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 0xa2e168d8b2ff38fd7f58f740da30f3f86743ac193a14f7d60dd2c9890b68b044. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76e005f7-bcd1-4277-a2c4-2eb91e3b3fba.json and https://artists.proofprofile.net/proofs/artist/76e005f7-bcd1-4277-a2c4-2eb91e3b3fba.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 0x2f12b01464cc26c0b567b9f6dd65c7e6e8c4320b3dfdc29317309b59040a5d1c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX281944887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2544a4e301f9810c693d5ed4933ab03eddf51336b717cd4c4e4ed074509a7e4b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FRX281944888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b557136924fd7276eb7610eee04bc20d558f02db60f69969bf5df3a99a2879. 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/FRX281944889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd4aea8f6b05047d87bda4a713a1d7f6fe9964990c7908833ea2cee7d0a9073. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMDA62268455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8b570a132e2ac95922997ce68a887c1b7665614b678dfb92406f654c46767c. 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/QMDA72218453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c6d634f8936d3dbd651c02eaec0155db61e91fafd0e9f0bc4c1eea7eeef140. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:25:02Z), 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/QM4TW2227184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62a3894267eaf96a3f5463ec8677593d4c896e64eea76b70fb23c105fa4bb9c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMDA72218456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d12919390eb48a1f0b58a51746cb326c298c08ba656d00c4286a8c5b966f98. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:01:55Z), 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/QM4TW2197339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40564f5b01ed084e49a0e398cb6eaf69cde43b3c27257cd6cb6b79392b82958. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6N22505279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea59fd50e53b9431e67b5c7762b2f57a70d1be75803951529afb5396f6ef1a5. 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/QMDA72496811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a88156d3c9102bd1174ea611f60537f71b032f570a27c555b0a495b125b5bac. 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/QM6N22518163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb985f8802ea2b3d48652609ebf2daac5b7f46177f8d487e762f538e04c5a02ab. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QM6N22518165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40564f5b01ed084e49a0e398cb6eaf69cde43b3c27257cd6cb6b79392b82958. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6N22505279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dfd1723b66959da4786ced7af315793347783c97af82cd913b4325c8417226. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:44:02Z), 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/QM6N22517592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea59fd50e53b9431e67b5c7762b2f57a70d1be75803951529afb5396f6ef1a5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMDA72496811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8d781ef2335c83448389c4c8e27b492359f2c2b720b36501625f556220c7db. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:34:16Z), 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/QM6N22518166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dff936499946f1930bfde932bf7d9e2f7bb9c17b81586f4206bcb9b56cf73c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6N22518167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1250c1d1acdf61bc3f3ca946442cdc2e43606ebde29df09671a8af91f9e237. 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/DEA812300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1250c1d1acdf61bc3f3ca946442cdc2e43606ebde29df09671a8af91f9e237. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEA812300454.