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 0xe854f1661e2bbc3a3bfee83193d9f59ed5983c5e362a13abf30014809be7ed95. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35e80b04-c4ff-492c-ab13-c412c40f15b4.json and https://artists.proofprofile.net/proofs/artist/35e80b04-c4ff-492c-ab13-c412c40f15b4.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 0x04db968101a743b9fe5b969678e62e3a8e6ff4da067d73e03e13b5de7149a03a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UKXN22457441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559e0794b1e2889070cf8292b04eddac9a9915ed557cb0779d6ba8ec6c451d45. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/UKXN22457440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa244dd68d1d972ce6ac0fdc2a4868240f981007734eb317e42ca8713734f6530. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/UKXN22457447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3288f9f3c0ea3779019759510e5f767a477bdc8fe9dec11be06fab4f77c5ecf5. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/UKXN22457445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439ad3e20b3fc216f02e73613d3f0d64de9598550473dabb9f3b6b8d7e3007b8. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/UKXN22457442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e0993658a375c430330e014fef85a8d8f4b0953cd583d2f2fbda0c81f447be. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/UKXN22457446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2a7d9f20fde986bd46f183b87a432390330f942fcf674fd743076b5e4d087f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKXN22457443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e1d9b9fdf2bc5676ac51f542528a2a84c5f14e7cc166aef018ee73d761c484. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKXN22457444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5764b2099c580a6f94dcc946e226bb719d11dfa1d025a5573b25c42e5333c79c. 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/UKXN22484093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79f3c351c7a740de0001c8ea83381248eb1bc831476132b345d739fe79944bc. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GXF9Q2534782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26273eaa038f94df5bb44a6a7a7b379765b5379c058dcf4c392ca74d8d48a1dc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKXN22535009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1423ce5a37190d3e76224e68d804110f9e4cee173d8dcecb09ce28e2c23de1b7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX3Q92510078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed58d3a61e339cd6d6e319e4b97515d0856e78078755b903e54326d18f50ecb0. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/GX3Q92505309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4013f4751bc3ce8d976e8860310ec321aa83088170254529fea8139527a67aed. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/GX3Q92505641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6e0074e08399229bb62c156e64a5cabda91c3ad25023cb656874cdad1196b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX3Q92505536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e157d63533eced2c6491a102e772bd70d61c02f1159324ca0abbe070154c6f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBLFP2510199.