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 0xe383cbb3f4ad345f90d74f8e3850f81289263ee969c14e87952b1916cf78d4d5. 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/ced7a6f0-d68c-4d39-8bc6-4a2ea2064478.json and https://artists.proofprofile.net/proofs/artist/ced7a6f0-d68c-4d39-8bc6-4a2ea2064478.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 0x2dba516dd2b8f72d258ecea6c967309a239fad1fbd6705f8f8aac6db2b541aae. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:10:45Z), 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/USVPR0831180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612ed7253f57af1fa95956e9f492cc42d664d379f9a8b64a80982d6a22492975. 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/USVPR0831181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06118107fa31722fae5a3cd0e5767b1789fe5d291cbf6c4c97dacc4ee8da4e57. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:33Z), 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/USVPR0831182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabf8c55312dfecf17d6ff4fc4b8b8c2cd71ee4c33d494f175351b5802b0997f. 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/USVPR0831184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6295bb312bcabf73df69cbee672345dfeb6e2448e1ed5b4e8391b61c6f503c52. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USVPR0831190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc688e9e3d7b7982d5a88351d40b2d32c3d5988580dbc46c3d5dd56ad860e3b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USVPR0308922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6af34912214276d472d5b0dc51d71da1821b9d8854da26dc432b421808005e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBQXA0701280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e0fdbf5022369ab2f13b9b9eb9765530a4a204b7c501a40fb2de4407b4057f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBYLW0800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44adab8dfb5cc34daab56457e06fa6ea69bddb8784f09e2c0507b5ab6f61782. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/GBYLW0800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b39f79b7622250ba74e1cca655745b1a96dca343bfb2a43aa798e227d85580. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBQXA0701283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db3351625590e0ae6ebc1e6b540bd579e6be7854cbfa9797fb73104a13f814b. 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/QM6MZ2112854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507f01b47b9b305a3202ced98d2cff50ce59476cc71efbcb9f7ad6bcf38ce354. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBVVQ1021924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b19e0fe6b591f63f32c5170c06ea60d3848dd0aa042456bd584d60d024cd1e4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBCMZ0503037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9800a5acbecce5496de66999233fb8b484c5577417d44f425047013d83b459c8. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QM4TW2273879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d873a9302ed4b63479abbb65f6662ccc2630e2364d71ae297c01fc71c590790. 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/GBVVQ1021925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe813a06daa04af9eb40453cc6dfa8a6feacee8bfc35f3b70c9b7ceeb2d803922. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBCMZ0373192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cad56cc7148a36dab45a132e031745314183d7c4aea1426038ab798ca45001c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBVVQ1021928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28b34c31d3b7b70c17c1991da40907f1126cd0883c3a9bb3fc6439f4f14e2ee. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBCMZ0501214.
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 0xa69ce13b284fadf8284124bfcf02bd63d7bacf673e7d0404e894b3805b71d513. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBVVQ1022189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35473b7b24b6842921e78c9acaaea5f33547a6e63fde596a4c14154b8e24e65e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBCMZ0502851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cc2be9ed6051ca6f2c5f1621186aac1a4b9136835114f64be57ba368409ef2. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBCMZ0700226.