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 0xff24f58fdf1e2d30ed28cf0f5b0fb4e88f4a8e5789f42a8513b3f4dc3127456e. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd8c364a-eedb-483b-ba4e-6d32fe10bdaf.json and https://artists.proofprofile.net/proofs/artist/dd8c364a-eedb-483b-ba4e-6d32fe10bdaf.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 0x2a54b473bd8f6f6714f5734e62cb367a3894ed7350ea1ad578f53bacd25338a7. 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/QZZ7R2414311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a3790e7b598f436f57c98b8382b6b6e1ed54477243f860a75a0729e512310b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZ7T2436199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc26025373dca5b9f09b5285b1389006596f1ae58e7af0e45a2f67c6d72ab6f. 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/QZES82580562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f57996c85753eb3fc58a1d7e35c3597c48ed42d201be5c017b1b1bcb7512d7b. 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/QZHNA2515001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4885a4d4164717b7333a4c9879462ed60f6232b2b5f4232e32959d2948956b. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTB62503379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee937c4a5e9adfe71e24c4070f640008521c0e8fda40a34cd287c8bf08a67d7e. 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/QZTAX2465130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82b9a44913ecfd035e80fe1a7ab04ceb0db2b5943517dc7457d2279991e082d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB62544167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c2b17ee1eafc75b1c70520f07ec112f840fb51eaa043315b79d4ec707eddb2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFU2590446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bcf26a4fb20d95c3de0ce2068ea1118cd4954073c839e1a26084c27b3c79e5. 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/QZWFU2590447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ece4ac95e770c87c52a3cd35f0ec864231dc4246a0bb827dc0178154901c68. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZWFU2590448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e8afd8eddb0efa7033f0b9b5091466e3ebdedd768b033186d15882b67b531d. 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/QZWFU2590449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a4a647b9d36759816a2e1446aa4944011bf672b551d0ef09afd810724d1d65. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFU2590450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cc30fccd77fdcab8297050aeb9717d89e4fc8a69a5f8aa3a4707d4857b27ec. 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/QZWFU2590451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0bcb257b191630fcd2da90b9c72ef307757c948dddb44ad79f7b1054f777fe. 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/QZWFU2590452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12204617953a503e701e6e4e211fed2853c1d87e0652b4843b328cdb66592e93. 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/QZWFU2590453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859bda7198b72ed2ece9df269596ecbf63b3c70dade90a0f956e0b3559b90efc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZWFU2590454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d68056ad4f3d55ddcf499da2a0c3a9eab81b43b1b486e9358efe7ec5d3f0f3. 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/QZWFU2590455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf411e308c4190694eb8a163206cb1e598b45e46bfcdda412e2bd9341e369db0e. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZWFU2590456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e0604774edd900d0152b6579ea7dce255f87de07cb5b68fb551d187efe36ea. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZPLR2510887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e80e2d233e5238443529915df13643857cc0897ae17c9b95c8ba4c9832cd52f. 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/QZWFU2590457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac547c7160828020a9f19c18ec088627cc5dcfda62bfbe6f82c2d2d33314648. 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/QZZ7U2598993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e92fc41af5edd68414cbb1d582ca202a6bc4e0be8278b71cb8a47f8156b938. 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/QZZ7U2593529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fa973848ac1d658bbb4cca3d14d4ad0818055cdea4d8699ff1047b921bc529. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QT3F72526341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9f3b00677d2c0de63757ae19d92bb1f165dfae4c0bd073d4ec30c1eccf6a6e. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QT3FE2539134.