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 0xb6fe650d09be5f5d9d4ec95cc2f6edf61048263036ad58fe58b53c8efe9da057. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa9e1b0c-2fb2-421d-9963-bd0b0f24c626.json and https://artists.proofprofile.net/proofs/artist/aa9e1b0c-2fb2-421d-9963-bd0b0f24c626.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 0x9ff7dc4edc6a8c3e3e549a694f8697551e2a949a68f481d741249508cca55b4e. 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/QZWFM2590243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2b0bfa0f199e07d159a99f8030292e094b0fa361625c2804df0f0e11f89189. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFQ2571989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b4cc19a0b2d6b795ac897921cf9110a3918e9959b01b3d61901b21781de316. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:37:17Z), 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/QZWFQ2569830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44998de5f18c6ead6d9c0e54a6115819b13f75e15ebdbb6278d831e8b4f51a2. 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/QZWFQ2569848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795286ecd4ebc3ac8cd2ee64ea51e5b3e592bdb6477745c7c5b0a4a986231f66. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:33:11Z), 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/QZWFQ2591783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5530dba25d84996a78b5242d5c69c792bed280080a85dff9e8197231abf444e. 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/QZWFQ2578404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85da4d64650770622356a2fd7a150776a1dbe3e5c325a95613eaa8f4adc2a680. 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/QZWFQ2569851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1858880b94e19f0a11abccaa3b02d085a6e24681abceea35fa50530fa2d92985. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:29Z), 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/QZWFQ2571986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c92811b99d219a27d4459f4d7fe2295dbf0e6e929b8fd267cfd1deb3612c18. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:36Z), 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/QZWFQ2567424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe104e71db754f2fbefb7367c716666675771eda44e993a03d19d41d5a7573f2f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZWFQ2583687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2076619a1f9b077e11857738616c4f8634ecea286e325c5301537c8c3aa6075c. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7S2534306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cfab61d8bf720ca3e75728938d98166a25716c4f74e3372ec8df5cf69865dd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:25:39Z), 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/QZZ7S2534316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a38ea3afb6fefbdca81a8f948fb03e8809259bd00a027d2458fee764ee1ac03. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:58:34Z), 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/QZZ7S2536355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f97ce1e6eb9fd111efa4cf79ba75e888b5bf2a2745333094ab31869f892b75d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:54:04Z), 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/QZZ7S2534317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dc2cae655623de2408c99be6668997b07bd68b8cfde775e643082a89c61abe. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:25:26Z), 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/QZZ7S2531851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ddd86f997c8bbe761977d59cef493e3adfd66b8af0650c0e966a61ef4fcf31. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7S2536357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd458c6558a18b253e4652d4950bd344d4d77e3bc885d34657ebe3e0de877d685. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7S2536353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cf9a83a931ee23715d6fb8f03964fe791f48c6b20884c58a93bf77a6468fdf. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZZ7U2561375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed19b41891d1670339835bd78aaaf35286770078964c53cb5202a6200e9a4c72. 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/QZZ7U2552418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938897b612631051a2a3dc8aeb9e2b91ad8c9856e9ad29058128db31e26292e6. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7U2558590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60072108b0abc74bd1082a76aea93767b42fd6a9921028e82a2056ab572f7d0e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:58:48Z), 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/QZZ7U2563992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cd510cfe877132f3f998cd82232eec6e5d7428748f23b7c4ca27f5e4aeae4e. 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/QZZ7U2558635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c035c6e23240b7dfbd1823047c982a92bbbcc8b8aec35c7cad29c8d58dcd942. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7U2552484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09402e67f6e3d9c636d5b9984c3db5132a6b011c62e851905d1b73f0ddea984b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7U2563996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d19c08ee9e7b3bee5d8b02ef824e51558fd55dd1224d51eb2c4b644ebf7054. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7U2555952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e85bfd68020f2695a86bf2bc8183ea14f32153eefd906924f3c5097fced64b5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:27:40Z), 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/QZZ7U2554149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc47637144219ca2098100d5e86c5e37e0e2ab0380581551988ea520c64ebd40. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7U2561377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bd538fefa870ae6b85287e19c2e916e0ed51bc894aaf8a16360d3a7052ac56. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7V2518679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b060b8eddfb3560af364e52458dfa2724b6833a2cf67081dcfaa1c9c7621a5. 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/QZZ7V2515783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e2f38fc78db9dea65eacddb334e9e1c98f622674c28483e5aa5314b5b02e3a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:47:23Z), 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/QZZ7V2518724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223d2e0dc770f8da5a9f353ccda0afe84a939cbdf776095daef93ae4a69a1a60. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:33:11Z), 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/QZZ7V2518712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087affae0d02a2072d2d48833a05a365e4001785cb097cf2f1f98c541e931881. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7V2518701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a28f9319beaffdec8b30705a98e0a91c593565cb40038b49c43347db9b57753. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7V2518677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee86b185b1684f644a831bbf22f63c67aed3f2140a018a950ef3e55882efe31. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7V2523735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b8257ef5079b6ea92ba7e828444f29f58974964941bf0e35982825f896666f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7V2518682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c363ca47cb0d975e08c67c83579b91435d09c2e80d8f9a717b1ab878ecb9f6. 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/QZZ7V2515756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06984ba5791c80c49e63ef48b5e6d6999f845e84db012c41571523d98487c407. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7V2518686.