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 0x56ef505e8594c21fc4678194d0ab1da572471bb1ae9ebb2785b98faa3af33119. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ceaf663-8ebd-4fba-bd59-cb837e804a11.json and https://artists.proofprofile.net/proofs/artist/9ceaf663-8ebd-4fba-bd59-cb837e804a11.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 0xb1be8f4d33c7148dba02636e5df5c0ac73aae2f7dba8cba433494e9f4a66f854. 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/QZYXP2340364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ced404539a652f7e562f7691b7be234556c3721ce7cbf701f12b2e242c8b3d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZYXP2340365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144ee12fa02389292d0af1a5ec47bcbe320629dc97d616627e7cd9159e6cab75. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZYXP2340366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc79647b53b26551fbddc2a559158a4e67593ce2f6dff8782c59b04a16a766b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZYXP2340367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02223cfae4432e44529888b0ab59a294c102882bce1a201ce502be42d0d7f0a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZYXP2340368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f76727dc0a2bbcf11ca8ccd957ef0eaa5dc4f3c3a90db54680dbac6c5b98d30. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZYXP2340369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb0bf51b7db5819e2a8fcac4db30e603c3ddf919cdfa93a3f91957e37440b7a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZYXP2340390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d978483a1a046f9244dd7caf5e13633999b84cf014d8e0ebb9309db64bb418. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZYXP2340391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3fad9cc78d4b2d9647b329e093b167497eee2d54bb423f04ef39dcec1e1f1a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZYXP2340392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8482849096c532abd89b8d6c65cece8eb0de1fc51527ad13710f49d574ef61. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZYXP2340393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0a2c0a50a8e480a608cf5aaba731b98827e1d990a64f0c0851a008a29314d6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZYXP2340395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10aa352d2352b8dbe72cf1afee8e46b3337167ce78b2525e389dcbf3455fc4e7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZYXP2340397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d017a505067f4883e99c898f7ac1b070ffa0eef55131c63d481603ece5ef8a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZYXP2340398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19fdddfbe48e5fd8ceabf29d3125cc89ac1396ed7a917cadd086e22ca4487ba. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZYXP2340464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2a2bb8b4054280dc62e5afb3b89f5f48ee3ae764ad2bc5146eeab59153583e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZYXP2340465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6acf2056c89b1f19a0c40749a047e0f8526075bf58a76c27ddbd53a0cc9226. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ESA012371811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f46553c7797b5e674279e2d3bc6fa111f9e22ce99fcd1566adc23b5a5f4daf. 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/ESA012371812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414327d9a85df3c98392ca7429840cf83ad3524fc096ad9344d7b80426d92e17. 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/ESA012371813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00598c6b9341829969020cd1c452f45b25dcc0514d1f99baed6a128f6499505. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012371814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2203b071e41f1af103a4379e4754ab19f7e3e3a176b0858f643523777f66c7. 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/ESA012371815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4b592d15c0ce3172d83bbc856658f9a440782c66e5feac4589a7b34ba6d33d. 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/ESA012371816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf23f74a4533a29e01754e7226a53132321e38de788b55e0479ed9ad0a91d9d4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012371817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978df10e8ae0333f1ea3a802af88ddb4c2eb38399ade21c86acdf3ad0ed5444e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012371818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7bd8a32566566615d9e3168a98715508f694f19a1fc6ec0977baa79ae85dd0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ESA012371819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff71978da10183e7709ba71f34f87e981e80222959564c099f6fda913cc0d64. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ESA012371820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ae92a54ba890d548390bc7f2d5a92fcee0d211fd04252391be2b3593974f1e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ESA012371821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83a1a25ba8506b090403b0e47a2add4f996bdfb1df0d18f702e875c83f3cd8e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ESA012371822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b3df088b3504faa0ce1f2e7844e1330f363b58ac1f5f35cc8ff4a2a91a4614. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ESA012371823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d14e3beea78b2e17712845418860a428256fef909fe89ac01c67dbcd0c145f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ESA012371824.