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 0x6bb4cb9dffa23e82ded8944f17687992151e272e9fd728ac1c18c0c981fa50bf. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c83888c-a245-4b36-b504-ab8c1aaa803d.json and https://artists.proofprofile.net/proofs/artist/6c83888c-a245-4b36-b504-ab8c1aaa803d.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 0x2c73fb167f9a95225493eb205c9a8c433f81333642cab42b870e1fc956f10a44. 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/USHM82335508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c17a941a28006354d67d584cade6cdf95ed856909c9a9da2d562792bee80e97. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:59Z), 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/USCGJ2412394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cb9377dc0fbf47d06e37b06be381afd753c4cc951c6cae4b81c348f61b19ea. 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/USDY42474290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b09f10b370d9fc377f815c787934c310c0c16350e75d72fad1fd2850e2f97d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CAENV2445707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fbc8af3728e4cacfa2b31a0f3ce9171f1fb4a4b5430a13fad0e1ca045041ab. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USL4Q2478943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c1b15cda8bfb3639423096554ec99617ea17c4281f8acb6fbfc2c2e07b7adc. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CALVP2493994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3e974adee6077580f40ae81b10c05d3d2fdb54a64b42c96e5635e7ab393655. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/CBEYJ2466102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3e974adee6077580f40ae81b10c05d3d2fdb54a64b42c96e5635e7ab393655. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CBEYJ2466102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7950c89ccc7cd0dd8362247e05770b43f92db1ae6710b1625a9a9c622662d9d. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/CACWV2595595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9020e5b1511170260783bb81f09656327ff47cf3f28c409346baacf046d35687. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/VNA092503170.