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 0x9cc6531ba53356d591725428fbb11e5954ad03e1de756d2be69dbe69c23336b1. 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/4285a6de-2ac1-4c84-a62d-911c9e2bb389.json and https://artists.proofprofile.net/proofs/artist/4285a6de-2ac1-4c84-a62d-911c9e2bb389.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 0xd073ef2249ce370e783732fc5d9d3025d26ea402e3d2f8de58e3a33a1cfd3dbe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBFFA2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe00a51d10c4b255882722af73ded93effa5f7b24f9b0109ce43054953b888c8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBFFA2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf6c82c0fcfb3201224e3a9671f47c0d8bf891d37d90876564ef36f8e0f2acb. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GBFFA2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a45cac830dc58372d03979e75b1ef86d55f2a44000939badf1295bc1004e8a5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBFFA2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4148a8e09ff723dcca805f282a8ae8c3b6624a8eb0fd3fcfa6f5e0eb92eef2c8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T11:42:08Z), 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/GBFFA2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dff1265a2828b5d29f43a6600439bd47e0d0c5c5d94348f711046b86e36df7e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBFFA2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e46cc30c49891a907aa83e0c412b3a2684b1021e4b4e40e9d50987329dcac3f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:31Z), 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/GBFFA2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665c9b9625f2cba1a6f9769fa96d0ee30a12efe40662b4e2e66f5784a2c57f70. 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/GBFXJ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e85fbcc69501236b67c722c49d750aee4ffb36ac95103079b253b7975fa90d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBFXJ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2f778a05383f75696a20240f8e8561c3f3b1500fcd6d5c790ca1bb5508bc7c. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:48:30Z), 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/GBFXJ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b465db10fec2914bd1120fe370f365e03b14bb0da22b7f22ea1c465ce494b0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBFXJ2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb36616ef70d6b76a39eeef89d7967ad7e3c6a93b14914d3c6e02445fb39a2d8. 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/GBFXJ2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce38139d64d5dc056d5eef47f4f751c63430698888cd4c4a7a6e792ff604e484. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBFXJ2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a94869ec263542b9825cddfe94209d99515e4b2a9b0748cff49fee098d0341d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:45Z), 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/GBFXJ2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373b25ba294692581923ad1d88cdb9903c30021ff234112376f494cfadbf3025. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBFXJ2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a28b169ae7ed8a495727f5c56de83a2844c81e21a3c060b13e747b9828b9a2. 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/GBFXJ2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637fb82726b8274535f44d3b6786cf9a69b9dd03f067e038d956b67c4d4edfc3. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/GBFXJ2500000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637fb82726b8274535f44d3b6786cf9a69b9dd03f067e038d956b67c4d4edfc3. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GBFXJ2500000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ae3190240cc9cb5b88d721eda873d339656b20d25be169438bd221cc3fc54f. 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/GBFFA2000005.