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 0x0beccf7c13307b7651c61ac8150f59c4d360c83cc9d5576989e69c7f54a47ab0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad1b53c0-567f-4d05-9609-6f2807a0561f.json and https://artists.proofprofile.net/proofs/artist/ad1b53c0-567f-4d05-9609-6f2807a0561f.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 0x519e0490e74907d8ccd738f1fa98ebb33889594205c58db3f4a0aa698e4db284. 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/TCAJD2463419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf585a491d88ba486b8b1157c379f7ea6cb85f50413b960d4a8693341baea37f9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJC2463432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03984ae1861b555ebd267ce26baafb94aece65f454e6c1095f7ad34339e460a6. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAJD2463465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10343d09aaedcf65f83d9b3b97992e34f5e82a84c95432ac51b3cfb1da9ccc1e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAJC2463483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d7ff3f2e34ddedb01b4d10f18374ea68aa17446a93734fff3a55d2c9fecae3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH2523041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af35c5619332954b478439609d4edb986dbe0326fe69135602c62612f016dcb. 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/USCGH2523042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd567e3d2b91e2d8340755c55970ed3dc1e61dbeac00b25e23e8bac6ca039a427. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/USCGH2523043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa996519b4a889638cbb3f54973ae0381f150b476e35ca2d1f3849e408f912b14. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USCGH2523046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149e8501ba745d9299c3ca55de72b809fc90a9296c260d11f5a8186302fefed8. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USCGH2588686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e84c33dfb0136ac84df0cacd65bd3f7eca726ce218c6d89240d19719c6446d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USCGJ2572336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2db85699042042ff29ecfdf1c772cbe7b3488269741d580fa82e83fc612c6e8. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USCGJ2572338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82ffe7e088f0818758191a1c6a2d27ee458eb3fffb242408438293810d7eabe. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ATR981155140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bee199c211b15869740c42965692b4d8e7d8039a6b7a7a0e322103f619abe91. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGJ2572339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52f1ba6e7c4b284c23ddf1dce3ec8ec07d5148ef9781a4886bf4a5ef36fbccb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM82520640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b44d5b6da2e2990f5c7c51e77f8d4f586186862a1f6a4b0addf3d8cf2852b3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM82520641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85cf7ec8f7fd9b2354d04484e2c967bde3ee63cfeeb5e4142afd9ec5e82469c. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USHM82520643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb232d8394aed52276284979851ec811ee02a11e8df4fee638eab82c64d0c091. 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/USHM82520644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329078f008c3ccf6453d32dea62935d9d3f5fadc4bba30db314a2b974dd6fba9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM82520645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31180848db36c6d35a87f59c07aafeec765f047c60607c2adf9d755090c62320. 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/USHM82520646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a6bb137bafbad231e00291b818d73930b1b9493d3cae83f5b8c1de087c1ece. 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/USHM82520648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddb8f326bd2b87e49224a66fcffce9205902f7a594cce6019b8869a267a6a45. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM82520649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ffdf479ff28ad9f2b7bce75d99b6a0f1fba15a4683195db19b82c3ff6d3047. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USHM82520650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3727fa673263ce653bafe6d5c88fd0116e92634010729a487399b3772740a9. 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/TCAJU2501312.