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 0x083d492d7faa289523ff990c14c32138ba32b5d17ac6aaceb4c3abe9f3fcb105. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62f57efc-64ab-400f-bcfc-08407a47b1cd.json and https://artists.proofprofile.net/proofs/artist/62f57efc-64ab-400f-bcfc-08407a47b1cd.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 0x658469b818173457ebe0e216523b1b92aa8cb9ce494063ef6a9a81b7f4ff3895. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZRP42498049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8df670363f64735c0a4e51304c657659c1f73a52d5b7ec4c11882f7cdab94c3. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:52:46Z), 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/QZTAW2401638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8e661fe14017038e79ab53b564822adea4b50333d5d7ef19d0873c9ae9b726. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB22457907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7167d5f96b375ddaf2c195b5a34dffb3e3ebf26140b46f8a8b7f458b893830b. 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/QZTB32476031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce6d6bf4b95745668087ca818be1bedcab8c17662ea0dbfd0b8963e23e91e39. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:32:05Z), 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/QZTB32479076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a3291ef08e37b21972f973c1562fd251d23c5ddcc4fc86ae57229a928e9b04. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTB42473604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1cdab526af5ece476e7c48750c01e61d8c4aa5d29cf19c7aaa8778d9c60bdf. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZTB72440274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0df43548c57050878854b5800b7117f14b4b14a71078c8d0a4aeb912f81c85. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZTB92425992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67712ae92572d7f05f7cf432607219681e33c0fa3faef0e35814b17e4b051345. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZTB82497024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da23181c0d68367d4b5c0f4d0b09c5aa4e9baccafdb29012723fb1b69f266c7. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZTBC2489245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a5c82be14f469009f5b718303e1f73c3c701154541aa1563554eca6f3c21ee. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBC2484540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771da811ce463d0d298e748ccd60b40009f82d1c5029d316b0198b0f56ba06e6. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZWFH2493097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96066361c88966cb2c94e612723e80ee02f1f1dc1e3c6c41a04a38a8dcfe6fa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFH2430225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094aa0e777b2fea75c963c7011a1a13e672032c291ec17dc81951f921e1f01e8. 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/QZZ772455878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f87a1ece15dd3dfe4e3a4d4f7042fe5dcfa67159d8729eb4e897a9938200fb. 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/QZZ772458456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1258b2332988b365bc1279cba787825cee6235a76d453385dbb25bbe610b3b8. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZZ7P2492816.