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 0x95f3624ccd426d62251587b75653c40f00af11cec89480402a5fb5446259307e. 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/93f1abc9-1005-4432-830a-dbd3a08f0dde.json and https://artists.proofprofile.net/proofs/artist/93f1abc9-1005-4432-830a-dbd3a08f0dde.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 0x5de4227676acefeefd5732ecfc91ccdf6e899e202775376d84e763002a3ddc51. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TW2294065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12b5079d617b86b02970c6e0f3e2d22debe743a276c750b9efc9f5795d94190. 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/QM4TW2294066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e31b20ad74b58a37fd286ea736e3519046df5a939aafa60d5919e3fd225abbc. 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/QM4TW2294067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5401418d803f25ec63f1c9c6c3638895b6dc17dd35e83727f21fe88d1cf3cb. 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/QM4TW2294068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa329c8634cfd977b3df0beb9c90f244110773bc1ba58f50f4ed18eef114208f0. 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/QM4TW2294069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a4828ebf9942bcdabfa344a2452892ed74d53993d70cc242eb0f7dfa591235. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM4TW2294071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c1cb6297e7acbe2e89cd8fce6070a9985e17fb174a3448f005e4276746cde3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2294072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82062775e82dc175ba17d6e285def95e5526ab1167305cb50c6170ea770b5f58. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2294073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05234eec6c71602109f7341b5c85b87332335b2455a77543c37d3b420c93c16a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2294074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad0e088412c8bc609ba58847a27ed4367285e63bc2690470cac401955310ad3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM4TW2294075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3288666638c2d32b077a4c5cead1519a81822a4006b5c86642debf0db2009534. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM4TW2294070.
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 0xb57555e68f059aa4f589cd8faf5f5c260149c5e0ddc10dad96a46e608d1ed0e2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6P41517076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36362bba8f9372024f7bb1f70f01b63fc499cbed647562dcc76542da41cae17. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P41517077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191674ddc1689111f7a1b6de75862c8f4fd7bdb8243724cab5e56b7e42aee575. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6P41517078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b47e5d88cac39ae07da46027d0a3d5c4538a450313c583241f7ef11f11486c2. 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/QM6P41517079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05b73952366642d3bce930d632f13705dd87a710a67a1dd159b6a2d645cb6b3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P41517080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfe0554cab57093c5bbea7998aac1ca00e47e3f836065aead76cc70ed1d8271. 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/QM6P41517081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4893ef054e212a38b3644895b97c2606bb492c51206d10adefc88e7cc5e7629. 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/QM6P41517082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e77211cbb19e8da47f626f312d209918f0677ca3e2f7c0237ef008bda9c2a4. 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/QM6P41517083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bf128c79c9c5dacd8ba991ae45ed44837437d461495f7941e1a2f88a254db5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6P41517084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebec47032b43b83e3830a5225f3303ebc11b1ada5c01971eeda9c356fccd2026. 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/QM6P41517085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24f3d54b74a1431e6b15dfdbc28882d662a533b2c7afa6ddc04b577276de095. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA71399918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46ac65405798331731d21b8e99ba17feef5ac3bca060015592fd7b01e6866f0. 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/QMDA71399919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115a08c3f2a3f471e7fb1959435105cd3af0f0f832ab6a106d31b8fadf4c0709. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA71399920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d0ac773c737114bce3fe8df07db9368ddeb14cd5007c064b83e468aeeb9753. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMDA71399921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616eae7499891f44fc7e1fca7cc050c31c211d14ec845823050bf9627440a759. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA71399922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c5d2b0eb4a1b8f09ba43d2abe3c30876e2e7233120a15f26957747cbc8c749. 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/QMDA71399923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734f2649fefb5b2cc984386b0f361a9976c70a5f53e9e98ed99e2aa1d02691ae. 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/QMDA71399924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1003d2e5d1e8c26190ddcfe18f742bb98351a8ce4433f801dc36c76effd4e25d. 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/QMDA71399925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfb123a5dae6eb6d75de639e3c7104124b9c98711a2f9e29aafc9de2c6be53a. 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/QMDA71399926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54613ed56d68eda327054e1825b4c23b201818e9475274f30727f65445414b67. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USV351396061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa693f7474dfefee57f02374c90076ae5f4dadbed2a5558ade9b5fe722537d86. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USV351396037.