed9b00fdeb7c5f9875087422139ba21c52f4e2d9a122045e3f1fb63209. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZK6L2430802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f32e27cefd6c6f5a6e9322f55a82cfc229559662bcdbfaf3c7546327a4d191f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6L2430804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c9a82bec01218706c2fb2a4529968baa207864ad99066e0c134623cd8214bc. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:52:15Z), 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/QZK6L2430806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c525153f4fc7d1458b8aeadbbdc66c5bf404a5bee47bd3d12b82b03de5c5841. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB72444379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06854d0dfd89c8d2527d015a623e0c8c8b6321ea36d8ee7728b8e18621fea18e. 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/QZTB72444380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a83b695a4152b84b4521512fd44e5887c6f2995710fb23771b934fdd3c8334. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB72444381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10db7ed48b4d21d92feff16975dae53142999d5270f7fb4f8321f42fe76ce58a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTB72444384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa705011e0b616fb999272858b794a6fd4e83b4f89029dda23585c10ea3eb2c8f. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:26:35Z), 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/QZTB72444385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aee6b0dda65d5392da9b6bcb25e2a549571fa50b693567302ce2e002a0a806. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTB72444386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3945613d23614a19e9dc344af8b1a5d185218f163049840629137b5ab502a0. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZZ792412841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33a55ee6698554cb981ea57fbae0be8440bf1caa1693139f431755742695e2e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT3F22410111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951cb1c165bdc986cb3bab21b9e05715cdda7b4fb4ea01659e3addc6187e114c. 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/QT3F22410112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4d1c8140ad464933f34df102d4d534f1cc2f32c371b0106116457a080f61d4. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QT3F22410114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a6bd17eb8f995a9c4a1b184ea1f0eea9e057c18159483afa4603abc6a4ac7d. 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/QT3F22410115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c33ab40a6a27d044b45437b6cac08d1ac17de701e6ec7df6d45fe7c2c85738. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:51:42Z), 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/QT3F22410116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035c16d713f8063c7c0047f6efa35cf770cacfe85285e817b58200b6a42fb219. 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/QT3F22410117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd614249cbf4d614f31899acd57920944e9b472d5f5d3087dce28d5bc7e88bdc. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QT3F22410118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a7e9f8b759999407c90693c6c911898a3aa525047a780c2275178396154f3f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT3F22410119.