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 0x2327f1f74a6cc81af4d963ce0ead63d81b0c5b53ddb74dc5e769509e8e1454bc. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f0744fc-e4cc-4db0-b2b9-f44c0ef54304.json and https://artists.proofprofile.net/proofs/artist/6f0744fc-e4cc-4db0-b2b9-f44c0ef54304.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 0xc10dfadd35cf263bb96a1d3d3af71ed2acb97386051ede3cc0ac83e9e915d4ea. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZHNA2223973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af3d84f8a52e7372e3f14919af01e8e61e828bd5d978794d48fde78846d6542. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHNA2223974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc7a001514fec22ac6892335d9035e48b6ea099877baec2fd372ff8da78e9f2. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZHNA2223975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d916008e12fda84da34bab88af30d696c83320e2d2898d263bdf0045ecf1c9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHNA2223976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713ec041bfdc52772b895358a4b0ad4f9ebea78e26650fab2b4f8261e37490a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHNA2223977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94697d8a8d997466a39b713fdcc1097ad278c7e405a7fc0ffa00bcb178fe390. 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/QZHNA2223978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc21e9e7532f8c1463af4b8b5df69d81c0eba5346b6c9bbf48fe691397d24c3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNA2223979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e579c9f4a84f3227fee180bb3d4023fd0d954026f4232ce995323b73adbe0f. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QZNWY2176203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cfa49ee024b86e6df2389244d9fbfc9f1df3bcb6af54ac8c2ce7ed5a877c6a. 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/QZNWY2176204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be24868a8570b3552589d30419522b89062faa5d910c0c28bcab39e29a0f6b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNWY2176205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc927c8c46f7b4a47c3591e044213dd72b4dfa62ec76d517bde2c65bc7d3f14. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZNWY2176206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48190d9948f386f08ad9830bd8c6ae3d4330a3bd2082e364214e7235aac8079f. 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/QZNWY2176207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d4ffa8d39b6ff5b4e5a64bc672c5c0c9b8632dc970bd26e0fec8241853a5c2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNWY2176208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974cd673a82b9becde2c660b869897ace9777c28200dedd62e642e9709670f0f. 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/QZNWY2176209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb8d9b31ca94566ac3e6808acd357427875a1a973099599cbab1a4beac2ea16. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNWY2176210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d53cb5d99f71cf697a19c94a79ff6188708fa7234f81086e0b130c6fdb1e16a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNWY2176211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce2bfc34c11bf139e48a0446f22ccac8f91275ec53ecb2258fa3514dbf53b57. 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/QZNWY2176212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc1ba5d26c6cad37d68db0008915a42397dd1846d88428ecf25e3b5c294af0f. 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/QZNWY2176213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349bd6d8a121b47e221258603bbbc3b302d83718227b03c95e5794bc9edf8bb5. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZNWX2190290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a240e6a06f636a45f88475184372852aa57c2875d9b334be8341423b62d8b3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZNWX2190291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b35d83cff2135dc7d8ed2307494ef9d304484d2b8505f309e4a5ab740b34ab. 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/QZNWX2190292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f19621b2ba32fc116e26531ac11f52d8bbff9a58372196c2c181b07d4d8bc9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWX2190293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a38e95d3b8e8fbbd8cff589504137f2c0a32829931c36f4dc7e06a0c689b76. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWX2190294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920211733b0d171917d4c869b02d2fc2d9cbf56be66239cdab6364fe60c25dda. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNWX2190295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d732ccaa055fa97b906393df487f710ab4391d097be3cac79d5ac821b3b0ff. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZNWX2190296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee97784f418ae45a074b21f700d4f72cfe8c402e98954cc4ebee4f1d6919f18e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWX2190297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed9297e6f8d475ca846e5e867d902e238051af446052056577b306511e6067b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWX2190298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960681858338c83edb7b842ec93e9eff58429c7261c54501fc875cd15509a41c. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZNWX2190299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ab2e5cff9ae2732df65a1214f5285d170ee67a21f619ec6df4669f77a15b8c. 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/QZNWX2190300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa058812260933524ec9658f3b40a036d6675acbcf656f3c5a0d19c5048029273. 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/QZNWX2190301.