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 0x0c7dd5c5d7707b15bcac792f25c854cd94766ad47355c2c8c090dbbf2ced0ab2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc951e6d-e869-4fe5-832a-112ab9c4c4f2.json and https://artists.proofprofile.net/proofs/artist/bc951e6d-e869-4fe5-832a-112ab9c4c4f2.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 0x0e59d23186af736ae2dcffac576d5514ae8f5c64f6fd8ac82863ae596f98b22c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GXH2J2579103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a918bd208e4b77c6c78a6a6695bb1674e82d5440c5c979bfdf65fe35bcda155. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GXH2J2579104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea90e24f70cf4ddc1a7e594b36ad00c207d68c41f9a95ea28ebdeea89c4a8c40. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GXH2J2579105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893e5b14003faa34453033291dac7ef27c1014066d4f3a81f5d27395f7233864. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GXH2J2579106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2921336a75b223585d2e664ea4713f951fb563ad02466a0eeff58ea644790a45. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GXH2J2579107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf456c2d0e8d7bb4c59edcd6badedf1cf827ba3c773e7fdf7b088853ac00520ed. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GXH2J2579108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62e0d7ed61dfce09194ccaed6aaa3ef6e6cb71d339e697ade95b87b518e9bec. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GXH2J2579109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedaf35c382f583393a52d9566fb29ff4e96354f8756c14866090eccdbb66697. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GXH2J2579110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf696d38e070938f23a12d5d22a81e584cb44db1ee701c22f3e84e0cf87dd647d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GXH2J2579111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d6ff363bc7926e256a07e584578aae08de177258ec134f9a13cf5c52544529. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/GXH2J2579112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6062605dd4624c0f9deb7da2672967508002b5569fb92df0fa4d6e820f7cd5a. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GXH2J2579113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f7157b27ac942b54ee87b65b8081f10adb8999a513c5a7db5700b66daaa73e. 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/GXH2J2579114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd03d7617330dcc4d3f28542431b4628d35511d4457311352cf98d6e115cc5b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXH2J2579115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad435a2e3f1cb9b0125fe000408fdf6c7265b50ae587232007ef09db4337efe6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXH2J2579116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633007a61424a4c4ba68723cec7ee8823e7970a2d79f68a0d6872d7f9c559e6d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXH2J2579117.