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 0x37f2bedda31b4b3923a24840d5bccff41c03b157b4dfa3599437066422e86f2e. 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/e81e3bf6-be24-4c34-a42c-a7c07a3690b5.json and https://artists.proofprofile.net/proofs/artist/e81e3bf6-be24-4c34-a42c-a7c07a3690b5.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 0xe128f97af915652cee2f7a31dbfd96d2202de1d3fc8609d209ff7da7fb4080d6. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/LBA0H1700750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23df5b815bb2c0332176a0578d07e171ef2426713df33af3e36ca0855b7c6cf4. 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/LBA0H1700704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00f18f22c12722a6f6b917881c52ed691015dee2f617c198fb714eeea351044. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/LBA0H1700707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a214bc61e67ada86f0bd5e0300708d2141d1230b98a587d780cbabc444e14ff. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:07:50Z), 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/LBA0H1700710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fcd70b1a2b53b0a0c0ad486edf67d6a5bb17d405fd83a3578b0eaa1ea6d899. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/LBA0H2000495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cd742ab3c40d58165709d2237df83f5f768a35f57b2378d40a323700e12f31. 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/LBA0H2000849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c71840653a30c4e5acbad3080ebf2ba62eb6a3003ee2fcb542a45dae29e44a2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:10:40Z), 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/LBA0H2001783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a72a232b67bb89ade90eb5fcbf8685f3b2a4043a0578f31b8fbbc9fea02734e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/LBA0H2004186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d332b30a9ab5724881bbc5db27606ac8fb3ae38606134b74b6666774b9a8aa. 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/LBA0H2005678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c8748c43e3e39b47f1a5b0d84e1e474f48d4bc1d15dec8021ecdcfb5abc989. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/LBA0H2006500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2671a31dc25cd2312ff8d46ed949fa53d0ecc4e0eaa9b455c980f61c04fea6ac. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/LBA0H2009579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527a19af3a72105e101c4e1e07288266cc735dd0e7d00845807cc82cebef5095. 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/LBA0H2011158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88231c3aebf8af33fd3e71dd5feb99a63fda51d2f29d468e825f6dc9af4cd8ae. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/LBA0H2011340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee6742933ccd167f9c2829cade83fbf04a6f2a17c3a66c50560a4c2df81b15e. 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/LBA0H2011647.