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 0x2bdda5a5d051a7bdb2a722e77e3eb29e82ef57989f8e8a6fb42adb0aa6a0733e. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecf41771-eb5e-4ed3-8065-ab80d78ce04d.json and https://artists.proofprofile.net/proofs/artist/ecf41771-eb5e-4ed3-8065-ab80d78ce04d.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 0x025eaf60141b8f33533514e592e3245ee2b8ec5b3d9c51b19d53e95018529fcb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBE3A1712101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b5570c6dc7bcbba3780cc6743f1a91cf7589e2859f5f6ada48cff8a63357d5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:03:38Z), 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/GBE3A1712103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fed798e13bd27399c28776aa8bb2807eaa1df3c1e4904486330a6c39d7efb7d. 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/GBE3A1712104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee97d3a4d5f09923c50540acc4b222b7dd72ad53da017a6febb0898464f86ce. 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/GBE3A1712107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f45e2767c2eb905befc09236ac5203ec741bc7317e1e2e2dc56f17f4354b23. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBE3A1712108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa263e3c7288cae81f011f8f89d4bf57ab4a3da9f52f70eaedfac2e3abc876ff0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:18:02Z), 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/GBE3A1712109.
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 0x2cca911cb74967ded81d02baf297f9019ee6ec610bd6a60c25bf2cb988996142. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GBE3A1712102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3b7b853df558b5becaa87eff01eb39231928ec937771c268a787adb67d4556. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBE3A1712105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3236db189cc162c0e346d914fbbceb5901b93cfb7dda4fe0c72344884aea33c4. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBE3A1712106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd554356a8b58a90e2a39c53dc78e0141329ca6c39434eb0ca32c86b1e24e2abd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBE3A1712110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840c41bf41b465d927c58aef18a813d7df29f2b20b30659a2db00a109ad3cb9c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBE3A1712111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b7d52c10bb6030f25692185f7ebaf5fd2389a1222836e632b6934ab5d4a9ed. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBE3A1712112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e834f974447f36f78d0247294e0d833002ef2322477384fcf3a78c2a9ce0a82. 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/GB2GC1903919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e98788e46d065b66162bf00f704a9f01a01e71e2caa7644505ad15dffb0d35a. 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/GBD3V2106011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17fdc60f84b293fa27443b26e4573da7947d9b30fc97e88dc0bf59ddc151d99. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBD3V2106005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece304be9a09deff64e5d4364e3d9ad1409173e3f66dfcd0f0a856f3141539b4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBD3V2106007.