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 0x4c4e3721d986c7eab96716b58993666bba923701925ec9f537628ec5928302c8. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4013d9ab-bdfd-4c56-9c8f-43a48e474c05.json and https://artists.proofprofile.net/proofs/artist/4013d9ab-bdfd-4c56-9c8f-43a48e474c05.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 0x5fd53fd68091eb40a21d87056c9468e9c4364d7db149383f0561cb734725a118. 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/QZWDD2594414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adf89e8e7e099e237a4a21ba3d270e0ffbfa0aa47faf44fd38946785f44c826. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:50:29Z), 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/QZWDD2594416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3bbb0c284bd864ee569710dfe163fd5c9fdc836e2b183b1adc40b555aef54f. 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/QZWDD2594420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692dcdf6368215c4f98d2b4a199b0cc956242becf5593da877947a81bed3b798. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZWDD2594422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961aaa5651b385fa7200182f19023083f0ca6856e584e3a9cbc4ed6e6f9e8b84. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZWDD2594423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78cdebf35b66667c02d2aaf0ac376cf92c95a87f121cd7e72610a4a9217aefd. 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/QZWDD2594426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092ddceb84b23076082af24c9f481a3e7ba07989f430e6a47d3557b1800d5c27. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:43:21Z), 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/QZWDD2594430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37543822029be405638a79a98294dfeebe343003ccc71b312c00dd9e70011950. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZWDD2594433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d76b5bea23c94ae8ca43cc8c16a4a883600964ccb77f51282688f7e2794a17. 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/QZWDD2594434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584f278d3667552fe4781a2537f6dfbfa99415cbaf247b82de24d02b7982582f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWDD2594437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1b76e96e9a1748f6c5fe7853e806eeca2f01a69b8bc5f01672ac56e7404581. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZWDE2500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775327c852e492005458f683fb52f146ab2e46a2d4b15282f6ac8353490feb8e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZWDE2500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cecfc90ee055235a9a9eaa502e9388256667d4f4b97d888c203023fb86e917f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWDE2500233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea522dfcd193c9c9f2020e9b5f4ac5e0e2668583a6827b6743ef5fff24dbb51. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWDE2500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdf49cf725b5d6a36dff2fb50ef4b193b9fe203e7be8d7d5688879374561e63. 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/QZWDE2500239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd163196e6e39cf6d391c4ec277cbbfe99c95fbcda566f4fa96965922d3e1fbc. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZWDE2500242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe7a9d4b0c83f14f64ed2d481b752c19543dd188cf0662f463eab5d273b9015. 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/QZWDE2500246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0ea29086e0f57976f20b84b1a583b8b63e032608f22d0a9e434a4e26624611. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWDE2500248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bceb0e09d8855c21776ac2e7e9f78bc3a9a751241f5487c497c01eed013002. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:22:25Z), 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/QZWDE2500250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ce0288512e9e6086a8e7f08826af09c02abbd39a382776ef7672f4d49290c8. 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/QZWDE2500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fe4813d340b2906c7ef2dacab62a01c3fb9eaa654df6a5e39eabfd6d7777e6. 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/QZWDE2520835.