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 0x67bff7200aa802bac1af5584f86bb3944a22ef8b9e1d25586a76ac4aab65f93a. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0c5c33a-08fd-4232-9106-c8489f9563af.json and https://artists.proofprofile.net/proofs/artist/b0c5c33a-08fd-4232-9106-c8489f9563af.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 0xe7589db866a4a3dc2b5d74b79d06efe796170ece67bb4440e08b266e5a13d1f2. 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/DKABA0800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7e9773d808b402fb56e8272ca3759dd954d308bfd755ecf946a06fb3884376. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DKABA0800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bdc777712f6d9930b3b6ffe692d561060f9a0469f5a4f48bed3481a918af49. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DKABA0800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb087ac743faac69e6d6a8a9abcdcdb22b60849b3f2ad5d7cd391fa720f4e8a85. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DKABA0600847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24654cb1637f1c39cb8d107f5244920d5027541d98ae2699b2a2fc9a90b2cf3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKABA0600879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19025141ed0032eb8689422d1114081c08b64aeb96c615ec125d7044e62d7c4. 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/DKABA0600857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fdbed04e8b74a122d4772962d319b0e9ce4cd678cf2c21b4feb199caf2d839. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DKABA0600858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcc1a2fe891e093a4b914e6cdaca771d93c60874efafd79138a4d42c3b887ff. 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/DKABA0600859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41513250408b84360db87ffc779ffdd5a84e52a23435fe3397009fb4b6f3e36. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DKABA0600860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546f48b7cbc16c3b59481aba8e5f8ddfdb7b485b2ee6ff5b42a61cea277bb1b1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DKABA0600863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050aa85097df1d4833bfdd7017da9261fb4f6f13eb87e762753d749dfc25a453. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DKABA0600861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4161089791d7b736c9450a7e6e0ac51c1a84053aa1b5ac26d8be76275a2ef0. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DKABA0600862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07131b9fb171c9f2e3e94b634a0996985f44984ae01972fe5fc7151f68cebd39. 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/DKABA0600864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705bbf5d62aed8b17d4bdb65951a8ec17f1c5d9979fb266826e8920386002956. 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/DKABA0600865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557f80a5f6e88b3382d6c7419084ae7722c573b176aebc175eaff93c04a0ac67. 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/DKABA0600866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b816512acee30131f508c4dc4926cc1902c48460164b23b9e6ca06524547b7a. 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/FR96X2185443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258b1a24947d14781bd9a621d3a49e1a52cfe7b369ed768ad2e4b2d82c1643b8. 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/DKABA0800311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9b8cf32b41d97ac648842cd2153db9eadb8a0a6fce2664ee167078b35de484. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DKABA0600389.