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 0x66f11518dfa7fbc697d653d06d5c69983b558fcfb5afc4e2ecb0509f9a044257. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/699abb69-8bca-4a76-9402-899ec306df1a.json and https://artists.proofprofile.net/proofs/artist/699abb69-8bca-4a76-9402-899ec306df1a.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 0x23a84c17c88c688de7d89aa1ca15072da94c13937bf7cca62678e2d3e83cc30d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACD1716372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9fc26de31d2cd5a7c631dcca22c5a5f5db9e5e5f652a1e30c200e2ce8aacb1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADC1716374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd288160ffd9adcd2fe883ef0de3b68c4f9175e44b3165b40a09c3c5b377542d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADC1716375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d397d21d16c36175343941774a3e9ec041589305452b870b88f41b676b26069. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADC1716377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a84330e0279225dcc020f94605d122d133b07380741a54b803e470d92c2cf3b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADC1716379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614dbbf9901e075aeb481fb23ab0fe7d2a4d3dbc29ea4697c33ccfecdcb8edee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADC1716383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbc1bdabadb3af0afc70b77eaf70e08cd76d21aa022161a839776c208d210d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADC1716385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e2b070da548ff0a7d30be5f87365118905738c9dc34ae529429d3cfc5b00a4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADC1716391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7db190ee5f297b6db358b3958c2d66e6bbc12f5198c2168593b068f644df71. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADC1716395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd299905a003ec65edc0226da7f919ba27eb164c45b4d472aa7fea523109b4c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADC1716400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a6c4563e6895305e86f587bb039aa93b76f6bb37fabf1b00dd3364e76c1ed2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADC1716404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751df3cf8cc5567c8d4885d621f44a39c690eea8e08ae31d4d1fc530df7f1680. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADC1716421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa993c2441a9a59160a5744f5b829095ced4b77e42d07a822a854b360668dfa15. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADC1716432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb9e5b27150fc035cdaaf7e14ea169766dd15adfea36d02093e68f4622a8c45. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADC1716566.