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 0xf23d94c8b473fbd0873d840ac2b4c6f960c784d6e300f77e951824101ce7ab2b. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01a39dd4-a07c-4908-8483-1f328846514c.json and https://artists.proofprofile.net/proofs/artist/01a39dd4-a07c-4908-8483-1f328846514c.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 0x92787037db86581b67b50e0b7b5cc3716f407d74da1b1fa96d4f711654a4fd30. 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/AUN9Y2500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ebb104e755aecfbd5bd658e387560ec4dbd39d72f65f8ff68a9143cc705d7f. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/AUN9Y2500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b3d8a95d23a8f650605220bbd345963ee9516066820f335594208020c88234. 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/QZDA42551304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da7a7eeb09042cfb9124756f98f896179f260f7784ea9fb3e2b8cf43bfdcd0c. 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/QZDA42551337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2bb8450ab3e62149cc9e6cbfd294c7a8413d7425774d3fd286e439564eab52. 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/QZDA42551301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605edffa89007c90299ec8fc8f1d29e578f65767585e989281bd51a30b60a4f2. 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/QZDA42551257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32948a87885c3206e870ae997c16db398e406139f53ac3eb94802f4e87a61e9c. 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/AUN9Y2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ec0de5303d18140e89a1802060729463aae5a140297ffab7ef5b4ef146239a. 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/QZTBC2412131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2404a1b92ba14ae0bdb5b58d1023d0844cc7764470d0be1de64858459757a439. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/AUXN22455044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0d9bc4c759376b26246ef829e9133b171038335911ea1af863ecb8686ea98d. 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/GBKQU2380410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf819c57cff04f9706ba0cbb8e0996d91ad7faa209b76066cd5a67868e51b5bb5. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/GBKQU2380412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f350913f67aac9285bd8bcdad739984db2ba8ba3df4da9ad6b9c59680729ec. 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/GBKQU2389099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69d76098fb71605b163af0fc9e8c0e453ade0df5d4938868f34458dae39947b. 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/AUNV02201105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e749a5ff43c4c28820962e7f5c24c1c6c2031649ad5c278efb0e1a0168fd31. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/AUNV02100203.
Nothing But... Pure Jackin' House, Vol. 30