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 0xd25b8163fc595ffd2a89130818243288daffa04ef9b270f3962a2546a74ec74d. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bdd388c-23e5-4a63-a4e5-bdd6737635f6.json and https://artists.proofprofile.net/proofs/artist/0bdd388c-23e5-4a63-a4e5-bdd6737635f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
8Dordinary, Vol. 2 (Enhanced Version Mix)
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 0x3ac7d65d170dceb244b764053a7f50f219f411e304712cb5198dc6c19377c7fa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ROTHR2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cab292d1a449cf29a18053e7d4bf33a4e83ec413186837832228bece93eea7. 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/ROTHR2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2386559bcefe0528c5a85480b6f272d0b21890ea575c1c2a99ea28a05241d929. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ROTHR2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf2629f71028387eb278bac24a498fbbfd0d3cf6f1570d97f9d5d0975fc2d52. 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/ROTHR2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38746f6d75a99d0e3eb2104ae856d938bd48ca4b68b612b809ddf3a9b21476ad. 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/ROTHR2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a94daca71f1d624d44564d046c49e643be6e24b01887c008828a91a3d274731. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ROTHR2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41592840f27d2c3f648ce2eb27959e29470c3310bd3606972299b035a0b49478. 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/ROTHR2400096.
8Dordinary, Vol. 1 (Enhanced Version Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bb02d2790ab345c575cc45c064b9b557239619670c55ad1c140e705d0f96e9. 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/ROTHR2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb68370cd5ad85457299097e556f042c0a5fbb14555f7b1d6b6ec49a3d94cb7. 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/ROTHR2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fd485446d5e2b5b35723de1f5d35dca3bc6d31f542004783e10e41bbbfe053. 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/ROTHR2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e64cf4f5693fd72afa21f916d7811cd231df207533af9588df57080e7de591. 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/ROTHR2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a181dbeb23e2159e1376b3f1b3260263678c6f32d475f2a397291235f48e1a. 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/ROTHR2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e3d0cb6db0e660ec2bdb57f6f2cf71ddde29b77b70f6e5c00f375252d58f06. 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/ROTHR2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf82cae769b83a842cf30e3088ba64be310ca45c04c7acb9fa6e85238eeda7bf. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ROTHR2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfc89bdfcec77bbc3ac4886e8f8df1bd41c15f13c012442d4f2384bf7e62478. 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/ROTHR2400063.