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 0x9fbcc9ef939d4f181e493e137f37bb90a3f1e899970814e765b1877ae4b8c55a. 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/d6ce4297-ec3b-44a8-927e-a35bd350d054.json and https://artists.proofprofile.net/proofs/artist/d6ce4297-ec3b-44a8-927e-a35bd350d054.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 0x6aa01e6fb419f9d8a8538822ccb8e28715becca4a804cc8444f7ad380f5564cb. Chain 2 (Bitcoin): anchored in block 957210 (2026-07-08T18:28:05Z), 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/HKG732281113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb222f59a65243b487def73184d42008b3bd9a84fc83b3163dfc1db872f6ef83. 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/HKG732009707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c0a867b7920abbb84a824c87f8ea455440eae1825b3fbad577809438fd310d. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/HKG731698140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c3624619064748d8d87f3316667578644f220b91a6d0f9cc3099577870dd37. 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/HKG731670835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28db6d60a7b17c40fb3378b4c82bc60a8d2b5f566cd68029ed1a63b02f266b6f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HKG732313283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445fc663f0dc6435b821a99923e4f7076d14dcec636da4ae5ad76eae40f04f42. 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/FRX762571816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2d0adc3ba929f12c0e1a40799fd767f822a171ba0cafe09a8ca49a90032a60. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKG732523191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e65d279b6dc6b34b491c4349bd7fd21fd973902f95e628735b1cf52b9eac88. 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/HKG732513667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0251c088f85aa40ad8a7de5988abb59195cbaa8baa1b1b37e397eaa6c718f78. 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/HKG732513668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0543be28a3d9527504f419702fd941bb12a2be1e1edf97f5f7bc8b00d236fa0a. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/HKG732513669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c05e9d9f814e491589ac61f80e17d7ab5585dda8424f56bd805d92a0384afd. 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/HKG732495049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60feefae45dc38db39816b53dcf043df86e93438b825ecb4c6fad93bab323d3d. 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/HKG732492948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e049edeaf71ee54c28fe6a0c2612b6c2fbf148e5a252a1f2e2889d6eb1a20b2. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/HKD012343768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868c698a968db90e6e35456a45a96b009ed99ff1a98fcaedc63f6d88ea3f02b6. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/HKG732423250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe697c166960e48e2261d4c885c376331326c146bb6f864f1e2e4c66ca6581f. 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/HKD012301193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d9e1480a71e7b173fa012149010fa8510c09553bf2e0669bc1c3c0c7d71be4. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/HKG731684972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46242d83b7354df87db1aed0c150a7f62166d9b2420f7f78c32a632f61c98e4. 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/QZZ972303480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974e9fc4ab2c3583e09730a473f022f52f140dec1a1ac838f801c688d5a626d9. 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/HKG731633673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984cfbfeb46821cadde385dce06a3d834f251e01341ce95a6861e76df99d2435. 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/HKG732380681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa007dda94a496b36f766123e87cf3ea2bcb68f30c40c8f4d10d6f464c46fa162. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKG732380682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69bd150672c2dc529c1f6811d734803450ccdedd288b1b8e08ea5c20f685a49. 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/HKG732292646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8fd2ea7fd02814275e534cf0632fff904793265773100249852434305828bc. 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/HKG732292148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ecd30626c9d3be7ab96631651491c88134a1263d7901a87240f9554c569847. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/HKG732290652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f657331381b8382c7d8eadafb04f88a6bdd5291ea242b0b33ba8a720b25c89a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWDL72204446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826ea59a9309e439b290e8c4f4e4f1fb9237ae024bc687bf6cc29350dad144e1. 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/TWAV12200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0345e87b2fb2207bc1f77058179426b45cec07353501330201361723b2188d. 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/HKG732421637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a059d34785445004ac929b91a05e1cd9a7d02cafa70d707ed2e81e236fac09. 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/TWD252200244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcee64b0d23e546c2651b880798281b80af8383f141d0b02bd0d30e3b5ce33a. 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/HKG731656956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5fbd2f2b08bd1c5fa5586e1a441011eda41a6fb34e2bb3ded926b107215e75. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TWAV12200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cae0b09664b732392c0aafba81db1824d235862446a5712faa470ddef96edc8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKG731858225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2863346714f824ad344cf9b095570eb77edd0c4a38645c6181395d70f8ffc770. 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/HKG732118659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9c7451a32f94b5fa6450f745a3231ae790fb22b145e0aa63ced5b6ae759270. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/HKG731616930.