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 0xcf5b76a2a28b630d10cb49e9434b14697ab2f9061a1901df52915588ba481bc6. 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/078a7f21-3101-4864-a442-b1f23a07d1b6.json and https://artists.proofprofile.net/proofs/artist/078a7f21-3101-4864-a442-b1f23a07d1b6.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 0x367c1da4fd40012ebc390fb84cc479f5486a5169896eeaf26744b0912c83fbb8. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ZA41S1929510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc940ab392dce861eeef014b652b41eabb102d47b8ed4bf6311265624b3e28872. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/ZA41S1929506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd631201f81c3f64e39a32c4235d855551f00c4fdb5574d9c72c1eede4a946400. 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/ZA41S1935946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb39f3c69c610861817ad334cb705d7b614a51aca7d000fcd04cd186fdcabff. 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/ZA41S2020099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04a8c62dffd7a21f9987779deb004798a6fb22be63515467c1344c3106b5405. 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/ZA41T2106589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7af3c95748736c2b41a87c132bf754e429dc45a84d8f59b88dcecf70866fee6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ZA41T2105320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7327cf40a322f64a0935a50264002e3f3030e0877413bd029a215f8f45b31d7c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FRX452116911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23851847faecf3d1a205433c544143f825cadaa969ad7ff273d6a6a12f4c480d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX762112026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303c36359a0d4bc2bb39192b018ec7ae4bb597d3d923ce926404fb2eba736a8f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FRX872122933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba30e2be18ff781044e0a45ee8c61c5b84c38db45a188fa56b9ce9e9b07af305. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FR10S2219011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe576a3c85fc9ce7e41ec5254a2bd684041861bf23f88bd571b100801119c78e4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR59R2235886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe576a3c85fc9ce7e41ec5254a2bd684041861bf23f88bd571b100801119c78e4. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/FR59R2235886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454d71baaeb6fea0a439e2cffe9aa392af7f2cc91850ded90af1195e15200d9e. 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/ZA41T2131284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57a96ec9befbe6feeb4996054206bfabfd8e0b3943e21ec1bd03e8d4d200215. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/ZA41S2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ada30900ea4a1a0a78f9c1e3ad330b099642421ce741f34e7cda651f4709a3b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR59R2248745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77041f9c546886b3473b1173d53bfa12c1f0c2da2b16ab76791429646dd6e76. 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/FRX202167884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd44c13cf448dc07ef9a2e7e186b86c29d318089b7da743d889a2e397be8cecb. 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/FRX282234108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ce1d2fdae00c86dcfcd866a677398e8ee807d80f27e8d2d0ebcf4c43137591. 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/FRX282277203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb87ab7733b0681fefcb2ba2d30ee52286614d59d07828cc27f84cb6ee117f44. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/INUM72200224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd698f23e21e612020cf84934406474c6299fdcbfd02203d6e30b3b6df09389b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DGA092373603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83717b802e17fe6c418c54f9bcb4030321ead0bf7eb9953d1d5604e1e9fbb6bd. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DGA0L2371348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276418501351a57a27476f2a714914c663463dc7f8109af428325f0018e56203. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA0P2331433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ce975986c4750369257c08deb9d2d44d2129141369cc22b0034afb155ebcab. 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/FRX282430013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012c1c62838d0abb151946f08c81ce7f2cdad12d9b7e09497daff2018d04c8b8. 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/FRX872404118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d12e0761ccb09e593d93058a2b66dfa69fc0275ff8ad7d432798a6b1c33f78. 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/DGA0L2452688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb652916b9ba44e4f833682c0cab30301c49b13ebe7f140ee26e16b7403faced7. 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/INH102412109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17d7e6154a45dadaf6f3cc19e36e3e75f5243dd92f6569c39a3328b98fa8f1b. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/INH102500534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996648a321f65fb85825c75f00cd0b51064658a4cf00d41b9b15d14c41116f0a. 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/QM4TW2387846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996648a321f65fb85825c75f00cd0b51064658a4cf00d41b9b15d14c41116f0a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QM4TW2387846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc63eb20c03b7f3dbd8ac0d842ba7b355f8f4de92f844281bc4fd7e91d9f5ee6. 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/FR8Q22301023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78f7676af2811668fbcbe8a8a621c7c7b53cec9a69e31d9db8081d946e6b4ee. 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/DGA0Q2373999.