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 0x6fa3c12f10583ae8d31301c8fb80192346632d099ee14fbe1fa4f0ae708635f8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5180c2a-f367-40de-b030-60252eab7c6b.json and https://artists.proofprofile.net/proofs/artist/a5180c2a-f367-40de-b030-60252eab7c6b.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 0x6b1c0f7a73ee26ce64dd745c6baabcff5b0a1177174af262c454c045abf4256c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGLM1994205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300437d0b786617b8b9c0b50c6ab4380fc0d339c0c79dd03236b9d15fb2ca338. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZGLS2261057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591888373bd05cae06b9c02393f873497957fb89b383bb5d709a714d76f8d978. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:36:23Z), 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/BC8FF2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e0de9e105b83cd2b92f046f435de98c049e5b12246caa55eeaa43b1e4ae8f9. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/BC8FF2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59f30eb18c495e911915fb594c6e3bcf73c97f3634a3915b0dfd74591a661bf. 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/BC8FF2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591888373bd05cae06b9c02393f873497957fb89b383bb5d709a714d76f8d978. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BC8FF2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421d1a58edb39cd6f98b132e2dc9e89835d4de7e3d5f84bb60d05f6954a9b80c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:39Z), 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/BC9FF2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e0de9e105b83cd2b92f046f435de98c049e5b12246caa55eeaa43b1e4ae8f9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:33:58Z), 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/BC8FF2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c09fef79824140e5d32aa93c09e8a098c06b98590d6a1734605bfbcbff48bb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BC8FF2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cab5ae355ce2a74edd679e6d9878edbcaa54ba37a82ce7315f5ecc5e71f3b17. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BC8FF2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d3566b6ecb4641d184a7a8e0e6a6a9c18857243f7f58b1be3f79ff320f4352. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:43:08Z), 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/BC8FF2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dacbcd76452621fe361134d2c4fdacdb23d803b2c787b20ebc1fa806cb8abed. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:02:44Z), 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/BC8FF2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2b68e4c81946010da27eef67ac7245e516a37887fa775dbe229f49342e787b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:37:36Z), 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/BC8FF2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ad4b870d9332cbf9fe4a36005e9faa23bc7e61d203ab4cabfba8e5fa20ac15. 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/BC8FF2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f1d88efbad547e9296009436c5595aae217188c4c2776644442b1d0a7ef500. 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/BC8FF2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f2142c4e99bb5b04cfcf164c3a7c091d82567434ae0f63955785ff92ae038e. 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/BC8FF2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081bf3105a4c1e455caf6d03a32ec19575ea641cfd3c22db82a1a5676aeee4ed. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BC8FF2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0e53c69938230e2d73c7035716dbce1f0cd04ab18436ac67328efd27a7a117. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/BC8FF2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a50d0ee168158ad8c610c0c0a18e07c5c68c53b00a14a788a2ebf833bda1a3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BC8FF2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa467af7d77b7602378005bfe1a2bddd9f23e0fe49e1570e9ae52f0f67c8b28. 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/BC8FF2500017.