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 0xd624566e25c9e64444a8b5018e2244b8eccd0663bef26fc4157b00f389bdf04b. 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/5c3757eb-36d8-476b-b915-6b42814493ac.json and https://artists.proofprofile.net/proofs/artist/5c3757eb-36d8-476b-b915-6b42814493ac.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 0xf472c3da1432098e580ed6322bd191f75e1363ebcfb87fc95c3ae9e1ce6591f2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX452138399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bf5185797959d428e38e5f37f4e8df60d86a6a5740843786f4061de9260a6a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FRX452138405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230c561db34cd5284d2920674cc7e41fcf25f788688e95d8403ca313bbb868fb. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/FRX452138409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa441e7ebd43a980d3cdc4c3260e3e4f314c6a68f50c58d668738b9f729a357c2. 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/FRX452138410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2560b4d177f79590c0e087ff1f569b46823821395d2ad6f7077173ce4d7396. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX452138412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c593255a65a329dd61f810d7a68ccb90cb79b98aa8aace1d839a42d85e9153. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX452138413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96846bae4b47bd947d8e5baffd42115c86840e25dad00fac4c19ec3d59f41ab. 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/FRX452138414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bf5185797959d428e38e5f37f4e8df60d86a6a5740843786f4061de9260a6a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FRX452138405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa441e7ebd43a980d3cdc4c3260e3e4f314c6a68f50c58d668738b9f729a357c2. 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/FRX452138410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c593255a65a329dd61f810d7a68ccb90cb79b98aa8aace1d839a42d85e9153. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX452138413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96846bae4b47bd947d8e5baffd42115c86840e25dad00fac4c19ec3d59f41ab. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX452138414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e48a7de0b46e4cdd5075c82d474d9ee31b2f45e5414e5375ec084632e49876. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FRX202031169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb1a09f5db80376d9eb0c0d1b584b16f69ef589d0c464acc843e0f4148576d1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DGA052017700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaa6fb5f5ee234e5c302e0086472b1d241a2125e18d45dac829ca1d4bfa1bfc. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FRX762111693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8c641ef9673e28fa1cf41c2adf2db06806e25d0ea19e9d9d3fc4f3ed09602a. 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/FRX452194439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e503d4cc4cbe6e93f09b0902bfd8dc6aa5f31bef8348b7279474f6a7773bac3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX452194440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5348385f7c6680bc82d8d1ee7a9239940f64542562de17cae909b779f5bb80f0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX452194441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909cfc553b00e3878bab18ad9aa793903f8382babcc17ff99def05dff0082303. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FRX452194442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534aef7dd5819229b9da6c4eedc2a37382c86c0b6231731c3bdea556fc00f0e4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX452194452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd493aef2aeaf10b1955ccbebcc4ded3baf681c4f4f5f56922b26a15dac8c5f83. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/DGA072266361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9ae1a0e88d9b6ee25050d7bb5246315f80ef907dcfc5bb4ed2a31888d1422e. 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/FR10S2372957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8d08a758c7386d16d113a5eb12c0f700ddea00c84058b854829921a6ae582b. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/FRX202414101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea741093605b440b779de6e0354997be7af68b5d3aa343c2c5ad3c635614e362. 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/FRX202414102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b1b36e4fa9e3c5aae449150a4c95de32bd79e791ed743ca4af0e32e6632af0. 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/FRX202414103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6b5b02a6854950d866df28c1bb1b14f23890705d9c6d76e4c6f4bc83e15751. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FRX202414105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e26c77354b44a21237d8f35d073b5a58a300ce7f4926078709d71c78b0714a5. 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/FRX202414106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8baf2907861b5c55fa61d357fed608120365d555913f23e4e94c4b504c7304. 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/FRX202414108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed200b9070fec3ba13c0c36545b1ada23ab18415b7e35aab0124b30970cac96. 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/FRX202414110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb084611616c18bf86434556b333a41fc704c0605cd49671b5fbd4d11d98f72. 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/FRX202414112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd77cb08611c360a91c4031784dd14005cea90ea6f2172a6318a6db4981c566. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/FRX202414114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57903c5d7a96203343b1b46f91feda0e46af49f2ca634a982c9ed8bda5f2987c. 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/TGA091900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920cc40708330db0ee9083e14b9ddf6f4ee7bbc2e202adaa1cea9322a8bf7466. 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/FRX762022954.