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 0x87f2220568c0e7583a3ed8667564ee0d57574105de72f3c6fff20286d2196cf8. 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/b0a219c0-c348-4905-b77d-c3f592bf4b35.json and https://artists.proofprofile.net/proofs/artist/b0a219c0-c348-4905-b77d-c3f592bf4b35.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 0x7be7273dc865d9caea1ec562de8ddfe20a0f560f923980bd4a773cb89b8d07f1. 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/BRD8X2100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd13f020f84f7d00fbb4062957e1d751bb85ea04d1551cea863b8b5e8c0a812. 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/BRD8X2100174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9387cbdd20d060bb56adb570200d069985e667770f7725741e40882dcc6fece5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:18:43Z), 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/BRD8X2100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9165a94dec29f3acbe158c7a37e7f0d9774091ff6d2b31180654352b0921e30. 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/BRD8X2100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b644758646fae12e5f80b04202913a8b39ca2fce79f018abc065a60c31c8729. 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/BRD8X2100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6105e6298de3af2961ef95901e8e6217e1fa84d4a853e45805c810359015195. 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/QZEQU2059244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd63cc325dff753ca7d865625e6b00bd7ddf6410d0b7013b761b216e98722e1e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZEQU2059246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c0962943f73dabbdaf83b05f9a2ad5de3c1b6080d9bfb4707dfc321ae13b7d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZEQU2059255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c9b5224cc8b10b42c187674e5a4f00ce007e787dedacc2a7c1596bf58fa8e5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRD8X2100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9536b72eaf5224d12d5f860cca99443aecb998a3060e46b1c1a173fd7f9e15e4. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/BRD8X2100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9277c44a8f3daf8ee95c5f2b3eca62d12722c0615415cc977404bd9374fb6b6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRD8X2100220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43140f566188a1ed476ba1ec7869194edcb17beeef39031b7a148ae46827920d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/BRD8X2100221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa146b1450ea09d1cbee4115eedc5248d55870fe2c0b5a5fd1b32e3c674963852. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BRD8X2100240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d4ced5f0b350b86ba6dd23bb0a8e0256ae9c458e4dc4b3181938f1f2f3ae5f. 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/BRD8X2200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f41413cdbc86971c45fbc27e045051f887f1e7c4e2bb4a1f62ccb0b01e960d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRD8X2300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e7fb5e02a2341311cd3c0e72179872cfecd36f5282517fe741a4c421e480b4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BR90B2401416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc0985a4673503a737091db26fb649bde8a078d04ce225b74d6b2a66577fc4a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:30:37Z), 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/BR90B2403060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1128a0c4f82f6842b25fe60bd5596984bcbafad6b35a8a89856590ea25367e17. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNJX2562017.