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 0x83d85bf2188826acba6f05705cb71eb163fdd7614312fc15c18e5d6218cf994c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34e718e0-f999-4741-9e2b-c6591a6ff4c9.json and https://artists.proofprofile.net/proofs/artist/34e718e0-f999-4741-9e2b-c6591a6ff4c9.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 0x8c31ba09bb599e711b64cbd9197c607d1b517d679fabd2c555ede1e019b0cbe2. 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/QZFZ41925601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa376e0879f57fba2e87489d5f8433fae85767551f35c9eb779caedb9e908deeb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:18:42Z), 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/QZFZ41925602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984f6ebb5610c092e23e8a00ed4b7695d62b9631bef040200969e2654e32a17d. 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/QZHN81954373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8331c5fda5cdf4d33b73ea5795850bec0a56ddbe43e1643ab076e9af0202b8. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZFZ22086521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5568b9ada029d2268a926bbd0bb1df5f7c14c62d48db83a837d68d30659dcb76. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZFZ52051670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3d87c7cf362fc72f2a677a634feb82b93bb0a8bca90b2ea67b4e99f91c5f41. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ52051671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9021a554916820eab9ed165e490baa64f5b02fef6ea091b73fe65d91fb68536. 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/CAV162000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b281e90769ef3afad33df13b45f1ac6c3094b726b9f87047f03c811245b25b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CAV162000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b5de9264f21c32db0c21734657eb28327477d91bf5d9ee9c4b49bdd6697319. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CAV162100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee651a9a266f313a9c0402055e218ceced161a0c5871664137d97dc7ff22f5d. 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/QZRP42283901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53800b82029d214a3bfba7010e748579a575938c3cc1ce2c60bd2c34db26235c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6F2388536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc7527a2c61b14cc637aa57c752ee2fcd773703a2b45d71883218387286b57b. 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/QZNWX2333239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81981136343856f7b2d1221455bd2e997c7c75aecb87827e41df50a5365d4c7e. 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/QZTAX2305047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0723ce1f0985943235c454650278cdb1bb56a329836c584dbe09450234c42d. 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/QZTAX2305048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78607d966350e0454f8a9f7a80167ed6ac72a71ac54f7e02c9ff2c1dbafaeb32. 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/QZZ7W2421361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a9cec71b375015d3f4c14464391762ac452e585b38a5fd93aa2a47afc28d88. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:54Z), 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/QZPLS2588033.