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 0x1c25de027c9cef8158794a5d93320de20a6e7e1d8443cc0447415f52f6085915. 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/716d4221-19f2-48c1-aa31-8b3d301bbadc.json and https://artists.proofprofile.net/proofs/artist/716d4221-19f2-48c1-aa31-8b3d301bbadc.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 0x147d0c2dab663d9d34428d169cfaf30202947e8dff0f22c80f404e3cc36d819e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/AUMEV2397189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe83eff189ea1c68ccf209845114162c73baf69aa764f75c5269bec4ae257c0c. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/AUMEV2397192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea44da581e044e00a6e383589df72ef82bfa6df1148968a666c95879c1f501c. 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/AUMEV2397194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b34bc4590cb91cdb967e9ac1dbc32e40f13a1b98c2febc81eccd813f7f334f. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/AUMEV2397195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63f3b47ca931d7ae9a784af726fe1f73ecf796c56b78046cb3ba06299605716. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/AUMEV2397196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dc12973b6d3ff5204394c1b7cb095d9d6e0be6b299358068d4684d057995ab. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AUMEV2397197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa13e3f423370b983e2ed072d638acbd95edfff45eb435844d673c0f2769b52e. 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/AUMEV2397198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48df3b2ec0a070656e174fb1beba6140b98996729bc0efb6eeb66c5a86ea2051. 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/AUMEV2397199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bebf8bd714f3ee7f6c580c98d23e1d5e3f3e93770dca0d6f06d4e67ab76339. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AUMEV2397201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cf812746b7f9939b9b2e03da70b372e0c4001a326a4857e3ed6519a8e902b5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AUMEV2397202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf538e8c74da66715dbfae0c48aa805210288f050b96e6e7ce041ee45cd689f36. 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/AUMEV2397203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbd58c61498f8661d6d806d2070c33eb317024ee64633142757007acb5336d6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/AUMEV2397204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fdb6f6c8a9624ffba47740b9f783f82da488c54e78c6db6920abe83e01bb1d. 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/AUMEV2397205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2c33bbdc9ca8a6cf914434681bc48fcc5cfe8d4cee739407c6986dc851ae8a. 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/AUMEV2397206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8d8d5642d6a3180dec4ee9abe95e3809a9d42e312f6065339713e9c82fb6c9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/AUGBT2321555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2933af8d9303ffb952fb25c07e51dcb818cddc270ec3967abe41ff77f0e8469f. 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/AUGBT2321556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27396066c7ad4a2c262bde3c8f5370894538de455917e31f58df71072dd4da3d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/AUGBT2321557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd7a5f4c7c8224db7232f1adc9a81416d175bb7c3e724afae05b46335a07216. 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/AUGBT2321558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6588a84bcef88ad6996a63c6b285f740d3a8127a116d399d036452e0be046c4. 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/AUGBT2321559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2f60fd50c64f7a987a81c220ff3749b7ba4b5bd6718782077886596be2d8d6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AUGBT2321560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b4985ee1afa40b685166262703b4e4ee2d55a7537e8d478364a5a3b6aa90c9. 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/AUGBT2321561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf792c4ad1f682cc442073ff97bcaf40f10a8463e08e842b65659a2ef37697f6b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/AUGBT2321562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834ca1ad6ef4f9daa8ec9f52d752ce119e14f3032e8b3c1068a41950c45d50b5. 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/AUGBT2321563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15142416beaeac2080c87d30996f3c55a1da9e03bd0dec1ac8656f0624287bc. 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/AUGBT2321564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5107494252ff425420e3349544782619c1dbbec0dba7f47ab5c520fe4428d6f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUGBT2321565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a622536faef1928a19b46451bb40e84e30ec7d3d5eb37c4ba98e8d0fa6dd83f. 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/AUGBT2321566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e32b568f1c7716513fe6bdba949b1c32fcfbe6313fc627be7e7d5ea5fb1aaa. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/AUGBT2321567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a8cc72f8b4546681dd1971167cabfc84621a40dfc0d82612309396bbbfc235. 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/AUGBT2321569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3732809ca806943d8f128d51c98e4b871a2037203e2f96ad603fc82bef70eab. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AUGBT2321570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d97abee6ff0a4310ac9f0a9a5352ef39f590796844ca43c9381f7e689b05f3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/AUGBT2321571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c5488234dadb54481d8cb41ed549e78b9aa9c1af7cbc22ebc05ecd3a0f79d5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUGBT2321572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2778cdb4bda97524c139fb34f8c7add9b6e64b0a2eb2e89bb36e45f467a71b4. 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/AUGBT2321573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1516c6b0e400e229b9b12fcc3c6d9e3a5875423924c914281f5808a45a5b7dbd. 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/AUGBT2321575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d182f20ca681774268168fbb4916747bf93429510f243b28f14bec1fc032ffb. 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/AUGBT2321576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daf703fd1ee0dc9eebff103a6572cdbabd05095ea3693dfc0fc0a1be62e9179. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/AUGBT2321578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a4dc488bc94fc1731ee0f7927ae351b188b74c00b8b7b90f343e523e1b9a2f. 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/AUGBT2321581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55a0ce7f39303a0d223a68ceefed6bbeff758f74aeff957a51bb1812769582b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/AUGBT2321582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e54730f2eb01fec4e03a95ce2d00a9607f1b8d78273fb3bef1bf888bf103411. 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/AUGBT2321583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057af48685ce3cd488dfe1bc27482e771c8bccdbb98ea76192aff7d401fe3fc5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUGBT2321585.