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 0x58e2cea9740d4918ba7634cc5a79832ed2b365efc24d635394592c69323da8a9. 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/99b0a748-732b-49b1-a8fa-40883aee0241.json and https://artists.proofprofile.net/proofs/artist/99b0a748-732b-49b1-a8fa-40883aee0241.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 0x6ef9e602912633aa4b742759e88ba379e13e56647d157de7953a7afc17582d73. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES50A2200447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e7e9afc38b1eb2f09b53944d2ab1ac789d0c0b8b3969b062da763588f38dfa. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ES50A2200488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe774576a9dc0a4a4d890b3de9afab823314c08bf544dac630f8310c097ef2893. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES50A2200717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92306ce2105544e4d4dd556646f7429d8809ce1abe1f9d8b1881fd7b4cc1309. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES50A2200917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c518764b482b6a83dc11bc1b2f3fce4071294487228638c245638bea121d52. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:18:56Z), 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/ES50A2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f09639bf62d9e8d53b3963b7328891865e8649ae9d19b3ba9b8db2d1d3bb23. 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/ES50A2300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced1a1f2e71093f34d292a54fa0b6754e090e9e4c2706819d09940736afea161. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES50A2300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9954dcdb8f8e46334d38587b1bb0fbe4494439c2a0c6bdec2bd1f875dde5ba9b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES50A2300418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee94876f895895de525c28054d63dc9bb531c7022e737b4b95beaf29128a0c3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ES50A2300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a722ce7743078ff2b104244dff587b47d6a35a9ba5d3c50d9dd8893a9823c84. 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/ES50A2400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dfc1735005164c46bb770bf9b775040087b0a2fb55270e3d0aa4dec93a7bd5. 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/ES50A2400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbb18dceabe2a38fbaf26c98c9120d815a8ca4ea9b7136ff692a9569dfc7907. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ES50A2400320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd36c630925b62b189c4e4311b0df510c2fad45c6706be4312dcfbd5dab0ccaf. 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/ES50A2400322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72955b55b3bc4660ad5d377c4e1e400b84b041352af6168e8a4582c02eac48a5. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ES50A2400528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdac2e3d290b6d16a85545a75cdd3e9e1c919cc8a447f31b9c0acf5389fb90d. 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/ES50A2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362e72f0ef1b6b651ec6cff7beaba50627376c9b8792a513ba54b264ec430c9d. 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/ES50A2500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bca6d5265575b759fec3705ecaaf683fae4f7f2ffc0b030a4dc0215ca3d4e2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES50A2500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db4885081c5724d5e7173d9df1b7d013ef62e9704aea5e2b2fc648ce649d4a7. 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/ES50A2500359.