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 0xb2b60e99013839950a90ede4a18d2a69050cab4c0586a6d2cf028615c8f94872. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfca2fa4-0897-49d7-9855-93123efa72ed.json and https://artists.proofprofile.net/proofs/artist/bfca2fa4-0897-49d7-9855-93123efa72ed.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 0x8bdc9e340f0cc6079093e9572f488a70f7e2a0b053a98eee10fc935eef402451. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZTV32486246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef97874ca8a1248fff8ab4182012b78766cc36e9b55bcc5b384e8fe86372cb0a. 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/QZWV32475826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ea44ae594fc6049af40b7566662dc32684083efc9d5395492f34b4837f0298. 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/QZZ8A2464847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56691e92bf92599cfd192d879197715f35ee84a5ed09487c0c638229ed48c987. 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/QZZ8B2471685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617c2d2db850bc8b5e362269643728f7c4a1d9f8811995d72e4691897f61cdb0. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZZEB2454287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5969bf6764cbe29de3d8d1bab3b1b095de55188c140375db9f6ed7eedd564e7c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USLZJ2545119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caa593daade32aac2bf51b847d038e490200f97f53d9d45d2c9a8e4e1c4f207. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBRKQ2589828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef97874ca8a1248fff8ab4182012b78766cc36e9b55bcc5b384e8fe86372cb0a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWV32475826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdc9e340f0cc6079093e9572f488a70f7e2a0b053a98eee10fc935eef402451. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTV32486246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ea44ae594fc6049af40b7566662dc32684083efc9d5395492f34b4837f0298. 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/QZZ8A2464847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ab9a88258a3ffc2de6d9b0f8ba3c83db45fbce869631ba15ca431281b0d7df. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBRKQ2589887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5969bf6764cbe29de3d8d1bab3b1b095de55188c140375db9f6ed7eedd564e7c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:39:27Z), 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/USLZJ2545119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56691e92bf92599cfd192d879197715f35ee84a5ed09487c0c638229ed48c987. 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/QZZ8B2471685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617c2d2db850bc8b5e362269643728f7c4a1d9f8811995d72e4691897f61cdb0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZEB2454287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa5a6e0fc3193378f220aa184d9c7868f02aa8ac2c62017aa455c6c52f8306d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:41:45Z), 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/GBRKQ2589960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0447f2917b75660ea2120f442eb4f3a17cb7b20392edb53c14007451d863b351. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWDD2512474.