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 0xec9e4e43c17fd200eab65e4d58e696723398c743783376b57c98917e023f5e09. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea49a0fe-a891-4fa5-bb34-8e6adc9fbf25.json and https://artists.proofprofile.net/proofs/artist/ea49a0fe-a891-4fa5-bb34-8e6adc9fbf25.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 0x97d68e844bb4f23a20d0d3caf0ac72eedded4b7a52175b9d866dfd0351492c71. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/DETO41692819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7434d74d861be7cd8df75234eb12a555fb45a06d9e31e6c1496aec01ecef059f. 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/DETO41628843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5ee848b5e1f2f5a06d57e4743fed6ecf5864448bbf35196343476c9ae62746. 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/DETO41526424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084298330115fee910e5c20faddd1e5b3aeda194a4c22462a30fb4bc19f62958. 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/DETO41696658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9211cc707d7ade28cd1cdec913c59c26954064b3130181ef59b7b63a160f8e15. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:34Z), 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/DETO41665086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cb0463975bfe75ae0456e67c33a146c40efbbbf32c5e9c858bf652a2cc13c3. 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/DETO41791765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe765cc011ebedce93b9008400db4d616ae60d0f920fb2aecf512c0242ceb79b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DETO41732094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c3da64f0205137286128f8a69a565fa0288273270f9b364aae8c5f3ba90738. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:22:33Z), 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/DETO42051778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18659a6391ce5add222e903a2ac6e145588b9f86bcb3172ab58eaa38c2ae58d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DETO42314414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30602af8354fd0212c59c168201dad38df8cf6a9400adb3628c84fda15f4232c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:39:19Z), 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/DETO42293888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37cd4a2781b2e561e1ca226aaafbc9868f0cf277dea6a3eb56dcd96a2b4c6eb. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:24:36Z), 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/DETO42204432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3976d33bb8845c05c24d19ed80641ad4238b379bf8e068ffa132db32823ac19c. 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/DETO42297394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd77cbbfbccb0292105dbd0cb30a73e337080f9fda60b35540b5deafb342d3d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DETO42242220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2849f6483153d7520e3d666f0cf48127f6f899431cb24ef5c5c6d190cb5f05. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/DETO42241321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d6b420d5846c29e1f34468741a733e538e33579b13e4b6273e62c5984e8cd7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DETO42387148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e66cce3627e2239ae10f15b640ee246e02ba70629f8e90a6159ceab28c43a6. 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/QZAKB2349162.