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 0x4bb6d473cd5fcfe03567718f8e9cda26a586ecb605096ada885ef2b2c5205a5e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/739be7e6-0656-4c46-9efe-5d42fb2f2f00.json and https://artists.proofprofile.net/proofs/artist/739be7e6-0656-4c46-9efe-5d42fb2f2f00.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 0xcaf23a88ff12fe5ca157952efe353c9199239645897e93f36d4ccad877bfa89c. 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/BXBGP2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6ef6cec7b89b0337c8bb986ba03b600e19248e00e20c4ae7b3d245b2facef5. 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/BXBGP2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10457625550b68b783dac9c780432ff7c6b6912256b4d18e1ad5e4b9eb1497db. 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/BCEEG2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4202833980c01fa81e488f5a76937debc690852fe98593752a7405264dde9c6e. 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/BCEEG2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820590d6389cc6723961e17c877a3d697a94d5f734d77a0e4fe62517398d754b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BCTVC2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e158a1983b1424044f91408015a954e595355c44ea04f74d8a18e146b7cfc7. 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/BXWMU2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067ff90ea1f569aaf41292d312f4c8bfb6dc08e19800752beed06785e5402a2d. 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/BXWMU2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11abb6d531a501b85c160d4e86315ec08a761bc7c359f311b8f36eb9c56fcb42. 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/BCTVC2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6f00259f237e891bb759fb5a9d75a3c367605f0babf90a8ede701306f0c329. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCTVC2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820590d6389cc6723961e17c877a3d697a94d5f734d77a0e4fe62517398d754b. 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/BCTVC2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6f00259f237e891bb759fb5a9d75a3c367605f0babf90a8ede701306f0c329. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BCTVC2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb0b061b9b63b96aac6fa374fd074aa73070b03a41880c0c1a9986b7fdf2ec7. 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/BCQAL2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe51efa5680580997042fe8a081aeaa3cfab35ad4c2e1789a241ba92c7d544bb. 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/BX32F1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246af3321656ffed4a1bc0a309cc7d6bd6108889ac25a31fea2b89caa714607. 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/QZHZ42086652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e81d5bb240c3d1672d19522b47cb76687b1e35a0a6e59250291671d612ef82. 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/BCE7P2403404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58cec16f5c9e359173b4bbf11be77af8082aa487ef6c9423f1d2ed7080ae025. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BX4IU2500381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172a8dc2aa27d1fcda14f3c53901250ebd5c9eb9e91fd621fae708fa291edaa6. 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/BCE7P2301816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a3d5229dad79eb6b56ca740c329f7b78a6087f053d1ddcf34fe5bbfd9e07c6. 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/BXBGP2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5d50b46dd54ee71328e435bb3bfeaacab0e35fe323bede2c79f7a7d3d0c3de. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BX32F1900026.
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