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 0x8c73b47093d3da1350571e154df1890f667ff9f05bbf4581f0fb98b094bd30ea. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/299e03c3-8160-4ae7-9f4f-176c2d60387b.json and https://artists.proofprofile.net/proofs/artist/299e03c3-8160-4ae7-9f4f-176c2d60387b.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 0xe9701730872be54ba54c2e9e93db2c55068ec1424a916d7277a61d7ac8873a9f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEQ021912163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c006effa1ef1a1a4ade0fbcefb597a860c192af93b3c91e1764373e8d83bd38. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/DEQ021912164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05953aaf73c2f6495343adeb943a3dbc6e756cad325fcaa14a697cbb1256063. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEQ021912165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2da01d04e0062f160c394f897d476031bc5fcaf87851d947af6dbeba6a2a52. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEQ022003917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1496b6dd6709d286b2705eb3ccad87d1ef1d4359c24baaac89c9280ec41858a6. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DEQ022004783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73215af657fd9ba637e41802c66cf0df657465d21ce8a5fddd0a6e69a1fc7639. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:25:10Z), 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/DEQ022100216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81917c7cdbbb53eab51a926f629514be027186dbf935f4b12a3e0f846de9c8a5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEQ022100220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30e016d9d75d1e130a796284da2358b64a57c8a00e7f19f8ea344bd4e15e810. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DEQ022100222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b313c5fc668ad4cff9dd6293334f27f9658be806efc3febc70868f648ab092. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEQ022100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9965bb0eba388a7eae6a856447a04a21167cad12e657a292c7d49f55ebe2faf2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH7812224321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e6777ca8c938733068de2ef900cfe7d07d79c1f250bd2cb8a6d9b7d00ce0b2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:57:07Z), 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/CH7812228648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27dfa41cb08e51228e9104e8cd5715d0e20d1d854c8c25fbc87b8dcc0a7aee1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:52:16Z), 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/CH7812351682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d34b619fb5ee696aeb9d5fd005e22ce4b58e64cbfc3777686e82471fe20287. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH7812357204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddea2ef6c6603db705257812bf715276c4fc1cedefbd6b61d986e4cbd0f6b8a1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEZC62439236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b03b24940e6b9662ee71f1ce690e8ce573be690d10b427009d890a6afe6213. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:06:45Z), 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/CH7812423130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb86c344b34498b8f6263b0ec96c19bfd084cb68a6d4ca88d7328f4a103575a. 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/DEA622000414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa860fd9be32ac60acc2b9eb590c25216be9e9ac419beff023987fcdcf61d75e6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH7812219095.
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