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 0x565670dd1c527b73f958fc5d9eb9e8bd532b140b2ade2db6524e3045edc8f564. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da564b45-5f49-4ecb-bd70-2b86bebc0953.json and https://artists.proofprofile.net/proofs/artist/da564b45-5f49-4ecb-bd70-2b86bebc0953.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 0x02395bbb6b938cd50a2ff2ba39f0ee0859762b1c8cc244b2ef9bc740320e20c6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:05Z), 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/NLS6R1853020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4df92bd768ec1a5919a0267d3f9e0beecf5a1e399721929bf9a6a020ada841c. 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/NLS6R1853021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bbaea3ac235056d531bc6ff5852d0f4803d89b5c300f100b4b61838614049c. 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/NLS6R1853022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad273b8d83fa5db0512c57691e9918e0428997caf1d5f5f99775bc36ddd344c6. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:14:54Z), 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/NLS6R1853023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9066c536c0a94bb44776cea2877c5d40349cafda1772c18ed201ff1ab37217ab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLS6R1853024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf0d235d29fde59f755237d65d46e8bf5e6dbf55ad8037138ae4407c8b25c4c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLS6R1853025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646a37d4a5d4347e9fdff705763c62ee85f175756f2bf738ce49e418e2392730. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:02Z), 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/NLS6R1853026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5849b7be6e67bef936395f49854d611748c17eaf607cb7a2fad128f031f2a98c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/NLS6R1853027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020657d65b3f98700a1380e3847da51f9b75be96d8a7fdb155ac30f1faa0aa48. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:19Z), 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/NLS6R1853028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda536230a39808a5425a63bd1836e7a518f01b231a72f365e4dcdb4227859fee. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLS6R1853029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d32913ff873e70babcc4a1aa554ccaf8d06e3dda253cfd3aee3ed4ddbb7e5e7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:17:13Z), 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/NLS6R1853030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1ab7b4b16577b6e795bfb3235dd2909e620f6fdc277870fdd9ac8a647aa6ba. 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/NLS6R1853031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e61f77e12b9209287c0a06d0c95747363bd7711ed91219de6696c979c262d13. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/NLS6R1853032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcde48ea1060723eba81419fdaadbe165380f1d093a84a577fd741fb3f0555a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:27Z), 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/NLS6R1853033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8d29b67358a2224f4061f4493c92ba16819cb149c8c72e43cbd072c8e4e081. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/NLS6R1853034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823568264480418495a079c90b8302c3f697b4c9e5a8d070e5438c540180acf3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLS6R1853035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e76aedfec5c7b0e5207418ba90f6e6c4290bf8b2a06920a905f0c0579e31a7. 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/NLS6R1853036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e54f7f278f395d621972ed241449a15bc10e3f223ec5d5d0b2b27de372af9e5. 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/NLS6R1853037.