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 0xfbd3cb1194a630ec00543e19d6eb2a46b9f0e18bdd20ee9200a931f48ed27178. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f65817b2-4777-49bc-81a3-39c0c54fddaf.json and https://artists.proofprofile.net/proofs/artist/f65817b2-4777-49bc-81a3-39c0c54fddaf.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 0xcb87aa9736c8487f2a5fa8a177a6575ad054645c9625ec232a96e21d2c07a35e. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/LTC392300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5f17b8bf8eb4beaf2e4f20be0f009b872921d4d7e64a738c21c66676cb6f43. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/LTC392300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c6c3dce6afc89c682f72c0b0f6cff92b28b289d529471fa5504ffc4125ed24. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/LTC392300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd575faedc4c1fb9c94defc918a4bd5c77ec853317c49ba18b03fc89c212a6081. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/LTC392300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f28b0fe535408bb0e499571b2564a9ce5780521f01b45ecdf1fbf1ef5cf1df. 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/LTC392300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a32124c9af0ba0c6a998b9e446fa8d1721771eb24281ad6e459c8b2c2250d96. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/LTC392300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caaa10193a1f81b1425dede6339f9511ee124fb52245ede8e5de9aea3b7d35f. 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/LTC392400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc93265b8b49a8661b3f93f7d0064870e6922f1a87b1a4a2850b2a579a4b660e. 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/LTC392400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4e2951600c4253268815b80f8f89f014fed6cd208360e89b0998043a037b08. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/LTC392400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530e4124e6e09f331c6fe2d517860acbd584247a1c0b014e972db38d25e0d752. 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/LTC392400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c77600274da90a04998e82adbacc3e35c92f0e459870c658a6b142e19c7df3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/LTC392400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a1b707778417f43773ab1f9e42b9b25061ddf77e0691ad061f9c905c2b497d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/LTC392500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a3e18f933271269eca6bdac4328e422c4bd2af5e4c178c07a0d1b9fb26772f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/LTC392500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9fb2e8b4815ca5d7c59281ac3b9db74ac440e3115819cb63de22e8efaf709a. 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/LTC392500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4255682b35cfcd64004c1ef97ddf32b26767ac1fe6afd99458487d28827cbd85. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/LTC392500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c4c735cebf47182203dbd2aed5f91cbab845d62e01f45d28500e005d0e1ecf. 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/LTC392500030.