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 0xb97926ee16d075d0783c0d62b869ca196c790efd1ce3656cfd1c9e9c32c64864. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ece87ed7-b4bd-486f-9546-9fdb47a0702b.json and https://artists.proofprofile.net/proofs/artist/ece87ed7-b4bd-486f-9546-9fdb47a0702b.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 0x5d38acd87d7c85cbbb74391061dbb8ba30a47f0a387af3b7d786f2640b37ee97. 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/QT65X2589245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecca6c6ae2c7b8cf2d979fb120c42bcc67b86f4e6565c633bb34f8c35425d7e. 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/QT65X2589262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5711cad994486384faaaf363f54ccf670f4006c36bf68928a6f7e13bee84056. 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/QT65X2589276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7405a1730cc4925755e5f1612cf8ffff573d5e76b8c186a357ae6d8d9f8e544b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT65X2589288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597846cb4ed0b116d8810ed6604097390856cebde691a6e393a40db0dbb35136. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT65X2589296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f55493f283123f72c6de502887b0c3a97d0a67520e5c324c6ee9479fd218ee. 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/QT65X2589307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5111590c90e8f1afe86ec37e5464a8f9d150cae262f6e445f5eae536ff9068a4. 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/QT65X2589311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90afe1bda2e99258e9fe885d1eaa17f2eec2c987502cafff97ab25fb356b8004. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT65X2589317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e9daf540911e0b81a6651ec3ffc6ab34d35c0c1d49595d4ce245dfc8348859. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QT65X2589328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7cd52f19fe5bcffd9852a03c05eac0b59c89b04eff74c7c660b0b83ed452ef. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QT65X2589341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77755d4905ad4992eb348caa151e172a3600b08c20885cf9b41d2e60ea5b93ee. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT65X2589345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90b052d0fd15bbec505cdae9b81c9d1c24d2f67a94a531bffc71c88cd9d18d7. 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/QT65X2589347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a82df5b641ec1998f8262eb019124699d85e80e86af35eba0c91a882715940. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT65X2589356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f948831b0fa5e559eeb7a784d9baefb5b4a488d1776ae8b1ec74122b2e14ae. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QT65X2589365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c60f4f41971472439b83d4f8a689d60429377bde16d0679dc9b27ac40c0036. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT65Y2550923.