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 0x8b0bc5bd7e598e16182a4db0b715f5a666032286f736002989c76142bd18df6b. 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/aa41c2b6-f8c0-4bf4-8c79-00100dd806d1.json and https://artists.proofprofile.net/proofs/artist/aa41c2b6-f8c0-4bf4-8c79-00100dd806d1.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 0x3b516bc6f400a60108f91a2e614347c942aa02d1672515b905810a1bae62703a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRS182115846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2358b145048c675ef9e348587f3d02100a54618de8c58b1a2d4bb013dc0c2b45. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:18:29Z), 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/FRS182114283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c72d9c4fac72b2323b6e15e5a4e0db27fbf2b0d198e73a2c9bcdf27274e40ef. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRS182114285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de5df493ab8b85ad2c09ef6c3d8f05a1e6b97d9a640e2742962f4d6f5cee4fa. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/FRS182114286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd257f8c5beac5eb9a658367ab7662ce6175727443c9f6ee7ed9134af1208ac41. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ71966429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ef1902479469eedf92774baf0719f947e26c77c3dabb5e7a27591392a5fb19. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:36:05Z), 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/FRS182114184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc823167f2494212e0d6bdcca3d480e384af02fd3836a375de2904cc6f06c86a. 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/FRS182114185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee9fc20c8437396b930b92b202dea573471ff20e547a4870529540a7baaba4f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:04:38Z), 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/FRS182114188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a8935e425b630da87f9cbb43722327f40d9bbff9ab84740ce6e20158dbe0e0. 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/FRS182114190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb025c78d538b812014456a796c5ddb87c1830ab9cba0dab88296373c1ae6f2. 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/FRS182114191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f08ca57e83d5e36148df89b5b63b39b21f90c02351af6bf37c43e7c973770b9. 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/FRS182114647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef28582dcd2f2eced9b5de8567184f0933a633ccf07bbd7cb6cc36682d878a35. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHNA1948970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04a5de1154acccda4d444a73df835e179077425e82ba14b55674dbb8365f603. 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/QZHN81952972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b633c294e7535c468aa786ea0e8cf53e3dc64fe8512b13d5bc1ee46adb40ae0. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZAY42100624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987668473dd0a583a2297ea843aa566dfb9e6f1cb62dd42918a5f6e426611cf0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZAY42100625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518fda80556cd675ec0aaa7c55eab72ba61adf36d45e5ccd60b1e317d1066375. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:18:57Z), 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/FR2X42259352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8828858541cb7b51eade5d0b552a049d643e8a17d5035a87cc6c2536933aed. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FR96X2215739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df8081579481d797e6ea5bd7e32620a57451bfce79ec63832a13d1cf8e09ba5. 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/FRX452270129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364c1ba50db3eca2730dcfa8343ff318e8d800038360f16625988344ab770ec0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR96X2300594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdede111525bfc636ce377dac8f25bbcec916d83b250bf28bde9a5e24b381d3eb. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:49:53Z), 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/DGA082359192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3115dda6d8ab7dd3023b07819c581d5d009b1e4201c34199f4f4a5d784e5a072. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR2X42509767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769bfe4ca10e2b5be0841ac76748b9dd6aa1ebfc5ab3762b250f989f621208ad. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:07:30Z), 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/USCGJ2520649.