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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7f0f096fa353ff731e3108732454836ea6b4ceba88c4259636161146a3a10b. 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/d6d57ffb-9d97-4650-99c6-8d90411d2283.json and https://artists.proofprofile.net/proofs/artist/d6d57ffb-9d97-4650-99c6-8d90411d2283.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe728c4656e48410bb9ca9652cda24e5cd92f104d9b98c7a089bcc3e1a716b6f7. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GX53U2477882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150a9d7a1c7055f3de10ef31f05585732dbbe84cc675cf12d731d5f82049a443. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX53U2477884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4c350ad037313cc997b794485c1e7cdbe3e7d656443d34ea5aa7d6350a3cba. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:23Z), 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/GX53U2477885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479241150366fe983c7d794ade8d41aa82344ee0bd997df14875a301cef70419. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GX53U2477887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a509d5a57f8eea8e7b867e14ac774a9607bd3e86497fb834b9f956d7d3e2273. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GX53U2477888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9375a0f7c9576d1ffa76a55c3ce5b88762e9f39c83acbece0fab70aa933ddc8d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX53U2477890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703b159788308185c0a66a253e5976fc8064f712a5e3ce5b3e13f9c5010e95d1. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GX53U2477891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe687eada0487d45f74f41a157e5b0e68ca5a1c25867f483679203a155522def6. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GX53U2477892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4d9a8ae9be4254f2332e4afe16d6ea52a61df5aaa5ca3e8da40adf076eb1d4. 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/GX53U2477894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391a14dd96b426405266de584a542b598bc9e80b9282dece4788868839abf2de. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:59:23Z), 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/GX53U2477816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f70954362dfe6aec25ae94c588f9a57be06f50365a83c039cdd732bc0e8a27c. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GX53U2477817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316873ff9667014fac9eb88efd635ec35697158356cf07df08d0d8d428a70e12. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GX53U2477818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c9bf29d5f3394092d0e3c9e2f8532594ee45a2e7d386f62d17ce7b52cb5c95. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GX53U2477820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4eff42acbcf7273bc8a1e0ce40f36781693620c6f953b84a1a07a8f0b3281f. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/GX53U2477821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917b2069aa81b6c8017654fe05f6978131a34d9cecd9cf8484a924f3c1b03af1. 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/GX53U2477822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ba889543b408b57c5f6b2edddf93aa53014e121d19e3212ca0a73442245d85. 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/GX53U2477823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51abbd872a84ba16de5c64d099556f469778f561fc3a53ee11a72dad3ba612dd. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/GX53U2477826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae489da4453271e7e838a1efd5991a7ba080864096131186f05bfe879ee16f13. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/GX53U2477829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe63d83cd7cab260476a4aa23b26fdc7089d59e2fa6b79b9283cc22fc0ac5ab1. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GX53U2477900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21104559ecaf0f93e0b7ba1d9ac204773326c7ea26e04d71782b4a926b0c4574. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:44:14Z), 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/GX53U2477901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda95a591f94da54a27d4f1bcc78e05e1face981cc1297950bc179bef7b42701. 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/GX53U2477904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff563d81af0da8914aec3e477dc8ac58dc645150c725fcd8cd3e571318e1326. 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/GX53U2477905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c5abe6020af5ecffcaaaa157cfae804305c37da9099927c0a169991dffe1ae. 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/GX53U2477906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bccdea162f2b55b84ab0e09abd407662fd60cf9a754a17d4193078aa9d39b4c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GX53U2477912.