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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea95fd63756dd7421454544638e70cf6f88c3013cba751cbf1130eeff1bd92d. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dd58c0f-8faa-42ef-b4dc-b10cd8947852.json and https://artists.proofprofile.net/proofs/artist/4dd58c0f-8faa-42ef-b4dc-b10cd8947852.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab75b483d8a290e9eaa10f81ffe48509460269c8fd43f1b911d5a9062343a5bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZW9L2325629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22745812997a9aa35203cd89d1f228f566a6e40032a69b06461677175990ee5. 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/GBWUL2400336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2d87497a061dd6eb8f0c0999429142492cb4e0e19ebd7e0ab47f4555593155. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBWUL2400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6de17bb6c1078a2c5e1cc366c649581b73fdedff50bf31be800049748023ab. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBWUL2400308.
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 0xd296093466f4532f059573e0082f1e74ae3ea6d85a413b463bfa486bab992e97. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBWUL2400317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59e1dca2c32dc0503fe6f91ef59db1411e6ff20153e624d90fbcdc2077c0b0d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBWUL2400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42a6c0b15f96b05d6aa2f90384eb0ddc3e6cb33feb8c6c3f0e694f8fb369425. 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/GBWUL2400318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206284e38e6ccab764380bf4472e75164324fcac9a6e1cf5c41ff3ce86877611. 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/QZNJW2301041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55b2cee91c3083a8938980375fa9ccb9917762bdab135ac3caf48d87e05462a. 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/QZMZ92407435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6462abdd557f37403f10761930d3c59e92a1e0110abe88454e344f5f35e2181. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92407440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a91c16a1213b58e9c7ab9fbf62bfb064e7924c5f7bd5b37d495a5c75d9318e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZMZ92407434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b336dbbe71dd3109e81e4a0a2668e6dce13bf3fb349a881bd7b106fd4180fd. 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/QZWDE2406848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3712013c5970933eae4f2ab78a9ddb1c2598a0afe9e6f2febaeb4273bce6eb4b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWDE2406875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d84cbeac9751dba81d2d6ce9cf16861bdcccaeaa8874a983f5aa5d8fe47fca. 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/QZWDE2406953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa760d34cfecbcf845bf5cd69ec47d49c203e19dd4ba3ab71638b66fb4aa0c07e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDE2406986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d6dbb910f46f9bc2e221180cc719c978395a02d0eeb77c433204f91b887fdb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDE2407036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ea0995898d9e965e8c180e3362bfe0db8170835621baed58bdb438e9d04e9d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWDE2407061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779bd5d7a42fb415147e84f3c79e0461dbf011cffb222333721adfb526ecc1c4. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZWDE2406846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423301da5813f13c817c55392c99142e0dc1641dd27632145860e448f938e81b. 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/QZZ8B2392097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97db9f9bb2cc973b3f7681bc461c582bac8b64e05c076a5786103f75512e3ff. 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/USLZJ2394527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c23eae47cc38a2aa4af5441b7f998c51d735d326adaef39000586e61ab7cba. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USLZJ2367117.