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 0x887cdff83998d6dc0a34a7b6715d6b415967ca32295edbcbf006665c8757413f. 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/985ef23d-2f88-4bda-b93f-ba501a089381.json and https://artists.proofprofile.net/proofs/artist/985ef23d-2f88-4bda-b93f-ba501a089381.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 0xafb38a514da13bcddd022d3e0fed858b3a5b6f80368d6a127988f95526457aea. 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/ESA011662266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fc8918329abb604faa1dd3b954b3aafd88412b4b6c43b7d6fcde7a5c97f20b. 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/ES40B2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f6596c8a4bd282bd799073ea620aedc7d4b27c3dd8b826252fe33720f40072. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/ES40B2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579beb7610e7c23698770ea79bb96cdc3ce9644afddd54283be186ed0b58c58e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES40B2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b2952b67d98c58c51ef4eab7d3e0f1db41bf35f4f1824c730afb0a8e2bca96. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ES40B2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c39d0d19549aeffcca094ca150c140ac5cac2cabca4a47bc65ddfb93ff19e5e. 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/ES40B2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23226b4c795e4cc35072b5bb5e0d811830a692c77bd75636991bd133f1a4477. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/ES40B2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ca053ce43aa627d6a2250855e3cdbd8490b8654b697907a91955e29a632507. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/ES40B2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369260464e23b6f1b001e9158ecaa790c595c2445c76af21ec3d826ac688f16b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ES40B2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebfe3fc368e8caf1a8f2aa71047aa5d55824c3ba5c16bf595535a80c84e7814. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/ES40B2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa104179ca1f4ed2564658cd7122e9902cc55660623dc3bb4d90059889956a021. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/ES40B2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacf5c3083624cab8a92a0eebf7f830c5b4849de32f1d33166229502c5abd347. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/ES40B2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4cbfe6026f36dc6f72b6b624db3537c5cddedcb55b93fc2d89f6ce1209c818. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES40B2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf718d9c3d23eabf72f91cb91f76547a7bec26c781e00f3c723cae6af393a402b. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/ES40B2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7767f0adb70d3d7e47d931d28ecd10ce0d6e0df7240aa92880e06443940fa9cb. 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/ES40B2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67a87a677550fc2e7f52fc6496ed27d32c46943c7d237a20fa52c2b975066a. 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/ES40B2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ced13df4a54168eb3d3eff1601b7af1a82c01adc6421a17f9b8234c69a0ab14. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ES5061605410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e0d402e06dd04f4b460fb30aac31df3aec5426d096b2e81059fda51af517f3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES8511404193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffabd05bc09cefe67b0e1d95bf5d7ad7171cff6c8436c358f20303ff5014041. 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/ES8511404194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f024730945dad56000779f9f73f926db11b328fabf0e48a215f42e6e809cec. 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/ES8511404195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e5afd3891c33af73be81be970a769a68f34f78d2ad8fe46132899cc85a7dee. 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/ES8511404196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2e52eeaf07b022710e8c73b46c41e08f0d298e2ebbcf4ab0e7cb7a70abffad. 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/ES8511404197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf5b2001d060252f1e0fd46c7cfdab1f849e45131eb4f2d9282e7c4462ead5d. 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/ES8511404198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb4e49e194c3022a634509e611c69bdcc51f49ca361fb8bef72660a3920d88f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES8511404199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b92090d36cff9f7a346ad5cd3f5d28b6cde928a05d82ea96e02cc388306c4fe. 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/ES8511404200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b46444389ebc4d9db88af1f8660a7881a665346ad4bad860065b316269f0c36. 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/ES8511404201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e3578079fefb972f91dd5e6c7b37f31ad3ffc029737e7659e605d59a412e2f. 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/ES8511404202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dd0d8a013a7282d6ca64e9d31f4fe61280c8768d5cc4a424958ade1b613027. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES8511404203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7400e530745f0b480c17832b65ddc531a34ad8fb919369faa70c8629d66970fb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES8511404204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcd467cfe4b601436ec6678f5e2c3f3b54755d1c79ae71616cc6a14a7c2b088. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES8511404205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b01f437f4796481fb02f7f748efed9b37c1b9f947d5d94ed6f794c38b392b8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES8511404206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba467913633b395a820b3f50ffda42e298412eebb769f4a7f14df69398f02009. 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/ES8511404207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af0dfdd8a48b602299b33c5dc97a4881068ec8c28d8dbfed8e3bb296f21687c. 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/ES8511605648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ced3b1fa0ab8ac0786758b42e5d1f2ddca5364bd30b0c084803ff4f7d30149. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES53S1601808.