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 0x2736c8cb1603ffc16f4902cc457bd71e29c3e60ad690fd62dc0a32cfd8176d48. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be9880a2-dd59-41d2-8b78-2af37567b6c2.json and https://artists.proofprofile.net/proofs/artist/be9880a2-dd59-41d2-8b78-2af37567b6c2.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 0x77c2933a5182ad571d1eb64ded7c7a79865c0a1cc702d1fdd4431bab6454b76e. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZNWW2409395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c14d0ab136b94b63a38abd7e4faf090f722cd2198562c8dd94aee42f69a31b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWX2497575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338234d3f632c3796112a464b1bbf20471f1f516329790926e5bb0c7fd3145c2. 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/QZTAZ2460755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e4db608c8c7002143488b14ebaf0873b6c8c6c7956c292fbeba3880a40526c. 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/QZTB42404954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3faf423a175ba987dbe70b4e6d54b4e965422b9a81aa6a9511bcc9615bfd86. 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/QZTB52425125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2268c44cd9dac8909ffec7a9fe002f16838acc225345a6824448a5adf1767bd. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTBA2485599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4897425665c7f1e3fe6be5cd5a16b843678c994f2e1d7dfa8d5c23f649f6b8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTBA2499910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fd4c7fba4b9dbae1e16e0c630032541af8031d6136080e68226d26d6c9e960. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:38:27Z), 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/QZTBA2483410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff474912d229305a0b6a3e1ee09d2ce2107697123c1d74746273b831ffe8f8f7. 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/QZTBA2498114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3178939d3888bb11782747c4cab0793c161774e2e5a19124215b74ebb6df8897. 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/QZTBA2498609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f0ce747843621360d60d3b0e1dc04c621f388634f60f3920aa7df6fa46dd3. 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/QZTBB2453438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db87be36d377235c454cbe5f6dab75cbccdf1b5e72d2a3c4fa0a8626d9ea334. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTBB2452140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4748bf31ffd6bf8abf2d6f7e53560141c7f7cc9b3075ec57cf9ba735a768c33. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZWFN2454967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f5d52cadbb0a9d0c714ba120ee09fdb8f42a990ddda2737894165eb6fb2eb8. 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/QZWFN2452220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd8c216248fa58dbe18174e3207310f0b0573686550268cbabf8f6e82d8c787. 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/QZK6P2591938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d1feb72fa317caec7380480072a3d9a40477ec83b9370010765e7a8c781ffd. 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/QZK6N2519504.