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 0x00a6c182b7bfbfb980d47bdc49c612ee8d21032d3be777d68879428b52cfa477. 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/ca7dc4ab-337f-4893-9c97-c49bcab97bb7.json and https://artists.proofprofile.net/proofs/artist/ca7dc4ab-337f-4893-9c97-c49bcab97bb7.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 0xf1f5bd0cb96007bfab38be7d3d0512fdd85e6fd61412116197d7f5c273de7b71. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBSMU7740283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebf229e3f2fc14a3e483f8953f45f9495399f9d122e10e8cbb278f8ffc8ecb4. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:02:25Z), 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/GBSMU7740285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826ddea1b0b42f57b73020a8bdc0e7aff13e4b1eb38fbd34970f2e39d52c7f6e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:36:41Z), 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/QZGLM2127947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28de4388bd4baea5904b815e59659a7350206842d81ab444dceed0eeb14e1c2d. 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/QZGLM2127948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6575da41bae0c9fd9c80fec682bb210b70dfbd8180be55350b593e639ffee6cb. 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/QZGLM2127952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab157e5f21799a8478c60579ec561c4a6f9f2b54ce26cc7e665d68504d0b9297. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:20Z), 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/QZGLM2127959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0441e00d149ab731f264b4144a5e789a2c8778a0519ee3fdc95b80446db9540. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:42:24Z), 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/GBSMU7740648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f9e5fe94922f542454c9280b5ea623300211b32d6731d2500c9ab49fe3a7c5. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GBSMU7740649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104d71227bcae05698f44a7e52dbd0e20ae0bb52e5bc4ea62aa9e1a5311961e7. 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/GBSMU7740651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859802ab32a42cada06863bce3ac871c00905243d73efaf833b6136eeccbb05d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBSMU7740652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0488ef134530a83f469d33b2302e493fbb531051d16d0f59d93687275db56c. 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/GBSMU7740656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e7304b277193c7431e64f0ef44683c3cc6c434fe38666c8b3e91e0f1269285. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:01:31Z), 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/QZTPX2345847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3698b8e0ee483b07c931c42237bea9ccc566c91ecbc4e36e8b4a4573559c60ac. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/AR3ZG2400430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48224309dce8db4af9de9b77f218a52cc5f148cc833ee86548f1e4bf072706f9. 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/AR3ZG2400427.