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 0xe6454571e85eafe0d08df292d74a4ec897781ddccb7e4f3479243caa7ab8f788. 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/f2dfe7fe-1bac-42cc-813a-0e701d2c138b.json and https://artists.proofprofile.net/proofs/artist/f2dfe7fe-1bac-42cc-813a-0e701d2c138b.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 0x7722a16a08ed6d777ccf4b46549bc8e189b7d5b1e3a829f8efb57dc8baacf788. 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/FRX202239321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4642599e0fe50e4539c616d7b7e4dafd1babb5683de94b4fa273203d3d23a0f6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX872234825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d60c133ed8b8a877a0b4e8ed58d00b6f4943d47fd5e6cedf519d82aa153d1b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX202367473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97e59c6d6448b31a407fafe3599d3fd30d323ad30637e7a6b2cb0872545ba86. 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/FR59R2286220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d991e0d8c8e8c40e7d63a8c54fb0cc08026abf181803df52c80f0985c7620dc. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DGA062374055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dc495699575e5f1f80764a304b3b519a09856e32325567f24241acf541c1f3. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/FR2X42400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ac55ad78e268c7f44ebf359b2e105561bb480ccd8a84030d0ce3645b63c0e4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/RUAGV2401520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa798ac222542e4adc2ca07b6abc094959b2f4907b1aa263968cc47b9ef7cfd0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/RUAGV2403086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6cd17b5f43aa8e8d87adcce1ce6adfc4ba04c3575dad073945a027f4e7a669. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUAGV2403669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84c0d2cf53f9e1885b8070cf7ae820282ddf6d0bf128ce47890e6fa134abe3f. 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/RUAGV2406064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e2f596437c2cfbb57d4b2e3dca75db94d045cefc1f29b35fc5b9fa1ac8a22. 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/DGA0H2469969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc34dc76259f1635b613f5758eaa3232697f6f21bb379be0b66935a05c6228e6. 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/DGA0L2457533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3f980ca3b1dfa78ce9a088d5950d72483696d22f33d5f431cff9ff0c2ce28a. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/DGA0P2435859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b95fa90cd6b21e54a9eb89b10a833d71955e77322996b26cdce05627e7a8c10. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA0P2435835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b37063e16ebd3ba5c45543fd1b5d82b911c028a58474f7143eba364899797a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0P2435847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1791f046b96b108a68e18f5953f4b3a4ca95812ef0af465073f6bab9f4bd30. 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/RUAGV2505725.