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 0x91703d22013e8b03e0e3c8a34efd1ce815905919c20ba510c59a20d7b6cb9a20. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9d6cdfd-617b-4b89-b79c-d0ffd69ec7f2.json and https://artists.proofprofile.net/proofs/artist/b9d6cdfd-617b-4b89-b79c-d0ffd69ec7f2.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 0x22429f13ba6ad2e0d8c78218b9ebc46ca1b13d3aeb7463fa7a3c497fe46f40c0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:24Z), 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/DELJ81738252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6a624619a9bb6190f96d42c785f133a434345d4d7ce29492f205f0256b2e97. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DELJ81738253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d1b1e374562ed6a0e8dde7f5e8bc2e660f6b5ced2dd6d45f656a1ef04b022a. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DELJ81738255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe310e1b01c44bcffb2d5429c773b3c3a78872974f8dbeea3e4d9390e69c7fadd. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/DELJ81738256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d7ae0fdd2ac00a42c4f4165bf80fef29b40712c2909c31371ac12536e79964. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DELJ81738257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28affa17315c621f8096d3bb092ba4c68dc3521df4c10b3a9f3eaa056c64b8dc. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:52:38Z), 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/DELJ81738259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf014a1a9e291d80300b9b0b60f32e977a1116aaa449d1fdc371b9c68da26db. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DELJ81738260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a84e454bc565c1a2f3244ddad877e74d2eb91ea7d674e7db6750ba65133f699. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DELJ81738261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a3d4e63e6f8f4007c2f295853ec7b9eeca7300dfcd970474edf2789aceb338. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DELJ81928699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4764d69c01ed9eb2471af2d9a2325d3096b2f39dc71761ece985d35311670d39. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DELJ81928701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223d2654b842f46123ad53f005c87662342963b764098f19a78d06e0f9c1733c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DELJ81928702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf5b4ad8c545316128e6dc42e99ff81cb3a472e2c061a5e1e2a9101d31552f3. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/DELJ81928703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67226340a3ebdc1ff7f5a9cbacb36498ad91f800d07aff8dbe46a3fe62425737. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DELJ81928704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8807a94c4bc04ada793321650a3ac0d053f1cc3635cfd87852e823f55e31cc1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:10:43Z), 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/DELJ81928705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827738f095d48cea5f2fca78fe527b176ef8c5e8a16d8e424c90cc1064d849bb. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:57:42Z), 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/DELJ81928706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98828dde01d605a718d387b5ca026ad0b5e9bcb85551dd5471b08d8d0024bb0b. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:02:58Z), 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/DELJ81928709.