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 0x4f672b8ae1f9be4483d7fc21ec7e4dd1d682cc5dc9d1aea8882c8d0ebde8cae8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b8cd9ef-f84b-4f0d-a6f5-ac888046c1c5.json and https://artists.proofprofile.net/proofs/artist/5b8cd9ef-f84b-4f0d-a6f5-ac888046c1c5.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 0x7e2277ad6b0110fed9fb89b511d6741aedc54734af9ac306ab23245b1fe70ff0. 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/NLCK42230199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780e42945eba3419a73bb3072b619fec8b8fbc58cc07759231e5b46596daabb2. 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/NLCK42230201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94e71e7f6e68ea7f42d09604a1ef7289744d5241cad91bb605419a52cd89171. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLCK41045739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae4e81435ce8106c0aa65b2f5c740ca83b6e8accb088bc1b5686f361ee66378. 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/NLCK41045740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2b91b1c5a163409ede3ac6b2ebee842be989ffb76cb92aaea037d6ebf71993. 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/DEQ121424596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa952cb11e18e4bbc212318c068f420e2780012b7d8cf43c50cca301b975990bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSZM1000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77e7d6886487e1b2a7a1670620098db5ce39265fc52e4d420007f97562b374c. 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/GBSZM1000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691cab6424a600bb4c3a180a14dc5b4338d67a7b079e25e9b14f87b3feabe176. 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/GBSZM1000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183899c5b6f1e4ea4cb15d88b49fcc4b81afc97f45b551f2fcc8975556a5c940. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB5KW1800344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190297b3b800e4ae119cdc9a8866212e64d2c05d1182a0806e86f4055f9b8d64. 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/NLCK41050346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc75afa9ba42958cf9cd410002370b8986fcf93b52b66af52d2392eb4277592. 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/GBPWR1600631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c31e660b4ac16595a6195a08c1f5ee89abdeda165613d5cccc5f6d9f759263. 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/UKACT1830610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9641e050046e7655592827215a31b2e31c524a5ab3cbc735242941ce4175876. 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/UKACT1830053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aa041ee81f15960b4edb26496ec24d24fe7435c79311683a4165f65b320706. 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/UKNKE1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5492a571a534525b68ae3f7f87f9d1d40e11e819359259aa309769b106a42097. 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/UKACT1830022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e819bfbc1067549d9d7c0973c3a296071834a9f5a7976ba3dc24f50f4f0354. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKACT1830617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a36dce90cab715f6d13ae4ceba88bd63143c99ae64dbd96c590e18caf79dc4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKPL1803731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675cdfee705ecb1a56663e9b6abb6a25c15723311059ece50fdfbd0345e3c21a. 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/NLCK41088520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6df9076871be295d93d2985710bc7dfb0f8fc70179304d1278de3757ae8f17. 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/NLCK41088523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901755c55c5a4afa4aabd678b2ec43360235aa5cba79cac9cd3b55bfa22dd094. 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/NLCK41088528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18766f327cf133d301465c63b65c6fadc359044f6325638bce3b238f6e6b85d4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLCK41053850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bd8345010fe7d4343963becc5d4c3717e5c6f92256dcd3b8268f8964c7c19b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKACT1614214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf634f9da2deebd44d095540203d26c57d78aadac7d29d1ada8b1da7929330922. 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/USA2P1638656.