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 0x39bb2bc84c54394d65bef736a1554bdb540d16f13c4f7db9331faba3c1232b1c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/312e2f66-6223-4773-bd1d-01ca0278b2fb.json and https://artists.proofprofile.net/proofs/artist/312e2f66-6223-4773-bd1d-01ca0278b2fb.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 0xf4a8528c7786c21e34d6eb4a248ed5f508fc746d82f46ea98f615da1ec7d4629. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USUYG1270451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9c6481b99ac6482f9bdb9345b9e22ec1a5e4a0ced52d7422225507f5b3e18c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USUYG1270460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb415ddddeed8b225ccfc3597d5ea6a74653b75a43a447f2d520f0fb51b689b2f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USUYG1303688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f098132d60e99c76bfb8eefffe816aa894f265fe965d847b944860a0d6269d8. 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/USUYG1300534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc317d124a91e562de30990460576660a4b214289ed94fbc1df4becec51f0572. 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/TCAEX2047315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf460d9614b329cc31d34a25cc3c9b87d8f31b5ced33972a2229b4d5f25f32410. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:43:27Z), 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/TCAFI2035745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e0884058dacfc1df654307d688611e8a656f5e8c8d392e0fab7f3182c6ac44. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA5KR2190326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5729fd6145615afec6c671210fe2b49db5792a78772b698855bcbbfd0d88103f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA5KR2190329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da926d0a18dcc102128f8533b7604eab9ef7eb18923ed2778cf12c22104fae8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CA5KR0014221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970ee9422dac35693ac1a7f395c487c10e06e7aa80f2729d0b4245600f0af913. 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/CA5KR0014226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2409aa1663528dc5d46c194135ab3c1a4d87c70630089c3165ad88988c531868. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:05:03Z), 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/CA5KR2415582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435071aa4868adebdd554d7d6ea8aaedbdd58dec9d69f00fde0116c9dfb500e5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2415583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80e44762815e80215b58e9e871244fe548c923fe9d3d0048215ed31f3826bef. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR2415584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be05d9066f50a57f4dc5ac3ef8848956036e6ccc5431e8beaa4db7bcdb265d0. 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/US6YC2103209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf5c37a52a467d40f74cce9e78ccd6634f427d31e16077bd53b486781809a47. 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/USUYG1253999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1495bde212584ef78d302f2c352806a21e8a699960391fcfbff068f599c9a284. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:05:50Z), 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/QM24S1923607.
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 0x31609eed1a3c90d8548cade5af9d7966d34610d9e394a322effe5dbf771ff178. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USUYG1503045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa739cec902208e879d8a6b9ffb9f7236ce52bfaab5dd97f2c0ce34a3c93bba2f. 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/QMFME2191428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d90d8c96f76653c75966a7fa495fce5a4303f677ffeb37d6685d33fb7663534. 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/QM24S1811038.