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 0x4c91d43f1437a506429d82c4889874fc810af4dd11345e39f6764726e73462d7. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a63d1d0-0dca-4363-93f2-058762e9176b.json and https://artists.proofprofile.net/proofs/artist/4a63d1d0-0dca-4363-93f2-058762e9176b.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 0x9ea4ad854e46cbf7dc7db0c1074c9671a96193327c1798efa24e172c6e2256d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3441000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881a3c28ba814d9fdb239aee5cae3f9ddadd1f44c8655d4a8120b51663a0797e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US3441000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cef7b838a8a62f1119f66673672d0b5f56f83a26c2b8b1bef14a8ed7b64d7a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3441000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95ee7e263ca3a43286a1efb6bb72b36c5d9775477aae13b1109201b025e0b9b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US3441000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0e6419b2706f2b880796dc9c7397b83ebe0cb2d50ec325ef2be3d473103400. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US3441000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8045f9bd4cbf16de841cdaaca42ad8ff89fda8c27ec47fd65686a852bc6f251. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US3441000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19c9b1195ad0c5c1e83d31e3c4a93183d79f4b1e5bcc93c9b27a8b3a002baeb. 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/US3441000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8209a62a6b0c605ca3400d37b621da6e9e4b34cbd7c04c4503aeb4b4841f805. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:30:54Z), 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/US3441000203.
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 0xf377ffc285955d68088f9f0c1bc38721a359b3c0c764da8b8e62fe630c6723af. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US3441000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf6aa85bd9775d992ec39202f190329581f348d7a0940403b0ace0629be4101. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US3441000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78efdeffec88b5d70dff81ec02ecfcf0e1b42be9ca8b371c2a3c6754bbc364f0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US3441000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c17e54c72dc06e937ce5e9d4c0fa666698dafaeac2fec5fe0f0337f266e7be. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US3441000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4a2dfaf8de8a2d23a48cbbe6b1546bf8538f32652e3f4f34119e64b0d8f2bf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAHD2332545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c25eb654986fbd0f30eb510e347e90af0a704bbd0e96e51b7bfbf44b766f59d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACX1753355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dedf7166c7e8964076b3897a6573d65844862d52c6e3af16d24a0d79003146. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3441101701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc20070423491d8548d36b79e09021c320cf21d746dc7f0d455fc5f160767e7e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US3441101702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cf6998875c0535ad0ac21a0951d2f8531aee7a9ad32e30f25534f282857ba6. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/US3441101703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142a4df6a53b684631480475253fa58a8381ea95975c87fa56e0cb822b032ee8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US3441101704.