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 0xe4e4ae9d9ef02feeb724b117267c31c60cd24d030a19a7d48f4e15375c4cfc65. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b593a9c6-5f12-4dae-8d9c-a8c6e666cadc.json and https://artists.proofprofile.net/proofs/artist/b593a9c6-5f12-4dae-8d9c-a8c6e666cadc.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 0xf336730c8afcbe50a24ae71bb8e4914e15ff10d52b2fd5192e26f7dcaa757f20. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dece0817762372fdec027cc7d1dadfcc2e423e698d9c445d04839fbe3b74f3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9406ec08aed008c8dcb845078dfbd5a30d3c469243599877c14609d5cab6e0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf95cbf0eb6ff530a73a86e636eb5564df9893353c4784c260e82da29dc1508. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKZJ72400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109d82682a1887cc7aba55a5db75ca4b5e24e9fbb11289ae8fad2128fa3ef4b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8609fd2b29ac4b4ff10982640c7161a4f64dd24be17ed1dca1f4e0e9fbe86552. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7835050fd4848adb66e3081c8780b907c15d45b03769325cf21edabac4cb927e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKZJ72400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f16fa7204fd09e8d67522c517dcb13b2fa2a15a83bf1d9a91756ede505b1c6e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:35:50Z), 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/UKZJ72400121.
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 0xab5fa1c31afdbf695400fc5dd4537ed0352b69e2f4051e72a0547e7d2a02259f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/UKZJ72400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c24be88f0b6aaa590aaae92e9b35849d5ddc8ec017297b943b864fff4dd416a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UKZJ72400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce74dd9cb7f8791373df1ec989946f7fbe8c44e531f3fc3cc6a2b3b0f6783f7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UKZJ72400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f582b472c42c33a65809dc7f898b5fd402a4245bd07f9c9d7487769937d41d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKZJ72400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113867dba0ba667a040dec8ddbb91f1d692cbeb11354534d0b3f4ecbccafc37b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/UKZJ72400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719f4e80497465196f653484836046da67b7b47b5f9c110b7a34ded942b7ff8f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/UKZJ72400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d4747d074b2650d9c00f7929e7dd2186245fb243531d8e2d9cca932574759e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/UKZJ72400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12193873378db726f3546690fa3e9693fa9f750cad085a0515747ee81f0d5913. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/UKZJ72400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2130a8911b3e06527c100e81d61ad6905dcbcf76b71b51e3dccf9e4cbca22411. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UKZJ72400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8dfacafb25dd17ef83f2e2470dcc306f4279e4634847f4a101ca3a887059a1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKZJ72400119.