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 0x7305f5e826ba7eeb597113dc6bec63854a69ea5a0af9e7c32d0d7a39d5944c2a. 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/f796ece0-80cd-4016-ae3d-a03518ad9a06.json and https://artists.proofprofile.net/proofs/artist/f796ece0-80cd-4016-ae3d-a03518ad9a06.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 0x95a8b57a8f8c5aeccf00e8bfcffbd09d7574d1a419d634a5658d37978bc7dcb7. 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/CHF032212147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1e4d3c0464a70ec7797f6e6d93105f10d1206be68aa2eb69fe27f777be4a82. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CHF032206842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8b4d9b1c724389bda53f7b46a66856510aaddc1c89154e206d3bdede0d3a41. 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/CHF032216954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc150cc231318393edb08abb42df24f1c8a9559e8c7546b2852f00dea9c2ca8f. 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/CHF032231919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6f6b1aa87e1858b91ccdbe73d99691dfe1de7cfa961b5a00de2d68381e5dfb. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/CHF032265219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f5459ce088e76390f2b1e6cf78dd6fdc8a19a1ece01ce0d523c17822c90c04. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/CHF032349208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7aada4a65bdc06d6f9977315c3f44f3a623934d1050b3dc60db76a9688c755. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CHF032366731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd500908717a087e520b5627be683d0107cd6cc4d7ef234f6d33e594db414cbf5. 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/QZTAW2289275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6fbc269fac0b09fe740d25802f354863d9557db788068416f8bbf106e74f62. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTB82291659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd571f9f71cce143a3b7dbdc137bbb11dcca2ade40845a917a3e67d4c4caf054. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTBB2265079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b4de029ab5183f45f271d4ba4cb05587b0dcff8592b18628edb8c4174068fa. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/GBLPF6741315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ef734a040b313fd0593aab6e2ec971a26e329a9b61346d6292c8573a3e6476. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBLPF6756502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf302fc70f476c2ad2c17c83528ed88cec163d178d7f212558689f875e445e173. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBLPF6760421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2b0598b58c8093e1b3dc8f9561a8ddcc5d1f3b1b5586496dcbb014701119a4. 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/GBLPF6764437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fdf13282b07cdf1380b15788635d17d7acaa02ac18fdeea8517c56a4d0b4f5. 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/GBLPF6767729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4114f0df8ab93863f10de9bd83d2714bb6400f0be752b9a7ef92a963bb21f17c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBLPF6770647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b3086ce8c443a01f2c6a961da2d60bb7df7c3731412f11744076dac959243a. 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/GBLPF6771522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2da175e2587f01e39059fdaf329fe3466886d34ebade6ee7e4fa7aa8d90e183. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GBLPF6771511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90f0a0aa0af16fd7952a27078687439f2c270d24604ae8a62aa6c54b0c95ab7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLPF6771512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b27acdcd849ba7ac4141ac5b63297fabcfee34acd468fc45d7004f7eed57f0. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/GBLPF6771513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab07e3a7b0e2527b04009ba6e3001b83973db72e141d1f348e975ef89234ff3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLPF6771516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4cf230b768bb32f0e1bb42b02d0fe648f8e08532e7d13c40d5831fb4c0e4df. 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/GBLPF6776796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f15aa0a6d40e1273db484f0622b8de41bd67e25a29619908d1636fa3312c42. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBLPF6777906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74168d107db3e164d4a9ea8027a8f4e9cb27bc94470db224c2278e5b4a4d5c7e. 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/GBLPF6781160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc790c52f96bb49aec33961a474f40c7ed10a3e6e9412b98a91371d256d864f17. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/GBLPF6783200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb795e338fe2de60983b5e479ffb2d0e48f769398d9bc7db90da2acd7f3fcb59. 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/GBLPF6789570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4114f0df8ab93863f10de9bd83d2714bb6400f0be752b9a7ef92a963bb21f17c. 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/GBLPF6770647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fd5341b05b2449817f2ad53b1e7fa25edb4db802fa41049b2582179fe09e0a. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/GBLPF6789572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0472f5dfcbca993c8333285817e01a8b7e9592ee64a42dd08d5e3efe944ed20. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBLPF6796199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbcf865a2c2d46e1f0dd9eea9d5705f1b53aff8a2da55423c5f8a7dd926b6ae. 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/GBLPF6811120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbcf865a2c2d46e1f0dd9eea9d5705f1b53aff8a2da55423c5f8a7dd926b6ae. 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/GBLPF6811120.