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 0x93b82ea3589934213b4c251592d210824a3ee1fcebd91dd960d3122318a076c1. 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/d2318705-75b4-40dc-8cda-80eda155853d.json and https://artists.proofprofile.net/proofs/artist/d2318705-75b4-40dc-8cda-80eda155853d.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 0x9b8c9dc56b91a954f723042895b7096fc9d4db1de207cef0a0802ea8c44d690f. 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/SE6XX2306698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288e2a5f9ad43ec46acb3261a67ffcf39159c277968d034f30178867b2294b19. 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/SE6SA2303149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01658cf64805026d857d6afc1a6ebc513049f9c26cc4a34470a9455b49b928dc. 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/SE6XY2324574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a8a11954e6537ac233f344c0b4d46938fe4a85d916c752d9e379442c22c13e. 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/SE5752310243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4407fc963b40963575379661d5da0bd5c9c3c0e3c38134b562597c6551bf6417. 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/SE6I32225474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22db3ad537f6b23c74d9580717b0e40b88c467023d23ae925445270df12f3e90. 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/SE6HN2269825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558ee9a1caa5b32f8f84d8604a3231600b24ad6da795aa6dd7240d0aacdc6a4d. 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/SE6XY2130044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34ac0d5e096e022c59842cfe0e2e13a9290d5199f5ebbbb469d61baf6464035. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6SA2114135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81848b530a6222f49e623c2d13879cb25c256ceb60bee4b1c1dde0e9760cff59. 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/SE6HN2165178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8ded535e63ec554c4bd05175da572c44326c29a00d3c07b7eb8111e59140b1. 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/SE6A92146706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b06cdacec957f57577b3562f7eb7f3fcd63bfcfa224faea36c6259981cd2937. 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/SE5752149853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8115b0e32ff4ac4792e24fe7b73c5d250d7c862080d8fda81f3fe538abe514c8. 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/SE6TI2013713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd599866d3d3004031a7606de0210dd8931337fb47877521bf496388fd9d81b. 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/SE5BU2087366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe940af34c9d0179f1d01f08b6495d6272c4d00926db2aef9c31b78d3fae6fe44. 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/SE5752077149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ac50a72a3e49aa7af383373a96a016a5a97ad14f129327739946b9ece20a09. 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/SE6I32081746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee842ea7db8301ee2b3fe50dcd1781d39e86583a5970d33008fab6886ddb0f8. 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/SE6HN2077832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6446c06a64be36b255582e33115ecd52e1c5773f4ebf07e136636b0c8c99a53. 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/SE5752017191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14db2e7d3a23fc94bcd9d5d8d8fb7a24c5b8982c4ec2de78da9a77840f07b9c3. 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/SE5BU2041862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6b504c6f35fd0529cf0ee76318e35442e0aaeba8bc4470ca6fa30c81a5a5da. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6QE2066664.