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 0xe365159c55deedfbf05763a4dccb9d871483027acef8cd1fcc98a40435481855. 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/f74cecd6-8eac-4eba-b6f3-605d2b4eeadf.json and https://artists.proofprofile.net/proofs/artist/f74cecd6-8eac-4eba-b6f3-605d2b4eeadf.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 0x06274198b4ccf324f13be7a3825d07497e7f3541d472069a943bf51200412437. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFL2474820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e00683cdd93da9f9f42819b1db400aa6fa6c8c2e415c4bb915c3aa5b3c41cd. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/QZWFM2407962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc07f0af3d47ea749314651474a38a111be534ba2d48515dd19c4a01514e3cdc. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZWFM2407963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74867f778e2c6183f6811a547699877e530e19e7d6084133c42fa40849a16a96. 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/QZWFM2407964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eb56373c42166696cdfbdaf4f0beac4369422f9d2c241527005cc5dde57afa. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZWFM2407965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f161180a8ad8b90817a3d00de4cd68cbd269a36e6c6bd3a88d58fccad947946. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZWFM2407966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626edc7d7e8d0c3039854d67d126f565e8ba8f611edeb6b107b2ed5c20d18007. 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/QZWFM2407967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd265405c3c6a973f8d8d5c7636e569da860b9feb12bafef6630dfebc34e07923. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFQ2492754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde78d10afd93144bb4f793da10b43eec4477796000ce7cee5dd411e3ebcaea4b. 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/QZWFQ2492756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85268c9112e48c0b0c7869a9ec6d898226be88f755bab4faa3eaa006f3f7be1d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFQ2492757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226dc310e34b0c0dd6c24adabd1fb5e036f18ec1215ec7d18685b8cfe19970f3. 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/QZWFR2455871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e64cd88278dfe1696466e312a0e26a4f58b9e1d002662795a915007713fe697. 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/QZWFR2455872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5f3f48d8643c78434c892b5c5ab8d0e92d309f85e501b5a1632a9c8cff3d72. 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/QZWFR2455873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df65568e18f24a7c72fcc749d886ed829772806a7d2946c93924591ebd55e0e. 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/QZWFR2455874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7429a36436e1b87b465780f38eb8c3e0ef1c87605b89d04fe141b8c1c6109d8a. 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/QZWFR2455875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a90615019dd317f42a28f3f5ae137e8ea0f9d6e9953509a56806ef27a269e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFR2455876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9292b1ae36bdb622a59b7ff1664010d9c2b352c0555b463cdf9667c3aae88c2. 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/QZWFR2455877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4f6a2269a5128f985a5773c683032d19a84d7d872f6406ef0cb18e204dd6b2. 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/QZWFR2455878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd3a00f0a75cf27f865423580cde7720c75384df0d8368c1d6766a4a98b832f. 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/QZWFM2474750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c4bdb698f0656f5b017021a27375a50efdd4db5edab114da72633f3cf34753. 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/QZWFR2455879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ad803bf00c7f9bc1c765d84e2cf1f3be70c82ec896fd59abcc3b2c054e17aa. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/QT3EY2498764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cef01c57f6cc8edb1b18ad470b43b9f2fb47c3905764caee14d48a060ed495. 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/QT3EY2498731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0f63fceacc133b1961089c0684dcf3c5043bfd6c4b12601d0258310c829d5d. 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/QT3EZ2491383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9885a0ecee67c74395fd76f2df21057ebcc9340fedc97c54d4648846b139f8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNWY2590833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d17d521953cff8a174bfa0c667bf24a157762c51bdaf5a1d64deb9b89e2b016. 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/QZNWY2590834.