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 0xa3e9bb8113170afb4bea07c3b9048c7c2dcb01c71a6596a6ea98ca5e50b4310f. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a22ccfe-920d-4754-ba2e-bb5bffe6ab99.json and https://artists.proofprofile.net/proofs/artist/1a22ccfe-920d-4754-ba2e-bb5bffe6ab99.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 0x21b2c5a2a4d2383b0bef1fa809f4e818d4fe6bc3340f6fca3fadca1cf9a21409. 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/QZNJY2277893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6e5cba5ca83ba3ff14615505ed530200cddcc6c475975ffce8805bdc599c80. 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/QZNJY2277894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbdcdb07db8305d6a10644dc968c87aa3abce4ac0bcec0d105cff1ccd3f8c8d. 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/QZNJY2277897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777500c4c74958fb28f2a0e6dd0fb7bfaa6da18987f6f41b895d9b6fc552ef75. 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/QZNJY2277898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eae76f1c41786e9268d1eccfdfee25b5a1059cc0e7af338ce6cf587926b504e. 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/QZNJY2277902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f5a78f85ce360a40a28dd0293fe2f77aa60819278cd0388f93a3327d0f8b01. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZNJY2277892.
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 0xcd5e022cf7b8459565f65143699c5869db005cbaef47f80e3ed36358d34330c4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNJY2277895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c2c386da18eb78ba10fd9b9043572a3cc8b991f52844e67a8308d41ecea274. 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/QZNJY2277896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52ec0b0ce6e19fc3e45b4192f0573c58370b2e31d6ca4523def100d08ce7414. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/QZNJY2277899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d2d828b73ca95c28130916ad9e3a3f7733f2aa8ea689dde69c086457b345af. 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/QZNJY2277900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe219ee37c522cae0898ac24c6c6d20a5ef98b786f6fc2dae9679a8e66f87764f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZNJY2277901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294249f2dc1304f56b8a8218524c3702796cd18f61dfc92291cdaa1204535aef. 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/TCADN1897617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde848af9a4a5be6f1f78f3c4d8ab7f17e51e34680222abfdcc9a3835936d10a9. 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/TCADN1897619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7ca178969ff93126c7583b522950370ba1ff1a4d9e1765e1a7dd969c03315b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCADN1897625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05e9de553bd7feb4a60828270865d0cbe33c14ef740992f83a3c8ff897bb671. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCADN1897621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0458d6c0d5af4923504fc1ef843c4ee78a92053e8863d1e178bba7daef1841a2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TCADN1897612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be99f2569325e88bcb8a60d5b887eb6f71ac95a036e615ac9eddcb943aac7a4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCADN1897613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe762fbb958b57cb80aeb451192c4493892818276f1a1962b5b2b77c08c81a5ac. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/TCADN1897615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6566247fd87fc7d680423ce54793ba1e8afd460ef60a7de863cf01e36eed89aa. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCADN1897618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7c3e382befb7970899c405488df9d2d46d50db1b9c473b5ccc06647797f81d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/TCADN1897623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb260103b0ee542fcee662ffacda81fcf44fa16ed6e1192319ce0bc4247eb0f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTPX2201482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9584a2e66fc88dcaff9d86c066142aed506f75a0955ee91ca5af4245ec2ec71d. 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/QZTPX2201422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff8812d7bfd7cfe05101f598313ea1f57dbb323a608f2c453fad490dbd2461b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJV2265587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8114524ba04b230ce8d787a55e09089fdc7c757db4fea21c51cad1a97367cde7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJV2265591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd34702266c803ff7bec30530bd8866e2f2d3d47fa2660f4fdd38686cc456b5. 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/QZNJV2265588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7d03e7fd4ccd929ee443f0bd7780d156989be528460df7208c6dbe5a2c8a08. 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/QZNJV2265589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6356fbad449f37866c3eb5ad9c7e4f438901d0a24894637f6fb89eefad79a0. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZNJV2265590.