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 0xa2314a29ab96b4235756a8ca92750df34b84a432ce46ce67822758aca1d58f97. 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/03ac2870-bf5f-4287-9bf0-15e86071e879.json and https://artists.proofprofile.net/proofs/artist/03ac2870-bf5f-4287-9bf0-15e86071e879.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 0x6788f112f3edc7e3c4b3ce8c017d8d8e9a48cd58bd6cbe1b2be9b1815c0e76a9. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/MXF440402110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23cb80984acf9df34f105d84cbc2b066277d43959f046eac9187fdaca342802. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/MXF440402117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551525e2dc44439128647bf1c9903831a6d517a9a59fed5cb0487cb46cf75964. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCACE1552796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6c9d6657bac60da507814a3d2ef67e02b9413341c7e32e699412a366ff32dc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCACE1552739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf738d411b4a0d676a45ee8733beb5b617788809f89d3f627112130805f132ce. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCACE1552744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c7109e288c252991379004e01dbf9ef63a6b741f718475b7e52d17a44ef49f. 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/TCACE1552747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a5ae3fb91cd79ba754667b9a620728d852d03cd60910d108c23375f9f6d8ff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6DC1874208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bb81851e58bf95e05b84b4d51fc0ecc94766e2f741a4eb358343aa9c426d32. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:46:37Z), 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/QM6DC1874209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5ce5b3e521d1903fa7211034079aa49313a5a8256ed37b02e185c88c3eca20. 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/QM6DC1874212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3282672afb360eacac085f9845f3fdd9d4cdcedc60f93284d74c17ae3295df6. 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/QM6DC1874215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e81402e7a4abdd9dc9566a1ff6f6ca889c0ed8a14a367dc6574709b5973ca7e. 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/QM6DC1874217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea5cd72d3e79bfc5d8c3902eca142093e81882677a8a2f41969ff5e2daafb65. 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/QM6DC1874218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0367eaa972dd51495b9edb77e3cf3f234f190cf678a14e9bbb8933f7d851e89a. 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/QM6DC1874219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd619cc638f2226755cb6813619f205fe4d71cf286eedb5339752b4ad22645df5. Chain 2 (Bitcoin): anchored in block 957839 (2026-07-13T10:06:30Z), 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/QM6DC1874231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd865f652750b9bfa8c9a8048084b3878f40fbd049a28b6694f8bf1e043036339. 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/SE6A92098509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4d32b0965fba179bf3627618f01711d6dcb1b749068cc2f7f0a4dbb5a17f03. 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/SE6A92098819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5187d2bfe57a0b0f137219101b90469080a1c8c3f692e8d18388703ffb3bee3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6DC2073649.