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 0x316763692f7d7c9955f485037d9f665bb56e530eaa1872205cc28363660f8ec7. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f42ed36-87c3-46c7-bd93-3fbd5578584a.json and https://artists.proofprofile.net/proofs/artist/0f42ed36-87c3-46c7-bd93-3fbd5578584a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Take Care of Yourself (Donkey of The Day)
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 0x643eda8c4fcf7e2c9794acf78a1f6f091b9cfef065068932ef9e76117cbd37d6. 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/QZDA51844261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73105b7f65fd91f0ed15fdb012b51f48a6dc9f98a992fad008604aec5aebc94a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZDA51844263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a7041340b2e335f6c1fd3964f920c685ac04ad1da396542c049a5156d7450d. 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/QZDA51844266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bbafabf27a74f85cce5804af8b78153a2007f38c15decf42dd7f0982f43e82. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZDA51844268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3d7bf8150cb5e6dca457b4e465f11924e047c0f5401c5800b28e46c2b6c8b1. 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/QZDA52238473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84de8622a4f894132091b3c01e11bb23bd87fb16cdbf6e1d3fd32df6787aaa2. 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/QZFZ62289544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc52e6b35f8e9771ce72936b8631b82f89c97f2afa03913e9d0154cdc7ebafd. 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/QZDA52238481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d0936fd9be454750e6aa1ccff7f38df9246e8c5913aaf2dbcbd818591484a4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZES61947793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ad7dc8a4aa747e70c4e34dd8e72ec21f10966fbd5db2f9b560ada88d86840d. 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/QZES61947795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9d807b67536a89d2a80223322b6009caefcdc5bd1a90c1f601fd35df3a0708. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZES61947798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbab901bce418a61a3a2e3decd9b39a7fdeee4cc9a6c59205bd17c5f532dcbe. 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/QZDA72184464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14735d13935e118f1b377c9fdb4e92cbbc2d452cc16d0110293bc2f55f4cc49. 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/QZK6F2094116.