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 0xb74f94fba644a01829f5ba0be88bfacf372bb224a86e042d3d6607324011128c. 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/b3a5b031-3c27-4d1d-ba91-8268529564fa.json and https://artists.proofprofile.net/proofs/artist/b3a5b031-3c27-4d1d-ba91-8268529564fa.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 0x73eec624af067e1baa096822174002e5d713bd2122c04ec3b74f5e9ce5a42e20. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FR59R2284281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f177ebb32a0aa7a9b9fea7b0f5f222f5510a87120c7f0bf2fd48e02f4d40f69. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR59R2291911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb3b98f323413008dc3e1e161a46fb7848b758b563669d145962251a9d651dd. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/FR96X2203498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61c94188a1c1d5aca8a7dbc6182a5556e8428f79533366787709022f6cdeb4f. 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/FR96X2203497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7adde4ac8aeb24a0b483f3658c5e063d8c82bf104fd2a1875f9000416b0baa2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/FR96X2207699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ec75e48787d29b156ebaadb75f0c0df644ee308b4b889b3415fbe559680c2a. 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/FR96X2208021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2c17e2bb6c951eae6c17661a6ac5df217b7876f3cad3de8d525c7c620bb865. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FR96X2211910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c56bf678a711987e20674ea087d8a94675258e6dcadb6caaedacdafccef4941. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR96X2211908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7faa02e5b19a385aaf5eb9c9ec019c29dea405833b87ae7ca5d38f4a351ecb. 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/FRX282202671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1293626ee5fea65f10dae75cd61bfa20c40f85fb0ba863ca2328061b7fde10. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DGA062233166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a52605b41e52fb8af49ed8189cd3465b520f12a4994ac93f1c6114272554314. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/DGA082272263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59301aaf3a5af5496acda1723eec0878cc775b0f47ce1d80aca6b7a3500db556. 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/DGA082276072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dc0769a0a801502a40786defacfd7c71131212d346a2b2ad2a2d37f18e5d7a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR10S2377829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1379c98049cf3180bb3a354eaf1ee6bcb0c2b1fb283ec6690e2b17af4bd8e06. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/FRX762349334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8f443636043a484ab14bfad3baa12534cad55886e4f0867f5de42eade682e9. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DGA052367947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382cbea3b414e3d98058538c53f20b0e8589a0d1f8cb12684ba6272a2ed97539. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DGA062307154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b4ce67ab3891d849a0e36e17fe8fe977d968d098534eec2f1ef298ef75d8e7. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DGA082375630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa983a7372528736f230cf38145bcc16fcdbdf58ac544dd77b992935426817b92. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA082392623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cf2a92adf2fec8872411a96c8d4815770bf2142eafacff7af5e8de245b849c. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/DGA0Q2344490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0fd4c1fe466d4f9f13da6b98942088714c0da74d307fce4033b59754005f77. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DGA092318253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425e4e90e6d15f779c3bcaf88c8cf552fe8ab1b828cd7fb92fc7cba88fc142fd. 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/DGA0H2308148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345fa91f726b64441a27019948b8e84dd5288ec9fc2d7098bcd2252352e79168. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/FRX282410891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19338e9353b836b811520d54c4f2a3aa9f8224a46a0127e3e00833ed6c0de017. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/FRX282411004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bbae4fbd8a58bf3ccc4d0e3c9dd9daa1c61866ad6862ca8c3b970f0224a474. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FRX282413988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fd97f804b17959c4201c496112129c7f22a1a05bd210e386324e2c2fd8e49e. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/FRX282416627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d34886ff81c7ec11792d476ea73cf54a3e6d2eab5ff1db8926329f6af108212. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRX282426292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a97911bc999db93af71fb5cf90034aac55966c3682cf43b9af27999933fe787. 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/FRX282426289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979c3dd59db1561f97aed163b978867b8144c9cb0ba066c7dbf19de0f4a14955. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FRX282426298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe18068efa67c622560038527b79b904cf6492c8ec331d2ef884353827ad930. 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/DGA0H2407580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677e0c61a69e1c9db2381b5027848b3bc2c4a88c9feec1481725ac7a203d15a5. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/DGA0Q2409619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bfd95c27a27dde13970c6035497f7a67a09797ac169a4ebb46492e0ffb6952. 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/DGA0Q2480974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8278f9eab18482b35241a5ad3e25b4965f8fda0c2fd939574950e559712231c0. 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/DGA0R2452658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2696a9d3ebad948527b1813822702478c87459d3dc87ccab6b1f77c424884b. 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/FR10S2548542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514e78da22e881caf9aecf875cd8700720139b07f0e64a33b30c86dfdbf28405. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR96X2543075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc5b6a01fab0051c194d894fb073cf37f94b5b5c242b6cc2a8e24df84e4d827. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/DGA052553151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ae55f6af3359318e74500a37b532177ba64dbf07bcdf4aec98704e88e726d1. 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/DGA062592610.