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 0xf269e98eab1c7486c6b42617d663617bef731dc3dcd1a6f84041269c23f58c99. 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/08baf792-4fe9-4663-a4ae-2be227e36eb9.json and https://artists.proofprofile.net/proofs/artist/08baf792-4fe9-4663-a4ae-2be227e36eb9.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 0xe42e5d20e4669e59934ca1e7cdf4f125a8dd409dc4283b5bc361ceda31668abe. 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/BXV602100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a02bd01b20ac58e33c9b4fc74a7ff2dac727ed54bea28707abbf211c0cca4b. 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/BXV602100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488d7accae1fafce73ebe7ea9da7808f558335b1fe2a33657f46b7f8b2619a29. 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/BXV602100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06756e47e8fabf3739b29754f4e5eb603fe92e11a2283f2a956cba97065d11c4. 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/BXV602100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ffc7dcc92d1f41a58ef660211c86e1194abec217efa09a2c301f8fc207e9ca. 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/BXV602100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc3a922125b271de0fddac09401a680d59a0eec8600c07ae9ac10f0364bd9cc. 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/BXV602100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65158ae4e8ef9c4ada140cee6b32015e6d0546cd5b04685ec49f422ce99fa06. 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/BXV602100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cc51d10b416dd50540c481a3dad4f7a1a3a77a921f3cc3a7290f56795de27b. 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/BXV602100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf067f845f14308532874ea364f290bb2a6dfff5d144d393b72a8b2cc31585560. 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/BXV602100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010ec2f50aa7d70dce43a3a7eee16502e521dd341a248aa08fac0c1e207416e3. 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/BXV602100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52c75ea3c889b248b0894b91a3739a480468de9462473c43945b3aa9aa9c1d1. 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/BXV602100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3cc2c27e6b958ba09e70a642282e07e0085d05588ad95bf1dd7a3a7d7b7d43. 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/BXV602100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b06a53d8cb7a73ddbd354067e650265463858a11bed4a2a0158b8ede70cc0d. 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/BXV602100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaedb7d2372329aabe3ddf09b9260af3bbb225b648dbe1a1f53070c482acbe0e. 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/BXV602100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e260f6742389b458b6a90ac6285f9d466f22facbbcecadd8b78ff986349b68. 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/BXV602100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b51c03fa6c28942aa2d3f18726119ae06efa445e2f25d57fe22b4cd4f594f38. 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/BXV602100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3d99115230a6c3b4ef2060e3b782046d3dbce2ffe9ebe5476c011864646458. 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/BXV602100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd339cf4ef326d79eec31f4e16c3d814cb87e10ba348a9ed1c48a9232c9ba296. 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/BXV602100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc8cc824adf1d6a48e0b5c00c44bc478bdbca9ca2d4efe9f33a13c74cc1d6fa. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZGLS2076298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b96308089144b49e590bcde34c6c61870164d65ecd3355564fc9b5e90bbf67. 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/QZGLS1963703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfb9eedc0260cde4312beca6161e8256fd2f65ee822f34aa11f64c2cf22af12. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZMZ92400804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745a5d8783a4647281745927bdc5754ecaea106516aa5a576047aef9c542c5c3. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZW9K2397345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a788e7a0da9b0943805531731f907a8c51dab354b4c909e7ec3ebfb8ade8ff. 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/BXIV81600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32572b19a02a7c6f6ed0de1b427d9d95bdbad41c72bd5a7d15886b9755225c4c. 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/BXARK1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d48e7bcfcf00b10b5a0a8bcb6bfba7883db6acdf764306ae535e4f81eb58bd3. 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/BXARK1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cdaa1694f88b549e71221e9fe0b9809f032d1911e24df709021436ad9d75e1. 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/BXARK1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac5d079b042c4d755cb1f37c0a0253a13def25d92f7010ea7a8f93454ad3e57. 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/BXIV81600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae807164ae2941f79f598b48fdae40f74342c5a1f95ecd33044fddd5a48e3ec. 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/BRIMU1700354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31df5f542601686928cc173038907aa6e4cfc121580dd8a477bd472a9146f26. 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/QZNJV2306157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cad150c3a75e0a97c411b0570f4e019846838503c1da354998860b14c1465d5. 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/QZW9L2236259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f076fae487d983eb2d34f83620c44d422ab149b4fd1741c9953a0535f526af. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/BRIMU1703325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4714a5dafab464be99f4ed4f1d952d447c575b08c4a434967656c4c1ffef8c68. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BRIMU1702388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1bd6bd54dbd9631807314de3e101d4b72ca316689ca857f793316ad57f128c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRIMU1703836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a9fd5fb6d82e8e9245f1171b883dff0657fb8b22e08dcda7938c7cbd5801c0. 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/BRIMU1701081.