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 0x6fe1806fc505ff1584e67ca017cf27d80c8fc35698d8dd0ab4a50632ef970d4c. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f36176ea-2513-461f-aa33-3d46c954b190.json and https://artists.proofprofile.net/proofs/artist/f36176ea-2513-461f-aa33-3d46c954b190.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 0x7925692f4e05f602cf151d58fb942b4e394b5c1f74a075a6e0788c41d49a5f78. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T18:00:59Z), 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/UKDVC2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1e8954b64590b0e2f32953f59708eea8fbccc97a7383635ee544261a94e018. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/UKDVC2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe21f93fc1c8046d519e14c286d2a9f58565acaa340252cddba81060ee1ae7fc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:28:53Z), 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/UKDVC2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4650ecb46f008605a5aa30302082cc4295991c0349472e7a6ccda0a825d2e6. 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/UKDVC2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d50dc5adf91acf5fa2c63ec5105bd06eb633f788d3c025ccd0002b1ed3b53db. 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/UKDVC2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef46ab981df9f7909ccaa735c5f2c90bb15ef0032f501adeb4357373924f540. 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/UKDVC2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1529bb59f635ecb84312ef6c6c95be5070e169d282dedeccffc129d9dcf62bd6. 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/UKDVC2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36784f5dd9a08028bfe0658213ea99b59ecfcc461add3e673141d56d29beb77b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UKDVC2200003.
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 0x1951f9671f2f9fce2e42a9f32b43c6f6cabb7c2cb84374d0cb66383be46e5ed6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/UKDVC2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aded833ba5e88af1c95502190ae918efb52aa5e122f1b79d82bcaac569e1a5c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKDVC1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e562db9daa984e6936f23d64024708a5e722eb9b13d506e67e423f2d4be5ea9. 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/UKDVC1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fb50b09db86df335127dec3e691d3731a8edb0ab3ad3c461e53140142f9bdd. 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/UKDVC1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8f3c3fb32bc193f1c885e33e1a7ecc5a50d132c96b0e35b4456db2b1f6c271. 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/UKDVC1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf674149f465b654089b0f5a77cce15c0add1c17847e2587713d04db1075096e9. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UKDVC1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde91d1b64f73a41ee9722b2f80d3d97c0d635e0e2ea09abbc727fe9efcf9cbbe. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UKDVC1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b56757a87d22dd3fcf0a19c193b9b17eb08f07d98badbde88696e0a1632df65. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKDVC1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d295ae5c94eb9fadf50fd22cece4450b6107bde9fc0f644bdfceffd6850ef4. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/UKDVC1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab92359df218790c59278f8bf5dce30f0f7b50b9068e3c06b0792f7c871622f0. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/UKDVC1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171e3fa41f11cf36cd42a582d435e347146e5ae2ec25c5f6a7775da00943ded5. 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/GBLFP1194707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2c27d5b9c31c089696df8111c42002ab8a060a5da8366c19fdb4054992e35d. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBLFP1194518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344c90e0b6c8b2e4250e630f0be9939bd45e445d075d7a858a9cbf944dde4fcf. 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/GBLFP1194522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74404719cbef675890898be6774c5c7de041c25e536866bef79fc5091457af8e. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBLFP1194568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616f8284ac1e76c25781ced146ad7e760be5741cb5267b0f4d852ca57d8e35e2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBLFP1194579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9eb2b53f8d94e4ccc6e682c4f8e2fdd928134cb4dbf5b2d546f295045c16ba. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBLFP1194637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647c86e76e2fb4c0e1017761cb8a5ba1ae5e8d29286567279a77c050128ccd76. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GBLFP1194663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7487d4db27e890e1ae2276eab8a94975429c8363765e182f16311b93ba1f0cac. 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/UKXN22024915.