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 0xf90dfb4170c8779c6e94e80874e8b8f864a286f26133850496bb91708824cd36. 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/c3804fa2-2964-4744-9874-5080f47f349e.json and https://artists.proofprofile.net/proofs/artist/c3804fa2-2964-4744-9874-5080f47f349e.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 0x725fdd5c49785426aeae3522b3ad396bac94641223c2dc07d36b074792eb7cee. 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/DEH741913824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a062b6cf8ca0e4e642066ed3c6f79fb5731d27dfc2d3fe915038c260e65e46. 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/DEH742167307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa356f37af12fdae6c473bb82239919efe55c29af5244494984df870256404e11. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DEH742173366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554b7e8bc367cbca671a1100113141d00b74413eb9e2207bdc186eebb89fcc56. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEH742174567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60360db48871ba5c17c2ab3d595c8ea18d6396a8df75eee58d732c34b57b75a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/GBWUL2153287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a3ca949d923641bcc0c5d8f35e81eacd7b1f11b90aae7e6ae85f03b9509075. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEH742176175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc398d73d1d91af89118a00b1a70a2c020cf51a832f8fbbefa384f28eff61581a. 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/US83Z2150830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9805128ab83a5dd6f3516ec0f58435b02b613577db6c9cb6a0e801be7da14c17. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZ5FN2269670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3945cebfab87910f69e1aefce51c422e67121a08a7766e5e34a6e23f2399c2f. 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/GB8KE2422923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fe843d4599af1346e8a4edfcfabba73e311e0f3af95adb4e90d1bce6f79831. 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/DEH742227826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fe843d4599af1346e8a4edfcfabba73e311e0f3af95adb4e90d1bce6f79831. 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/DEH742227826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386209e2d048bb450a2f04ad1d3a87cfb7dda480a4e7f168070d1d8f328bf6e8. 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/DEH742314897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5ffe84b7344dbbbee3a3f676b4ef1a7b1e6757399a16e11997389144613eb2. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GB8KE2402271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca43a40614677e7ae1d87c373603edd3ae3f88779ea7c2b8ee1113e150ed3fe6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GB8KE2412506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a0c7fb49afdc3a31f1600013d3ec1444f665516da234442d33d69837b80d83. 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/GB8KE2419066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b09fc9cc5dba1157c91edfb24bb1e2d8c4225cc164eff9db80dfa6f27fccab. 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/GB8KE2419873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3821cc69d5228016a0eec90d70b958d89c040fc77484553f19702f62db4ae7e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2421338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e5a2ff8bcd62ddce93f08406b3e6271cdba3538ddd57d9dc9a3c8055af91b8. 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/QZWV32443017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4066ccf4895e9381d77aaf69e6b7e5d3c0de069ad6d42c6f0e4eaf9932993418. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GB8KE2425320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebe814e145265c01697ce0260d8be4162aa0d3b1002887786bc54fc2c2bedb9. 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/GB8KE2428960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7213eb8a275981802d8e41cad0d5897cff0dd7f164c6cc20eded6728eff165. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GB8KE2502391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ff7d07e36223325d366e6caaaa99f2afbf8f9f938ee8ef82c28082f124efa9. 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/US83Z2320139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303e5cb66c064e6fa67bb7a0183c09a0b5da3ba14db334b17590991b07a397bf. 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/DEH741913822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995ba60b5064fd390fbbd8916d9a5de8b0ac13ef388b9f32538953623261a4b7. 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/FR96X2090958.